dart-sass/CHANGELOG.md
Ed Rivas ca2be2ace9
Expose calculations in JS API (#1988)
Co-authored-by: Jonny Gerig Meyer <jonny@oddbird.net>
Co-authored-by: Natalie Weizenbaum <nweiz@google.com>
2023-07-19 14:36:22 -07:00

3041 lines
93 KiB
Markdown

## 1.64.0
* Comments that appear before or between `@use` and `@forward` rules are now
emitted in source order as much as possible, instead of always being emitted
after the CSS of all module dependencies.
* Fix a bug where an interpolation in a custom property name crashed if the file
was loaded by a `@use` nested in an `@import`.
### JavaScript API
* Add a new `SassCalculation` type that represents the calculation objects added
in Dart Sass 1.40.0.
* Add `Value.assertCalculation()`, which returns the value if it's a
`SassCalculation` and throws an error otherwise.
* Produce a better error message when an environment that supports some Node.js
APIs loads the browser entrypoint but attempts to access the filesystem.
### Embedded Sass
* Fix a bug where nested relative `@imports` failed to load when using the
deprecated functions `render` or `renderSync` and those relative imports were
loaded multiple times across different files.
## 1.63.6
### JavaScript API
* Fix `import sass from 'sass'` again after it was broken in the last release.
### Embedded Sass
* Fix the `exports` declaration in `package.json`.
## 1.63.5
### JavaScript API
* Fix a bug where loading the package through both CJS `require()` and ESM
`import` could crash on Node.js.
### Embedded Sass
* Fix a deadlock when running at high concurrency on 32-bit systems.
* Fix a race condition where the embedded compiler could deadlock or crash if a
compilation ID was reused immediately after the compilation completed.
## 1.63.4
### JavaScript API
* Re-enable support for `import sass from 'sass'` when loading the package from
an ESM module in Node.js. However, this syntax is now deprecated; ESM users
should use `import * as sass from 'sass'` instead.
On the browser and other ESM-only platforms, only `import * as sass from
'sass'` is supported.
* Properly export the legacy API values `TRUE`, `FALSE`, `NULL`, and `types` from
the ECMAScript module API.
### Embedded Sass
* Fix a race condition where closing standard input while requests are in-flight
could sometimes cause the process to hang rather than shutting down
gracefully.
* Properly include the root stylesheet's URL in the set of loaded URLs when it
fails to parse.
## 1.63.3
### JavaScript API
* Fix loading Sass as an ECMAScript module on Node.js.
## 1.63.2
* No user-visible changes.
## 1.63.1
* No user-visible changes.
## 1.63.0
### JavaScript API
* Dart Sass's JS API now supports running in the browser. Further details and
instructions for use are in [the README](README.md#dart-sass-in-the-browser).
### Embedded Sass
* The Dart Sass embedded compiler is now included as part of the primary Dart
Sass distribution, rather than a separate executable. To use the embedded
compiler, just run `sass --embedded` from any Sass executable (other than the
pure JS executable).
The Node.js embedded host will still be distributed as the `sass-embedded`
package on npm. The only change is that it will now provide direct access to a
`sass` executable with the same CLI as the `sass` package.
* The Dart Sass embedded compiler now uses version 2.0.0 of the Sass embedded
protocol. See [the spec][embedded-protocol-spec] for a full description of the
protocol, and [the changelog][embedded-protocol-changelog] for a summary of
changes since version 1.2.0.
[embedded-protocol-spec]: https://github.com/sass/sass/blob/main/spec/embedded-protocol.md
[embedded-protocol-changelog]: https://github.com/sass/sass/blob/main/EMBEDDED_PROTOCOL_CHANGELOG.md
* The Dart Sass embedded compiler now runs multiple simultaneous compilations in
parallel, rather than serially.
## 1.62.1
* Fix a bug where `:has(+ &)` and related constructs would drop the leading
combinator.
## 1.62.0
* Deprecate the use of multiple `!global` or `!default` flags on the same
variable. This deprecation is named `duplicate-var-flags`.
* Allow special numbers like `var()` or `calc()` in the global functions:
`grayscale()`, `invert()`, `saturate()`, and `opacity()`. These are also
native CSS `filter` functions. This is in addition to number values which were
already allowed.
* Fix a cosmetic bug where an outer rule could be duplicated after nesting was
resolved, instead of re-using a shared rule.
## 1.61.0
* **Potentially breaking change:** Drop support for End-of-Life Node.js 12.
* Fix remaining cases for the performance regression introduced in 1.59.0.
### Embedded Sass
* The JS embedded host now loads files from the working directory when using the
legacy API.
## 1.60.0
* Add support for the `pi`, `e`, `infinity`, `-infinity`, and `NaN` constants in
calculations. These will be interpreted as the corresponding numbers.
* Add support for unknown constants in calculations. These will be interpreted
as unquoted strings.
* Serialize numbers with value `infinity`, `-infinity`, and `NaN` to `calc()`
expressions rather than CSS-invalid identifiers. Numbers with complex units
still can't be serialized.
## 1.59.3
* Fix a performance regression introduced in 1.59.0.
* The NPM release of 1.59.0 dropped support for Node 12 without actually
indicating so in its pubspec. This release temporarily adds back support so
that the latest Sass version that declares it supports Node 12 actually does
so. However, Node 12 is now end-of-life, so we will drop support for it
properly in an upcoming release.
## 1.59.2
* No user-visible changes.
## 1.59.1
* No user-visible changes.
## 1.59.0
### Command Line Interface
* Added a new `--fatal-deprecation` flag that lets you treat a deprecation
warning as an error. You can pass an individual deprecation ID
(e.g. `slash-div`) or you can pass a Dart Sass version to treat all
deprecations initially emitted in that version or earlier as errors.
* New `--future-deprecation` flag that lets you opt into warning for use of
certain features that will be deprecated in the future. At the moment, the
only option is `--future-deprecation=import`, which will emit warnings for
Sass `@import` rules, which are not yet deprecated, but will be in the future.
### Dart API
* New `Deprecation` enum, which contains the different current and future
deprecations used by the new CLI flags.
* The `compile` methods now take in `fatalDeprecations` and `futureDeprecations`
parameters, which work similarly to the CLI flags.
## 1.58.4
* Pull `@font-face` to the root rather than bubbling the style rule selector
inwards.
* Improve error messages for invalid CSS values passed to plain CSS functions.
* Improve error messages involving selectors.
### Embedded Sass
* Improve the performance of starting up a compilation.
## 1.58.3
* No user-visible changes.
## 1.58.2
### Command Line Interface
* Add a timestamp to messages printed in `--watch` mode.
* Print better `calc()`-based suggestions for `/`-as-division expression that
contain calculation-incompatible constructs like unary minus.
## 1.58.1
* Emit a unitless hue when serializing `hsl()` colors. The `deg` unit is
incompatible with IE, and while that officially falls outside our
compatibility policy, it's better to lean towards greater compatibility.
## 1.58.0
* Remove sourcemap comments from Sass sources. The generated sourcemap comment
for the compiled CSS output remains unaffected.
* Fix a bug in `@extend` logic where certain selectors with three or more
combinators were incorrectly considered superselectors of similar selectors
with fewer combinators, causing them to be incorrectly trimmed from the
output.
* Produce a better error message for a number with a leading `+` or `-`, a
decimal point, but no digits.
* Produce a better error message for a nested property whose name starts with
`--`.
* Fix a crash when a selector ends in an escaped backslash.
* Add the relative length units from CSS Values 4 and CSS Contain 3 as known
units to validate bad computation in `calc`.
### Command Line Interface
* The `--watch` flag will now track loads through calls to `meta.load-css()` as
long as their URLs are literal strings without any interpolation.
## 1.57.1
* No user-visible changes.
## 1.57.0
* Add a `split($string, $separator, $limit: null)` function to `sass:string`
that splits a string into separate substrings based on a separator string.
### JavaScript API
* **Potentially breaking bug fix**: Custom functions in both the modern and
legacy API now properly reject signatures with whitespace between the function
name and parentheses.
* Custom functions in the legacy API now allow signatures with whitespace before
the function name, to match a bug in Node Sass.
### Dart API
* **Potentially breaking bug fix**: `Callable.fromSignature()` and
`AsyncCallable.fromSignature()` now reject signatures with whitespace between
the function name and parentheses.
## 1.56.2
### Embedded Sass
* The embedded compiler now supports version 1.2.0 of [the embedded
protocol](https://github.com/sass/embedded-protocol).
## 1.56.1
### Embedded Sass
* Importer results now validate that `contents` is actually a string and whether
`sourceMapUrl` is an absolute URL.
## 1.56.0
* **Potentially breaking change:** To match the CSS spec, SassScript expressions
beginning with `not` or `(` are no longer supported at the beginning of
parenthesized sections of media queries. For example,
```scss
@media (width >= 500px) and (not (grid))
```
will now be emitted unchanged, instead of producing
```scss
@media (width >= 500px) and (false)
```
See [the Sass website](https://sass-lang.com/d/media-logic) for details.
* **Potentially breaking bug fix:** Angle units like `rad` or `turn` are now
properly converted to equivalent `deg` values for `hsl()`, `hsla()`,
`adjust-hue()`, `color.adjust()`, and `color.change()`.
See [the Sass website](https://sass-lang.com/d/function-units#hue) for
details.
* Fix indentation for selectors that span multiple lines in a `@media` query.
* Emit a deprecation warning when passing `$alpha` values with units to
`color.adjust()` or `color.change()`. This will be an error in Dart Sass
2.0.0.
See [the Sass website](https://sass-lang.com/d/function-units#alpha) for
details.
* Emit a deprecation warning when passing a `$weight` value with no units or
with units other than `%` to `color.mix()`. This will be an error in Dart Sass
2.0.0.
See [the Sass website](https://sass-lang.com/d/function-units#weight) for
details.
* Emit a deprecation warning when passing `$n` values with units to `list.nth()`
or `list.set-nth()`. This will be an error in Dart Sass 2.0.0.
See [the Sass website](https://sass-lang.com/d/function-units#index) for
details.
* Improve existing deprecation warnings to wrap `/`-as-division suggestions in
`calc()` expressions.
* Properly mark the warning for passing numbers with units to `random()` as a
deprecation warning.
* Fix a bug where `@extend` could behave unpredicatably when used along with
`meta.load-css()` and shared modules that contained no CSS themselves but
loaded CSS from other modules.
### Dart API
* Emit a deprecation warning when passing a `sassIndex` with units to
`Value.sassIndexToListIndex()`. This will be an error in Dart Sass 2.0.0.
### JS API
* Importer results now validate whether `contents` is actually a string type.
* Importer result argument errors are now rendered correctly.
## 1.55.0
* **Potentially breaking bug fix:** Sass numbers are now universally stored as
64-bit floating-point numbers, rather than sometimes being stored as integers.
This will generally make arithmetic with very large numbers more reliable and
more consistent across platforms, but it does mean that numbers between nine
quadrillion and nine quintillion will no longer be represented with full
accuracy when compiling Sass on the Dart VM.
* **Potentially breaking bug fix:** Sass equality is now properly [transitive].
Two numbers are now considered equal (after doing unit conversions) if they
round to the same `1e-11`th. Previously, numbers were considered equal if they
were within `1e-11` of one another, which led to some circumstances where `$a
== $b` and `$b == $c` but `$a != $b`.
[transitive]: https://en.wikipedia.org/wiki/Transitive_property
* **Potentially breaking bug fix:** Various functions in `sass:math` no longer
treat floating-point numbers that are very close (but not identical) to
integers as integers. Instead, these functions now follow the floating-point
specification exactly. For example, `math.pow(0.000000000001, -1)` now returns
`1000000000000` instead of `Infinity`.
* Emit a deprecation warning for `$a -$b` and `$a +$b`, since these look like
they could be unary operations but they're actually parsed as binary
operations. Either explicitly write `$a - $b` or `$a (-$b)`. See
https://sass-lang.com/d/strict-unary for more details.
### Dart API
* Add an optional `argumentName` parameter to `SassScriptException()` to make it
easier to throw exceptions associated with particular argument names.
* Most APIs that previously returned `num` now return `double`. All APIs
continue to _accept_ `num`, although in Dart 2.0.0 these APIs will be changed
to accept only `double`.
### JS API
* Fix a bug in which certain warning spans would not have their properties
accessible by the JS API.
## 1.54.9
* Fix an incorrect span in certain `@media` query deprecation warnings.
## 1.54.8
* No user-visible changes.
## 1.54.7
* Add support for 32-bit ARM releases on Linux.
## 1.54.6
* Fix a bug where a `@media` query could be incorrectly omitted from a
stylesheet if it had multiple levels of nested `@media` queries within it
*and* the inner queries were mergeable but the outer query was not.
## 1.54.5
* Properly consider `a ~ c` to be a superselector of `a ~ b ~ c` and `a + b +
c`.
* Properly consider `b > c` to be a superselector of `a > b > c`, and similarly
for other combinators.
* Properly calculate specificity for selector pseudoclasses.
* Deprecate use of `random()` when `$limit` has units to make it explicit that
`random()` currently ignores units. A future version will no longer ignore
units.
* Don't throw an error when the same module is `@forward`ed multiple times
through a configured module.
### Embedded Sass
* Rather than downloading the embedded compiler for the local platform on
install, the `sass-embedded` npm package now declares optional dependencies on
platform-specific embedded compiler packages.
## 1.54.4
* Improve error messages when passing incorrect units that are also
out-of-bounds to various color functions.
## 1.54.3
* Release a native ARM64 executable for Mac OS.
## 1.54.2
* No user-visible changes.
## 1.54.1
* When unifying selectors for `@extend` and `selector.unify()`, ensure that
`:root`, `:scope`, `:host`, and `:host-context` only appear at the beginning
of complex selectors.
## 1.54.0
* Deprecate selectors with leading or trailing combinators, or with multiple
combinators in a row. If they're included in style rules after nesting is
resolved, Sass will now produce a deprecation warning and, in most cases, omit
the selector. Leading and trailing combinators can still be freely used for
nesting purposes.
See https://sass-lang.com/d/bogus-combinators for more details.
* Add partial support for new media query syntax from Media Queries Level 4. The
only exception are logical operations nested within parentheses, as these were
previously interpreted differently as SassScript expressions.
A parenthesized media condition that begins with `not` or an opening
parenthesis now produces a deprecation warning. In a future release, these
will be interpreted as plain CSS instead.
* Deprecate passing non-`deg` units to `color.hwb()`'s `$hue` argument.
* Fix a number of bugs when determining whether selectors with pseudo-elements
are superselectors.
* Treat `*` as a superselector of all selectors.
### Dart API
* Add a top-level `fakeFromImport()` function for testing custom importers
that use `AsyncImporter.fromImport`.
### JS API
* Add a `charset` option that controls whether or not Sass emits a
`@charset`/BOM for non-ASCII stylesheets.
* Fix Sass npm package types for TS 4.7+ Node16 and NodeNext module resolution.
## 1.53.0
* Add support for calling `var()` with an empty second argument, such as
`var(--side, )`.
### JS API
* Fix a bug where `meta.load-css()` would sometimes resolve relative URLs
incorrectly when called from a mixin using the legacy JS API.
### Embedded Sass
* Respect npm's proxy settings when downloading the embedded Sass compiler.
## 1.52.3
* Fix crash when trailing loud comments (`/* ... */`) appear twice in a row
across two different imports which themselves imported the same file each.
## 1.52.2
* Preserve location of trailing loud comments (`/* ... */`) instead of pushing
the comment to the next line.
## 1.52.1
### Command Line Interface
* Fix a bug where `--watch` mode would close immediately in TTY mode. This was
caused by our change to close `--watch` when stdin was closed *outside of* TTY
mode, which has been reverted for now while we work on a fix.
## 1.52.0
* Add support for arbitrary modifiers at the end of plain CSS imports, in
addition to the existing `supports()` and media queries. Sass now allows any
sequence of identifiers of functions after the URL of an import for forwards
compatibility with future additions to the CSS spec.
* Fix an issue where source locations tracked through variable references could
potentially become incorrect.
* Fix a bug where a loud comment in the source can break the source map when
embedding the sources, when using the command-line interface or the legacy JS
API.
### JS API
* `SassNumber.assertUnit()` and `SassNumber.assertNoUnits()` now correctly
return the number called on when it passes the assertion.
## 1.51.0
* **Potentially breaking change**: Change the order of maps returned by
`map.deep-merge()` to match those returned by `map.merge()`. All keys that
appeared in the first map will now be listed first in the same order they
appeared in that map, followed by any new keys added from the second map.
* Improve the string output of some AST nodes in error messages.
## 1.50.1
### Embedded Sass
* The JS embedded host and the embedded compiler will now properly avoid
resolving imports relative to the current working directory unless `'.'` is
passed as a load path.
* Fix a bug in the JS embedded host's implementation of the legacy JS API where
imports that began with `/` could crash on Windows.
## 1.50.0
* `@extend` now treats [`:where()`] the same as `:is()`.
[`:where()`]: https://developer.mozilla.org/en-US/docs/Web/CSS/:where
### Command Line Interface
* Closing the standard input stream will now cause the `--watch` command to stop
running.
### Embedded Sass
* Fix a bug where the JS embedded host crashed when invoking a legacy importer
after resolving a relative filesystem import.
* Improve error messages when returning non-`Object` values from legacy
importers.
## 1.49.11
* Add support for 64-bit ARM releases on Linux.
### Embedded Sass
* The embedded compiler now correctly sets the `id` field for all
`OutboundMessage`s.
## 1.49.10
* Quiet deps mode now silences compiler warnings in mixins and functions that
are defined in dependencies even if they're invoked from application
stylesheets.
* In expanded mode, Sass will now emit colors using `rgb()`, `rbga()`, `hsl()`,
and `hsla()` function notation if they were defined using the corresponding
notation. As per our browser support policy, this change was only done once
95% of browsers were confirmed to support this output format, and so is not
considered a breaking change.
Note that this output format is intended for human readability and not for
interoperability with other tools. As always, Sass targets the CSS
specification, and any tool that consumes Sass's output should parse all
colors that are supported by the CSS spec.
* Fix a bug in which a color written using the four- or eight-digit hex format
could be emitted as a hex color rather than a format with higher browser
compatibility.
* Calculations are no longer simplified within supports declarations
## 1.49.9
### Embedded Sass
* Fixed a bug where the legacy API could crash when passed an empty importer
list.
## 1.49.8
* Fixed a bug where some plain CSS imports would not be emitted.
### JS API
* Fix a bug where inspecting the Sass module in the Node.js console crashed on
Node 17.
### Embedded Sass
* Fix a bug where source map URLs were incorrectly generated when passing
importers to the legacy API.
## 1.49.7
### Embedded Sass
* First stable release the `sass-embedded` npm package that contains the Node.js
Embedded Host.
* First stable release of the `sass_embedded` pub package that contains the
Embedded Dart Sass compiler.
## 1.49.6
* No user-visible changes.
## 1.49.5
* No user-visible changes.
## 1.49.4
* No user-visible changes.
## 1.49.3
* No user-visible changes.
## 1.49.2
* No user-visible changes.
## 1.49.1
* Stop supporting non-LTS Node.js versions.
## 1.49.0
* Fix a bug in `string.insert` with certain negative indices.
### JS API
* Add support for the `sourceMapIncludeSources` option in the new JS API.
#### TypeScript Declarations
* Fix a bug where `LegacyPluginThis.options.linefeed` was typed to return
abbreviations when it actually returned literal linefeed characters.
## 1.48.0
### JS API
* **Potentially breaking bug fix:** Match the specification of the new JS API by
setting `LegacyResult.map` to `undefined` rather than `null`.
#### TypeScript Declarations
* Add a declaration for the `NULL` constant.
## 1.47.0
### JS API
#### TypeScript Declarations
* Add declarations for the `TRUE` and `FALSE` constants.
## 1.46.0
### JS API
* **Potentially breaking bug fix:** Match the specification of the new JS API by
passing `undefined` rather than `null` to `Logger.warn()` for an unset `span`.
#### TypeScript Declarations
* Add a declaration for the `LegacyPluginThis.options.context` field.
* Update the definition of `LegacyAsyncFunction` to include explicit definitions
with zero through six arguments before the `done` parameter. This makes it
possible for TypeScript users to pass in callbacks that take a specific number
of arguments, rather than having to declare a callback that takes an arbitrary
number.
* Add a declaration for `types.Error`, a legacy API class that can be returned
by asynchronous functions to signal asynchronous errors.
* Add a `LegacyAsyncFunctionDone` type for the `done` callback that's passed to
`LegacyAsyncFunction`.
## 1.45.2
### JS API
* **Potentially breaking bug fix:** Change the default value of the `separator`
parameter for `new SassArgumentList()` to `','` rather than `null`. This
matches the API specification.
## 1.45.1
* **Potentially breaking bug fix:** Properly parse custom properties in
`@supports` conditions. Note that this means that SassScript expressions on
the right-hand side of custom property `@supports` queries now need to be
interpolated, as per https://sass-lang.com/d/css-vars.
* **Potentially breaking bug fix:** Fix a bug where `inspect()` was not
properly printing nested, empty, bracketed lists.
## 1.45.0
### JS API
This release includes an entirely new JavaScript API, designed to be more
idiomatic, performant, and usable. The old API will continue to be supported
until Dart Sass 2.0.0, but it is now considered deprecated and should be avoided
for new code.
The new API includes:
* `compile()` and `compileAsync()` functions that take Sass file paths and
return the result of compiling them to CSS. The async function returns a
`Promise` rather than using a callback-based API.
* `compileString()` and `compileStringAsync()` functions that take a string of
Sass source and compiles it to CSS. As above, the async function returns a
`Promise`.
* A new importer API that more closely matches the Sass specification's logic
for resolving loads. This makes it much easier for Sass to cache information
across `@import` and `@use` rules, which substantially improves performance
for applications that rely heavily on repeated `@import`s.
* A new custom function API, including much more usable JS representations of
Sass value types complete with type-assertion functions, easy map and list
lookups, and compatibility with the [`immutable`] package. **Unlike in the
legacy API,** function callbacks now take one argument which contains an array
of Sass values (rather than taking a separate JS argument for each Sass
argument).
[`immutable`]: https://immutable-js.com/
For full documentation of this API, please see [the Sass website][js-api].
[js-api]: https://sass-lang.com/documentation/js-api
This release also adds TypeScript type definitions.
## 1.44.0
* Suggest `calc()` as an alternative in `/`-as-division deprecation messages.
### Dart API
* Add `SassNumber.convert()` and `SassNumber.convertValue()`. These work like
`SassNumber.coerce()` and `SassNumber.coerceValue()`, except they don't treat
unitless numbers as universally compatible.
* Fix a bug where `SassNumber.coerceToMatch()` and
`SassNumber.coerceValueToMatch()` wouldn't coerce single-unit numbers to
match unitless numbers.
## 1.43.5
* Fix a bug where calculations with different operators were incorrectly
considered equal.
* Properly parse attribute selectors with empty namespaces.
### JS API
* Print more detailed JS stack traces. This is mostly useful for the Sass team's
own debugging purposes.
## 1.43.4
### JS API
* Fix a bug where the `logger` option was ignored for the `render()` function.
## 1.43.3
* Improve performance.
## 1.43.2
* Improve the error message when the default namespace of a `@use` rule is not
a valid identifier.
## 1.43.1
* No user-visible changes.
## 1.43.0
### JS API
* Add support for the `logger` option. This takes an object that can define
`warn` or `debug` methods to add custom handling for messages emitted by the
Sass compiler. See [the JS API docs] for details.
[the JS API docs]: https://sass-lang.com/documentation/js-api/interfaces/Logger
* Add a `Logger.silent` object that can be passed to the `logger` option to
silence all messages from the Sass compiler.
## 1.42.1
* Fix a bug where Sass variables and function calls in calculations weren't
being resolved correctly if there was a parenthesized interpolation elsewhere
in the file.
## 1.42.0
* `min()` and `max()` expressions are once again parsed as calculations as long
as they contain only syntax that's allowed in calculation expressions. To
avoid the backwards-compatibility issues that were present in 1.40.0, they now
allow unitless numbers to be mixed with numbers with units just like the
global `min()` and `max()` functions. Similarly, `+` and `-` operations within
`min()` and `max()` functions allow unitless numbers to be mixed with numbers
with units.
## 1.41.1
* Preserve parentheses around `var()` functions in calculations, because they
could potentially be replaced with sub-expressions that might need to be
parenthesized.
## 1.41.0
* Calculation values can now be combined with strings using the `+` operator.
This was an error in 1.40.0, but this broke stylesheets that were relying on
`$value + ""` expressions to generically convert values to strings. (Note that
the Sass team recommends the use of `"#{$value}"` or `inspect($value)` for
that use-case.)
* The `selector.unify()` function now correctly returns `null` when one selector
is a `:host` or `:host-context` and the other is a selector that's guaranteed
to be within the current shadow DOM. The `@extend` logic has been updated
accordingly as well.
* Fix a bug where extra whitespace in `min()`, `max()`, `clamp()`, and `calc()`
expressions could cause bogus parse errors.
* Fix a bug where the right-hand operand of a `-` in a calculation could
incorrectly be stripped of parentheses.
### Dart API
* `SassCalculation.plus()` now allows `SassString` arguments.
## 1.40.1
* **Potentially breaking bug fix:** `min()` and `max()` expressions outside of
calculations now behave the same way they did in 1.39.2, returning unquoted
strings if they contain no Sass-specific features and calling the global
`min()` and `max()` functions otherwise. Within calculations, they continue to
behave how they did in 1.40.0.
This fixes an unintended breaking change added in 1.40.0, wherein passing a
unitless number and a number without units to `min()` or `max()` now produces
an error. Since this breakage affects a major Sass library, we're temporarily
reverting support for `min()` and `max()` calculations while we work on
designing a longer-term fix.
## 1.40.0
* Add support for first-class `calc()` expressions (as well as `clamp()` and
plain-CSS `min()` and `max()`). This means:
* `calc()` expressions will be parsed more thoroughly, and errors will be
highlighted where they weren't before. **This may break your stylesheets,**
but only if they were already producing broken CSS.
* `calc()` expressions will be simplified where possible, and may even return
numbers if they can be simplified away entirely.
* `calc()` expressions that can't be simplified to numbers return a new data
type known as "calculations".
* Sass variables and functions can now be used in `calc()` expressions.
* New functions `meta.calc-name()` and `meta.calc-args()` can now inspect
calculations.
### Dart API
* Add a new value type, `SassCalculation`, that represents calculations.
* Add new `CalculationOperation`, `CalculationOperator`, and
`CalculationInterpolation` types to represent types of arguments that may
exist as part of a calculation.
* Add a new `Value.assertCalculation()` method.
* Add a new `Number.hasCompatibleUnits()` method.
## 1.39.2
* Fix a bug where configuring with `@use ... with` would throw an error when
that variable was defined in a module that also contained `@forward ... with`.
## 1.39.1
* Partial fix for a bug where `@at-root` does not work properly in nested
imports that contain `@use` rules. If the only `@use` rules in the nested
import are for built-in modules, `@at-root` should now work properly.
## 1.39.0
### JS API
* Add a `charset` option that controls whether or not Sass emits a
`@charset`/BOM for non-ASCII stylesheets.
## 1.38.2
* No user-visible changes
## 1.38.1
* No user-visible changes
## 1.38.0
* In expanded mode, emit characters in Unicode private-use areas as escape
sequences rather than literal characters.
* Fix a bug where quotes would be omitted for an attribute selector whose value
was a single backslash.
* Properly consider numbers that begin with `.` as "plain CSS" for the purposes
of parsing plain-CSS `min()` and `max()` functions.
* Allow `if` to be used as an unquoted string.
* Properly parse backslash escapes within `url()` expressions.
* Fix a couple bugs where `@extend`s could be marked as unsatisfied when
multiple identical `@extend`s extended selectors across `@use` rules.
### Command Line Interface
* Strip CRLF newlines from snippets of the original stylesheet that are included
in the output when an error occurs.
### JS API
* Don't crash when a Windows path is returned by a custom Node importer at the
same time as file contents.
* Don't crash when an error occurs in a stylesheet loaded via a custom importer
with a custom URL scheme.
### Dart API
* Add a `SassArgumentList.keywordsWithoutMarking` getter to access the keyword
arguments of an argument list without marking them accessed.
## 1.37.5
* No user-visible changes.
## 1.37.4
* No user-visible changes.
## 1.37.3
* No user-visible changes.
## 1.37.2
* No user-visible changes.
## 1.37.1
* No user-visible changes.
## 1.37.0
### Dart API
* **Potentially breaking bug fix:** `SassNumber.asSlash`,
`SassNumber.withSlash()`, and `SassNumber.withoutSlash()` have been marked as
`@internal`. They were never intended to be used outside the `sass` package.
* **Potentially breaking bug fix:** `SassException` has been marked as `@sealed`
to formally indicate that it's not intended to be extended outside of the
`sass` package.
* Add a `Value.withListContents()` method that returns a new Sass list with the
same list separator and brackets as the current value, interpreted as a list.
## 1.36.0
### Dart API
* Added `compileToResult()`, `compileStringToResult()`,
`compileToResultAsync()`, and `compileStringToResultAsync()` methods. These
are intended to replace the existing `compile*()` methods, which are now
deprecated. Rather than returning a simple string, these return a
`CompileResult` object, which will allow us to add additional information
about the compilation without having to introduce further deprecations.
* Instead of passing a `sourceMaps` callback to `compile*()`, pass
`sourceMaps: true` to `compile*ToResult()` and access
`CompileResult.sourceMap`.
* The `CompileResult` object exposes a `loadedUrls` object which lists the
canonical URLs accessed during a compilation. This information was
previously unavailable except through the JS API.
## 1.35.2
* **Potentially breaking bug fix**: Properly throw an error for Unicode ranges
that have too many `?`s after hexadecimal digits, such as `U+12345??`.
* **Potentially breaking bug fix:** Fixed a bug where certain local variable
declarations nested within multiple `@if` statements would incorrectly
override a global variable. It's unlikely that any real stylesheets were
relying on this bug, but if so they can simply add `!global` to the variable
declaration to preserve the old behavior.
* **Potentially breaking bug fix:** Fix a bug where imports of root-relative
URLs (those that begin with `/`) in `@import` rules would be passed to
both Dart and JS importers as `file:` URLs.
* Properly support selector lists for the `$extendee` argument to
`selector.extend()` and `selector.replace()`.
* Fix an edge case where `@extend` wouldn't affect a selector within a
pseudo-selector such as `:is()` that itself extended other selectors.
* Fix a race condition where `meta.load-css()` could trigger an internal error
when running in asynchronous mode.
### Dart API
* Use the `@internal` annotation to indicate which `Value` APIs are available
for public use.
## 1.35.1
* Fix a bug where the quiet dependency flag didn't silence warnings in some
stylesheets loaded using `@import`.
## 1.35.0
* Fix a couple bugs that could prevent some members from being found in certain
files that use a mix of imports and the module system.
* Fix incorrect recommendation for migrating division expressions that reference
namespaced variables.
### JS API
* Add a `quietDeps` option which silences compiler warnings from stylesheets
loaded through importers and load paths.
* Add a `verbose` option which causes the compiler to emit all deprecation
warnings, not just 5 per feature.
## 1.34.1
* Fix a bug where `--update` would always compile any file that depends on a
built-in module.
* Fix the URL for the `@-moz-document` deprecation message.
* Fix a bug with `@for` loops nested inside property declarations.
## 1.34.0
* Don't emit the same warning in the same location multiple times.
* Cap deprecation warnings at 5 per feature by default.
### Command Line Interface
* Add a `--quiet-deps` flag which silences compiler warnings from stylesheets
loaded through `--load-path`s.
* Add a `--verbose` flag which causes the compiler to emit all deprecation
warnings, not just 5 per feature.
### Dart API
* Add a `quietDeps` argument to `compile()`, `compileString()`,
`compileAsync()`, and `compileStringAsync()` which silences compiler warnings
from stylesheets loaded through importers, load paths, and `package:` URLs.
* Add a `verbose` argument to `compile()`, `compileString()`, `compileAsync()`,
and `compileStringAsync()` which causes the compiler to emit all deprecation
warnings, not just 5 per feature.
## 1.33.0
* Deprecate the use of `/` for division. The new `math.div()` function should be
used instead. See [this page][] for details.
[this page]: https://sass-lang.com/documentation/breaking-changes/slash-div
* Add a `list.slash()` function that returns a slash-separated list.
* **Potentially breaking bug fix:** The heuristics around when potentially
slash-separated numbers are converted to slash-free numbers—for example, when
`1/2` will be printed as `0.5` rather than `1/2`—have been slightly expanded.
Previously, a number would be made slash-free if it was passed as an argument
to a *user-defined function*, but not to a *built-in function*. Now it will be
made slash-free in both cases. This is a behavioral change, but it's unlikely
to affect any real-world stylesheets.
* [`:is()`][] now behaves identically to `:matches()`.
[`:is()`]: https://developer.mozilla.org/en-US/docs/Web/CSS/:is
* Fix a bug where non-integer numbers that were very close to integer
values would be incorrectly formatted in CSS.
* Fix a bug where very small number and very large negative numbers would be
incorrectly formatted in CSS.
### JS API
* The `this` context for importers now has a `fromImport` field, which is `true`
if the importer is being invoked from an `@import` and `false` otherwise.
Importers should only use this to determine whether to load [import-only
files].
[import-only files]: https://sass-lang.com/documentation/at-rules/import#import-only-files
### Dart API
* Add an `Importer.fromImport` getter, which is `true` if the current
`Importer.canonicalize()` call comes from an `@import` rule and `false`
otherwise. Importers should only use this to determine whether to load
[import-only files].
## 1.32.13
* **Potentially breaking bug fix:** Null values in `@use` and `@forward`
configurations no longer override the `!default` variable, matching the
behavior of the equivalent code using `@import`.
* Use the proper parameter names in error messages about `string.slice`
## 1.32.12
* Fix a bug that disallowed more than one module from extending the same
selector from a module if that selector itself extended a selector from
another upstream module.
## 1.32.11
* Fix a bug where bogus indented syntax errors were reported for lines that
contained only whitespace.
## 1.32.10
* No user-visible changes.
## 1.32.9
* Fix a typo in a deprecation warning.
### JavaScript API
* Drop support for Chokidar 2.x. This version was incompatible with Node 14, but
due to shortcomings in npm's version resolver sometimes still ended up
installed anyway. Only declaring support for 3.0.0 should ensure compatibility
going forward.
### Dart API
* Allow the null safety release of args and watcher.
### Command Line Interface
* Add a `-w` shorthand for the `--watch` flag.
## 1.32.8
* Update chokidar version for Node API tests.
### JavaScript API
* Allow a custom function to access the `render()` options object within its
local context, as `this.options`.
## 1.32.7
* Allow the null safety release of stream_transform.
* Allow `@forward...with` to take arguments that have a `!default` flag without
a trailing comma.
* Improve the performance of unitless and single-unit numbers.
## 1.32.6
### Node JS API
* Fix Electron support when `nodeIntegration` is disabled.
### Dart API
* All range checks for `SassColor` constructors now throw `RangeError`s with
`start` and `end` set.
## 1.32.5
* **Potentially breaking bug fix:** When using `@for` with numbers that have
units, the iteration variable now matches the unit of the initial number. This
matches the behavior of Ruby Sass and LibSass.
### Node JS API
* Fix a few infrequent errors when calling `render()` with `fiber` multiple
times simultaneously.
* Avoid possible mangled error messages when custom functions or importers throw
unexpected exceptions.
* Fix Electron support when `nodeIntegration` is disabled.
## 1.32.4
* No user-visible changes.
## 1.32.3
* Optimize `==` for numbers that have different units.
## 1.32.2
* Print the actual number that was received in unit deprecation warnings for
color functions.
## 1.32.1
* Don't emit permissions errors on Windows and OS X when trying to determine the
real case of path names.
## 1.32.0
* Deprecate passing non-`%` numbers as lightness and saturation to `hsl()`,
`hsla()`, `color.adjust()`, and `color.change()`. This matches the CSS
specification, which also requires `%` for all lightness and saturation
parameters. See [the Sass website][color-units] for more details.
* Deprecate passing numbers with units other than `deg` as the hue to `hsl()`,
`hsla()`, `adjust-hue()`, `color.adjust()`, and `color.change()`. Unitless
numbers *are* still allowed here, since they're allowed by CSS. See [the Sass
website][color-units] for more details.
* Improve error messages about incompatible units.
* Properly mark some warnings emitted by `sass:color` functions as deprecation
warnings.
### Dart API
* Rename `SassNumber.valueInUnits()` to `SassNumber.coerceValue()`. The old name
remains, but is now deprecated.
* Rename `SassNumber.coerceValueToUnit()`, a shorthand for
`SassNumber.coerceValue()` that takes a single numerator unit.
* Add `SassNumber.coerceToMatch()` and `SassNumber.coerceValueToMatch()`, which
work like `SassNumber.coerce()` and `SassNumber.coerceValue()` but take a
`SassNumber` whose units should be matched rather than taking the units
explicitly. These generate better error messages than `SassNumber.coerce()`
and `SassNumber.coerceValue()`.
* Add `SassNumber.convertToMatch()` and `SassNumber.convertValueToMatch()`,
which work like `SassNumber.coerceToMatch()` and
`SassNumber.coerceValueToMatch()` except they throw exceptions when converting
unitless values to or from units.
* Add `SassNumber.compatibleWithUnit()`, which returns whether the number can be
coerced to a single numerator unit.
## 1.31.0
* Add support for parsing `clamp()` as a special math function, the same way
`calc()` is parsed.
* Properly load files in case-sensitive Windows directories with upper-case
names.
## 1.30.0
* Fix a bug where `@at-root (without: all)` wouldn't properly remove a
`@keyframes` context when parsing selectors.
### Node JS API
* The generated `main()` function in `sass.js` now returns a `Promise` that
completes when the executable is finished running.
### Dart API
* Fix a bug that prevented importers from returning null when loading from a
URL that they had already canonicalized.
## 1.29.0
* Support a broader syntax for `@supports` conditions, based on the latest
[Editor's Draft of CSS Conditional Rules 3]. Almost all syntax will be allowed
(with interpolation) in the conditions' parentheses, as well as function
syntax such as `@supports selector(...)`.
[Editor's Draft of CSS Conditional Rules 3]: https://drafts.csswg.org/css-conditional-3/#at-supports
## 1.28.0
* Add a [`color.hwb()`] function to `sass:color` that can express colors in [HWB] format.
[`color.hwb()`]: https://sass-lang.com/documentation/modules/color#hwb
[HWB]: https://en.wikipedia.org/wiki/HWB_color_model
* Add [`color.whiteness()`] and [`color.blackness()`] functions to `sass:color`
to get a color's [HWB] whiteness and blackness components.
[`color.whiteness()`]: https://sass-lang.com/documentation/modules/color#whiteness
[`color.blackness()`]: https://sass-lang.com/documentation/modules/color#blackness
* Add `$whiteness` and `$blackness` parameters to [`color.adjust()`],
[`color.change()`], and [`color.scale()`] to modify a color's [HWB] whiteness
and blackness components.
[`color.adjust()`]: https://sass-lang.com/documentation/modules/color#adjust
[`color.change()`]: https://sass-lang.com/documentation/modules/color#change
[`color.scale()`]: https://sass-lang.com/documentation/modules/color#scale
### Dart API
* Add [HWB] support to the `SassColor` class, including a `SassColor.hwb()`
constructor, `whiteness` and `blackness` getters, and a `changeHwb()` method.
[HWB]: https://en.wikipedia.org/wiki/HWB_color_model
## 1.27.2
* No user-visible changes.
## 1.27.1
* **Potentially breaking bug fix:** `meta.load-css()` now correctly uses the
name `$url` for its first argument, rather than `$module`.
* Don't crash when using `Infinity` or `NaN` as a key in a map.
* Emit a proper parse error for a `=` with no right-hand side in a function.
* Avoid going exponential on certain recursive `@extend` edge cases.
## 1.27.0
* Adds an overload to `map.merge()` that supports merging a nested map.
`map.merge($map1, $keys..., $map2)`: The `$keys` form a path to the nested map
in `$map1`, into which `$map2` gets merged.
See [the Sass documentation][map-merge] for more details.
[map-merge]: https://sass-lang.com/documentation/modules/map#merge
* Adds an overloaded `map.set()` function.
`map.set($map, $key, $value)`: Adds to or updates `$map` with the specified
`$key` and `$value`.
`map.set($map, $keys..., $value)`: Adds to or updates a map that is nested
within `$map`. The `$keys` form a path to the nested map in `$map`, into
which `$value` is inserted.
See [the Sass documentation][map-set] for more details.
[map-set]: https://sass-lang.com/documentation/modules/map#set
* Add support for nested maps to `map.get()`.
For example, `map.get((a: (b: (c: d))), a, b, c)` would return `d`.
See [the documentation][map-get] for more details.
[map-get]: https://sass-lang.com/documentation/modules/map#get
* Add support for nested maps in `map.has-key`.
For example, `map.has-key((a: (b: (c: d))), a, b, c)` would return true.
See [the documentation][map-has-key] for more details.
[map-has-key]: https://sass-lang.com/documentation/modules/map#has-key
* Add a `map.deep-merge()` function. This works like `map.merge()`, except that
nested map values are *also* recursively merged. For example:
```
map.deep-merge(
(color: (primary: red, secondary: blue),
(color: (secondary: teal)
) // => (color: (primary: red, secondary: teal))
```
See [the Sass documentation][map-deep-merge] for more details.
[map-deep-merge]: https://sass-lang.com/documentation/modules/map#deep-merge
* Add a `map.deep-remove()` function. This allows you to remove keys from
nested maps by passing multiple keys. For example:
```
map.deep-remove(
(color: (primary: red, secondary: blue)),
color, primary
) // => (color: (secondary: blue))
```
See [the Sass documentation][map-deep-remove] for more details.
[map-deep-remove]: https://sass-lang.com/documentation/modules/map#deep-remove
* Fix a bug where custom property values in plain CSS were being parsed as
normal property values.
### Dart API
* Add a `Value.tryMap()` function which returns the `Value` as a `SassMap` if
it's a valid map, or `null` otherwise. This allows function authors to safely
retrieve maps even if they're internally stored as empty lists, without having
to catch exceptions from `Value.assertMap()`.
## 1.26.12
* Fix a bug where nesting properties beneath a Sass-syntax custom property
(written as `#{--foo}: ...`) would crash.
## 1.26.11
* **Potentially breaking bug fix:** `selector.nest()` now throws an error
if the first arguments contains the parent selector `&`.
* Fixes a parsing bug with inline comments in selectors.
* Improve some error messages for edge-case parse failures.
* Throw a proper error when the same built-in module is `@use`d twice.
* Don't crash when writing `Infinity` in JS mode.
* Produce a better error message for positional arguments following named
arguments.
## 1.26.10
* Fixes a bug where two adjacent combinators could cause an error.
## 1.26.9
* Use an updated version of `node_preamble` when compiling to JS.
## 1.26.8
* Fixes an error when emitting source maps to stdout.
## 1.26.7
* No user-visible changes.
## 1.26.6
* Fix a bug where escape sequences were improperly recognized in `@else` rules.
### JavaScript API
* Add `sass.NULL`, `sass.TRUE`, and `sass.FALSE` constants to match Node Sass's
API.
* If a custom Node importer returns both `file` and `contents`, don't attempt to
read the `file`. Instead, use the `contents` provided by the importer, with
`file` as the canonical url.
## 1.26.5
* No user-visible changes.
## 1.26.4
* Be more memory-efficient when handling `@forward`s through `@import`s.
## 1.26.3
* Fix a bug where `--watch` mode could go into an infinite loop compiling CSS
files to themselves.
## 1.26.2
* More aggressively eliminate redundant selectors in the `selector.extend()` and
`selector.replace()` functions.
## 1.26.1
### Command Line Interface
* Fix a longstanding bug where `--watch` mode could enter into a state where
recompilation would not occur after a syntax error was introduced into a
dependency and then fixed.
## 1.26.0
* **Potentially breaking bug fix:** `@use` rules whose URLs' basenames begin
with `_` now correctly exclude that `_` from the rules' namespaces.
* Fix a bug where imported forwarded members weren't visible in mixins and
functions that were defined before the `@import`.
* Don't throw errors if the exact same member is loaded or forwarded from
multiple modules at the same time.
## 1.25.2
* Fix a bug where, under extremely rare circumstances, a valid variable could
become unassigned.
## 1.25.0
* Add functions to the built-in "sass:math" module.
* `clamp($min, $number, $max)`. Clamps `$number` in between `$min` and `$max`.
* `hypot($numbers...)`. Given *n* numbers, outputs the length of the
*n*-dimensional vector that has components equal to each of the inputs.
* Exponential. All inputs must be unitless.
* `log($number)` or `log($number, $base)`. If no base is provided, performs
a natural log.
* `pow($base, $exponent)`
* `sqrt($number)`
* Trigonometric. The input must be an angle. If no unit is given, the input is
assumed to be in `rad`.
* `cos($number)`
* `sin($number)`
* `tan($number)`
* Inverse trigonometric. The output is in `deg`.
* `acos($number)`. Input must be unitless.
* `asin($number)`. Input must be unitless.
* `atan($number)`. Input must be unitless.
* `atan2($y, $x)`. `$y` and `$x` must have compatible units or be unitless.
* Add the variables `$pi` and `$e` to the built-in "sass:math" module.
### JavaScript API
* `constructor.value` fields on value objects now match their Node Sass
equivalents.
## 1.24.5
* Highlight contextually-relevant sections of the stylesheet in error messages,
rather than only highlighting the section where the error was detected.
## 1.24.4
### JavaScript API
* Fix a bug where source map generation would crash with an absolute source map
path and a custom importer that returns string file contents.
## 1.24.3
### Command Line Interface
* Fix a bug where `sass --version` would crash for certain executable
distributions.
## 1.24.2
### JavaScript API
* Fix a bug introduced in the previous release that prevented custom importers
in Node.js from loading import-only files.
## 1.24.1
* Fix a bug where the wrong file could be loaded when the same URL is used by
both a `@use` rule and an `@import` rule.
## 1.24.0
* Add an optional `with` clause to the `@forward` rule. This works like the
`@use` rule's `with` clause, except that `@forward ... with` can declare
variables as `!default` to allow downstream modules to reconfigure their
values.
* Support configuring modules through `@import` rules.
## 1.23.8
* **Potentially breaking bug fix:** Members loaded through a nested `@import`
are no longer ever accessible outside that nested context.
* Don't throw an error when importing two modules that both forward members with
the same name. The latter name now takes precedence over the former, as per
the specification.
### Dart API
* `SassFormatException` now implements `SourceSpanFormatException` (and thus
`FormatException`).
## 1.23.7
* No user-visible changes
## 1.23.6
* No user-visible changes.
## 1.23.5
* Support inline comments in the indented syntax.
* When an overloaded function receives the wrong number of arguments, guess
which overload the user actually meant to invoke, and display the invalid
argument error for that overload.
* When `@error` is used in a function or mixin, print the call site rather than
the location of the `@error` itself to better match the behavior of calling a
built-in function that throws an error.
## 1.23.4
### Command-Line Interface
* Fix a bug where `--watch` wouldn't watch files referred to by `@forward`
rules.
## 1.23.3
* Fix a bug where selectors were being trimmed over-eagerly when `@extend`
crossed module boundaries.
## 1.23.2
### Command-Line Interface
* Fix a bug when compiling all Sass files in a directory where a CSS file could
be compiled to its own location, creating an infinite loop in `--watch` mode.
* Properly compile CSS entrypoints in directories outside of `--watch` mode.
## 1.23.1
* Fix a bug preventing built-in modules from being loaded within a configured
module.
* Fix a bug preventing an unconfigured module from being loaded from within two
different configured modules.
* Fix a bug when `meta.load-css()` was used to load some files that included
media queries.
* Allow `saturate()` in plain CSS files, since it can be used as a plain CSS
filter function.
* Improve the error messages for trying to access functions like `lighten()`
from the `sass:color` module.
## 1.23.0
* **Launch the new Sass module system!** This adds:
* The [`@use` rule][], which loads Sass files as *modules* and makes their
members available only in the current file, with automatic namespacing.
[`@use` rule]: https://sass-lang.com/documentation/at-rules/use
* The [`@forward` rule][], which makes members of another Sass file available
to stylesheets that `@use` the current file.
[`@forward` rule]: https://sass-lang.com/documentation/at-rules/forward
* Built-in modules named `sass:color`, `sass:list`, `sass:map`, `sass:math`,
`sass:meta`, `sass:selector`, and `sass:string` that provide access to all
the built-in Sass functions you know and love, with automatic module
namespaces.
* The [`meta.load-css()` mixin][], which includes the CSS contents of a module
loaded from a (potentially dynamic) URL.
[`meta.load-css()` mixin]: https://sass-lang.com/documentation/modules/meta#load-css
* The [`meta.module-variables()` function][], which provides access to the
variables defined in a given module.
[`meta.module-variables()` function]: https://sass-lang.com/documentation/modules/meta#module-variables
* The [`meta.module-functions()` function][], which provides access to the
functions defined in a given module.
[`meta.module-functions()` function]: https://sass-lang.com/documentation/modules/meta#module-functions
Check out [the Sass blog][migrator blog] for more information on the new
module system. You can also use the new [Sass migrator][] to automatically
migrate your stylesheets to the new module system!
[migrator blog]: https://sass-lang.com/blog/the-module-system-is-launched
[Sass migrator]: https://sass-lang.com/documentation/cli/migrator
## 1.22.12
* **Potentially breaking bug fix:** character sequences consisting of two or
more hyphens followed by a number (such as `--123`), or two or more hyphens on
their own (such as `--`), are now parsed as identifiers [in accordance with
the CSS spec][ident-token-diagram].
[ident-token-diagram]: https://drafts.csswg.org/css-syntax-3/#ident-token-diagram
The sequence `--` was previously parsed as multiple applications of the `-`
operator. Since this is unlikely to be used intentionally in practice, we
consider this bug fix safe.
### Command-Line Interface
* Fix a bug where changes in `.css` files would be ignored in `--watch` mode.
### JavaScript API
* Allow underscore-separated custom functions to be defined.
* Improve the performance of Node.js compilation involving many `@import`s.
## 1.22.11
* Don't try to load unquoted plain-CSS indented-syntax imports.
* Fix a couple edge cases in `@extend` logic and related selector functions:
* Recognize `:matches()` and similar pseudo-selectors as superselectors of
matching complex selectors.
* Recognize `::slotted()` as a superselector of other `::slotted()` selectors.
* Recognize `:current()` with a vendor prefix as a superselector.
## 1.22.10
* Fix a bug in which `get-function()` would fail to find a dash-separated
function when passed a function name with underscores.
## 1.22.9
* Include argument names when reporting range errors and selector parse errors.
* Avoid double `Error:` headers when reporting selector parse errors.
* Clarify the error message when the wrong number of positional arguments are
passed along with a named argument.
### JavaScript API
* Re-add support for Node Carbon (8.x).
## 1.22.8
### JavaScript API
* Don't crash when running in a directory whose name contains URL-sensitive
characters.
* Drop support for Node Carbon (8.x), which doesn't support `url.pathToFileURL`.
## 1.22.7
* Restrict the supported versions of the Dart SDK to `^2.4.0`.
## 1.22.6
* **Potentially breaking bug fix:** The `keywords()` function now converts
underscore-separated argument names to hyphen-separated names. This matches
LibSass's behavior, but not Ruby Sass's.
* Further improve performance for logic-heavy stylesheets.
* Improve a few error messages.
## 1.22.5
### JavaScript API
* Improve performance for logic-heavy stylesheets.
## 1.22.4
* Fix a bug where at-rules imported from within a style rule would appear within
that style rule rather than at the root of the document.
## 1.22.3
* **Potentially breaking bug fix:** The argument name for the `saturate()`
function is now `$amount`, to match the name in LibSass and originally in Ruby
Sass.
* **Potentially breaking bug fix:** The `invert()` function now properly returns
`#808080` when passed `$weight: 50%`. This matches the behavior in LibSass and
originally in Ruby Sass, as well as being consistent with other nearby values
of `$weight`.
* **Potentially breaking bug fix:** The `invert()` function now throws an error
if it's used [as a plain CSS function][plain-CSS invert] *and* the Sass-only
`$weight` parameter is passed. This never did anything useful, so it's
considered a bug fix rather than a full breaking change.
[plain-CSS invert]: https://developer.mozilla.org/en-US/docs/Web/CSS/filter-function/invert
* **Potentially breaking bug fix**: The `str-insert()` function now properly
inserts at the end of the string if the `$index` is `-1`. This matches the
behavior in LibSass and originally in Ruby Sass.
* **Potentially breaking bug fix**: An empty map returned by `map-remove()` is
now treated as identical to the literal value `()`, rather than being treated
as though it had a comma separator. This matches the original behavior in Ruby
Sass.
* The `adjust-color()` function no longer throws an error when a large `$alpha`
value is combined with HSL adjustments.
* The `alpha()` function now produces clearer error messages when the wrong
number of arguments are passed.
* Fix a bug where the `str-slice()` function could produce invalid output when
passed a string that contains characters that aren't represented as a single
byte in UTF-16.
* Improve the error message for an unknown separator name passed to the `join()`
or `append()` functions.
* The `zip()` function no longer deadlocks if passed no arguments.
* The `map-remove()` function can now take a `$key` named argument. This matches
the signature in LibSass and originally in Ruby Sass.
## 1.22.2
### JavaScript API
* Avoid re-assigning the `require()` function to make the code statically
analyzable by Webpack.
## 1.22.1
### JavaScript API
* Expand the dependency on `chokidar` to allow 3.x.
## 1.22.0
* Produce better stack traces when importing a file that contains a syntax
error.
* Make deprecation warnings for `!global` variable declarations that create new
variables clearer, especially in the case where the `!global` flag is
unnecessary because the variables are at the top level of the stylesheet.
### Dart API
* Add a `Value.realNull` getter, which returns Dart's `null` if the value is
Sass's null.
## 1.21.0
### Dart API
* Add a `sass` executable when installing the package through `pub`.
* Add a top-level `warn()` function for custom functions and importers to print
warning messages.
## 1.20.3
* No user-visible changes.
## 1.20.2
* Fix a bug where numbers could be written using exponential notation in
Node.js.
* Fix a crash that would appear when writing some very large integers to CSS.
### Command-Line Interface
* Improve performance for stand-alone packages on Linux and Mac OS.
### JavaScript API
* Pass imports to custom importers before resolving them using `includePaths` or
the `SASS_PATH` environment variable. This matches Node Sass's behavior, so
it's considered a bug fix.
## 1.20.1
* No user-visible changes.
## 1.20.0
* Support attribute selector modifiers, such as the `i` in `[title="test" i]`.
### Command-Line Interface
* When compilation fails, Sass will now write the error message to the CSS
output as a comment and as the `content` property of a `body::before` rule so
it will show up in the browser (unless compiling to standard output). This can
be disabled with the `--no-error-css` flag, or forced even when compiling to
standard output with the `--error-css` flag.
### Dart API
* Added `SassException.toCssString()`, which returns the contents of a CSS
stylesheet describing the error, as above.
## 1.19.0
* Allow `!` in `url()`s without quotes.
### Dart API
* `FilesystemImporter` now doesn't change its effective directory if the working
directory changes, even if it's passed a relative argument.
## 1.18.0
* Avoid recursively listing directories when finding the canonical name of a
file on case-insensitive filesystems.
* Fix importing files relative to `package:`-imported files.
* Don't claim that "package:" URLs aren't supported when they actually are.
### Command-Line Interface
* Add a `--no-charset` flag. If this flag is set, Sass will never emit a
`@charset` declaration or a byte-order mark, even if the CSS file contains
non-ASCII characters.
### Dart API
* Add a `charset` option to `compile()`, `compileString()`, `compileAsync()` and
`compileStringAsync()`. If this option is set to `false`, Sass will never emit
a `@charset` declaration or a byte-order mark, even if the CSS file contains
non-ASCII characters.
* Explicitly require that importers' `canonicalize()` methods be able to take
paths relative to their outputs as valid inputs. This isn't considered a
breaking change because the importer infrastructure already required this in
practice.
## 1.17.4
* Consistently parse U+000C FORM FEED, U+000D CARRIAGE RETURN, and sequences of
U+000D CARRIAGE RETURN followed by U+000A LINE FEED as individual newlines.
### JavaScript API
* Add a `sass.types.Error` constructor as an alias for `Error`. This makes our
custom function API compatible with Node Sass's.
## 1.17.3
* Fix an edge case where slash-separated numbers were written to the stylesheet
with a slash even when they're used as part of another arithmetic operation,
such as being concatenated with a string.
* Don't put style rules inside empty `@keyframes` selectors.
## 1.17.2
* Deprecate `!global` variable assignments to variables that aren't yet defined.
This deprecation message can be avoided by assigning variables to `null` at
the top level before globally assigning values to them.
### Dart API
* Explicitly mark classes that were never intended to be subclassed or
implemented as "sealed".
## 1.17.1
* Properly quote attribute selector values that start with identifiers but end
with a non-identifier character.
## 1.17.0
* Improve error output, particularly for errors that cover multiple lines.
* Improve source locations for some parse errors. Rather than pointing to the
next token that wasn't what was expected, they point *after* the previous
token. This should generally provide more context for the syntax error.
* Produce a better error message for style rules that are missing the closing
`}`.
* Produce a better error message for style rules and property declarations
within `@function` rules.
### Command-Line Interface
* Passing a directory on the command line now compiles all Sass source files in
the directory to CSS files in the same directory, as though `dir:dir` were
passed instead of just `dir`.
* The new error output uses non-ASCII Unicode characters by default. Add a
`--no-unicode` flag to disable this.
## 1.16.1
* Fix a performance bug where stylesheet evaluation could take a very long time
when many binary operators were used in sequence.
## 1.16.0
* `rgb()` and `hsl()` now treat unquoted strings beginning with `env()`,
`min()`, and `max()` as special number strings like `calc()`.
## 1.15.3
* Properly merge `all and` media queries. These queries were previously being
merged as though `all` referred to a specific media type, rather than all
media types.
* Never remove units from 0 values in compressed mode. This wasn't safe in
general, since some properties (such as `line-height`) interpret `0` as a
`<number>` rather than a `<length>` which can break CSS transforms. It's
better to do this optimization in a dedicated compressor that's aware of CSS
property semantics.
* Match Ruby Sass's behavior in some edge-cases involving numbers with many
significant digits.
* Emit escaped tab characters in identifiers as `\9` rather than a backslash
followed by a literal tab.
### Command-Line Interface
* The source map generated for a stylesheet read from standard input now uses a
`data:` URL to include that stylesheet's contents in the source map.
### Node JS API
* `this.includePaths` for a running importer is now a `;`-separated string on
Windows, rather than `:`-separated. This matches Node Sass's behavior.
### Dart API
* The URL used in a source map to refer to a stylesheet loaded from an importer
is now `ImportResult.sourceMapUrl` as documented.
## 1.15.2
### Node JS API
* When `setValue()` is called on a Sass string object, make it unquoted even if
it was quoted originally, to match the behavior of Node Sass.
## 1.15.1
* Always add quotes to attribute selector values that begin with `--`, since IE
11 doesn't consider them to be identifiers.
## 1.15.0
* Add support for passing arguments to `@content` blocks. See [the
proposal][content-args] for details.
* Add support for the new `rgb()` and `hsl()` syntax introduced in CSS Colors
Level 4, such as `rgb(0% 100% 0% / 0.5)`. See [the proposal][color-4-rgb-hsl]
for more details.
* Add support for interpolation in at-rule names. See [the
proposal][at-rule-interpolation] for details.
* Add paths from the `SASS_PATH` environment variable to the load paths in the
command-line interface, Dart API, and JS API. These load paths are checked
just after the load paths explicitly passed by the user.
* Allow saturation and lightness values outside of the `0%` to `100%` range in
the `hsl()` and `hsla()` functions. They're now clamped to be within that
range rather than producing an error if they're outside it.
* Properly compile selectors that end in escaped whitespace.
[content-args]: https://github.com/sass/language/blob/master/accepted/content-args.md
[color-4-rgb-hsl]: https://github.com/sass/language/blob/master/accepted/color-4-rgb-hsl.md
[at-rule-interpolation]: https://github.com/sass/language/blob/master/accepted/at-rule-interpolation.md
### JavaScript API
* Always include the error location in error messages.
## 1.14.4
* Properly escape U+0009 CHARACTER TABULATION in unquoted strings.
## 1.14.3
* Treat `:before`, `:after`, `:first-line`, and `:first-letter` as
pseudo-elements for the purposes of `@extend`.
* When running in compressed mode, remove spaces around combinators in complex
selectors, so a selector like `a > b` is output as `a>b`.
* Properly indicate the source span for errors involving binary operation
expressions whose operands are parenthesized.
## 1.14.2
* Fix a bug where loading the same stylesheet from two different import paths
could cause its imports to fail to resolve.
* Properly escape U+001F INFORMATION SEPARATOR ONE in unquoted strings.
### Command-Line Interface
* Don't crash when using `@debug` in a stylesheet passed on standard input.
### Dart API
* `AsyncImporter.canonicalize()` and `Importer.canonicalize()` must now return
absolute URLs. Relative URLs are still supported, but are deprecated and will
be removed in a future release.
## 1.14.1
* Canonicalize escaped digits at the beginning of identifiers as hex escapes.
* Properly parse property declarations that are both *in* content blocks and
written *after* content blocks.
### Command-Line Interface
* Print more readable paths in `--watch` mode.
## 1.14.0
### BREAKING CHANGE
In accordance with our [compatibility policy][], breaking changes made for CSS
compatibility reasons are released as minor version revision after a three-month
deprecation period.
[compatibility policy]: README.md#compatibility-policy
* Tokens such as `#abcd` that are now interpreted as hex colors with alpha
channels, rather than unquoted ID strings.
## 1.13.4
### Node JS
* Tweak JS compilation options to substantially improve performance.
## 1.13.3
* Properly generate source maps for stylesheets that emit `@charset`
declarations.
### Command-Line Interface
* Don't error out when passing `--embed-source-maps` along with
`--embed-sources` for stylesheets that contain non-ASCII characters.
## 1.13.2
* Properly parse `:nth-child()` and `:nth-last-child()` selectors with
whitespace around the argument.
* Don't emit extra whitespace in the arguments for `:nth-child()` and
`:nth-last-child()` selectors.
* Fix support for CSS hacks in plain CSS mode.
## 1.13.1
* Allow an IE-style single equals operator in plain CSS imports.
## 1.13.0
* Allow `@extend` to be used with multiple comma-separated simple selectors.
This is already supported by other implementations, but fell through the
cracks for Dart Sass until now.
* Don't crash when a media rule contains another media rule followed by a style
rule.
## 1.12.0
### Dart API
* Add a `SassException` type that provides information about Sass compilation
failures.
### Node JS API
* Remove the source map comment from the compiled JS. We don't ship with the
source map, so this pointed to nothing.
## 1.11.0
* Add support for importing plain CSS files. They can only be imported *without*
an extension—for example, `@import "style"` will import `style.css`. Plain CSS
files imported this way only support standard CSS features, not Sass
extensions.
See [the proposal][css-import] for details.
* Add support for CSS's `min()` and `max()` [math functions][]. A `min()` and
`max()` call will continue to be parsed as a Sass function if it involves any
Sass-specific features like variables or function calls, but if it's valid
plain CSS (optionally with interpolation) it will be emitted as plain CSS instead.
See [the proposal][css-min-max] for details.
* Add support for range-format media features like `(10px < width < 100px)`. See
[the proposal][media-ranges] for details.
* Normalize escape codes in identifiers so that, for example, `éclair` and
`\E9clair` are parsed to the same value. See
[the proposal][identifier-escapes] for details.
* Don't choke on a [byte-order mark][] at the beginning of a document when
running in JavaScript.
[math functions]: https://drafts.csswg.org/css-values/#math-function
[css-import]: https://github.com/sass/language/blob/master/accepted/css-imports.md
[css-min-max]: https://github.com/sass/language/blob/master/accepted/min-max.md
[media-ranges]: https://github.com/sass/language/blob/master/accepted/media-ranges.md
[identifier-escapes]: https://github.com/sass/language/blob/master/accepted/identifier-escapes.md
[byte-order mark]: https://en.wikipedia.org/wiki/Byte_order_mark
### Command-Line Interface
* The `--watch` command now continues to recompile a file after a syntax error
has been detected.
### Dart API
* Added a `Syntax` enum to indicate syntaxes for Sass source files.
* The `compile()` and `compileAsync()` functions now parse files with the `.css`
extension as plain CSS.
* Added a `syntax` parameter to `compileString()` and `compileStringAsync()`.
* Deprecated the `indented` parameter to `compileString()` and `compileStringAsync()`.
* Added a `syntax` parameter to `new ImporterResult()` and a
`ImporterResult.syntax` getter to set the syntax of the source file.
* Deprecated the `indented` parameter to `new ImporterResult()` and the
`ImporterResult.indented` getter in favor of `syntax`.
## 1.10.4
### Command-Line Interface
* Fix a Homebrew installation failure.
## 1.10.3
### Command-Line Interface
* Run the Chocolatey script with the correct arguments so it doesn't crash.
## 1.10.2
* No user-visible changes.
## 1.10.1
### Node JS API
* Don't crash when passing both `includePaths` and `importer`.
## 1.10.0
* When two `@media` rules' queries can't be merged, leave nested rules in place
for browsers that support them.
* Fix a typo in an error message.
## 1.9.2
### Node JS API
* Produce more readable filesystem errors, such as when a file doesn't exist.
## 1.9.1
### Command-Line Interface
* Don't emit ANSI codes to Windows terminals that don't support them.
* Fix a bug where `--watch` crashed on Mac OS.
## 1.9.0
### Node API
* Add support for `new sass.types.Color(argb)` for creating colors from ARGB hex
numbers. This was overlooked when initially adding support for Node Sass's
JavaScript API.
## 1.8.0
### Command-Line Interface
* Add a `--poll` flag to make `--watch` mode repeatedly check the filesystem for
updates rather than relying on native filesystem notifications.
* Add a `--stop-on-error` flag to stop compiling additional files once an error
is encountered.
## 1.7.3
* No user-visible changes.
## 1.7.2
* Add a deprecation warning for `@-moz-document`, except for cases where only an
empty `url-prefix()` is used. Support is [being removed from Firefox][] and
will eventually be removed from Sass as well.
[being removed from Firefox]: https://www.fxsitecompat.com/en-CA/docs/2018/moz-document-support-has-been-dropped-except-for-empty-url-prefix/
* Fix a bug where `@-moz-document` functions with string arguments weren't being
parsed.
### Command-Line Interface
* Don't crash when a syntax error is added to a watched file.
## 1.7.1
* Fix crashes in released binaries.
## 1.7.0
* Emit deprecation warnings for tokens such as `#abcd` that are ambiguous
between ID strings and hex colors with alpha channels. These will be
interpreted as colors in a release on or after 19 September 2018.
* Parse unambiguous hex colors with alpha channels as colors.
* Fix a bug where relative imports from files on the load path could look in the
incorrect location.
## 1.6.2
### Command-Line Interface
* Fix a bug where the source map comment in the generated CSS could refer to the
source map file using an incorrect URL.
## 1.6.1
* No user-visible changes.
## 1.6.0
* Produce better errors when expected tokens are missing before a closing brace.
* Avoid crashing when compiling a non-partial stylesheet that exists on the
filesystem next to a partial with the same name.
### Command-Line Interface
* Add support for the `--watch`, which watches for changes in Sass files on the
filesystem and ensures that the compiled CSS is up-to-date.
* When using `--update`, surface errors when an import doesn't exist even if the
file containing the import hasn't been modified.
* When compilation fails, delete the output file rather than leaving an outdated
version.
## 1.5.1
* Fix a bug where an absolute Windows path would be considered an `input:output`
pair.
* Forbid custom properties that have no values, like `--foo:;`, since they're
forbidden by the CSS spec.
## 1.5.0
* Fix a bug where an importer would be passed an incorrectly-resolved URL when
handling a relative import.
* Throw an error when an import is ambiguous due to a partial and a non-partial
with the same name, or multiple files with different extensions. This matches
the standard Sass behavior.
### Command-Line Interface
* Add an `--interactive` flag that supports interactively running Sass
expressions (thanks to [Jen Thakar][]!).
[Jen Thakar]: https://github.com/jathak
## 1.4.0
* Improve the error message for invalid semicolons in the indented syntax.
* Properly disallow semicolons after declarations in the indented syntax.
### Command-Line Interface
* Add support for compiling multiple files at once by writing
`sass input.scss:output.css`. Note that unlike Ruby Sass, this *always*
compiles files by default regardless of when they were modified.
This syntax also supports compiling entire directories at once. For example,
`sass templates/stylesheets:public/css` compiles all non-partial Sass files
in `templates/stylesheets` to CSS files in `public/css`.
* Add an `--update` flag that tells Sass to compile only stylesheets that have
been (transitively) modified since the CSS file was generated.
### Dart API
* Add `Importer.modificationTime()` and `AsyncImporter.modificationTime()` which
report the last time a stylesheet was modified.
### Node API
* Generate source maps when the `sourceMaps` option is set to a string and the
`outFile` option is not set.
## 1.3.2
* Add support for `@elseif` as an alias of `@else if`. This is not an
intentional feature, so using it will cause a deprecation warning. It will be
removed at some point in the future.
## 1.3.1
### Node API
* Fix loading imports relative to stylesheets that were themselves imported
though relative include paths.
## 1.3.0
### Command-Line Interface
* Generate source map files by default when writing to disk. This can be
disabled by passing `--no-source-map`.
* Add a `--source-map-urls` option to control whether the source file URLs in
the generated source map are relative or absolute.
* Add an `--embed-sources` option to embed the contents of all source files in
the generated source map.
* Add an `--embed-source-map` option to embed the generated source map as a
`data:` URL in the generated CSS.
### Dart API
* Add a `sourceMap` parameter to `compile()`, `compileString()`,
`compileAsync()`, and `compileStringAsync()`. This takes a callback that's
called with a [`SingleMapping`][] that contains the source map information for
the compiled CSS file.
[`SingleMapping`]: https://www.dartdocs.org/documentation/source_maps/latest/source_maps.parser/SingleMapping-class.html
### Node API
* Added support for the `sourceMap`, `omitSourceMapUrl`, `outFile`,
`sourceMapContents`, `sourceMapEmbed`, and `sourceMapRoot` options to
`render()` and `renderSync()`.
* Fix a bug where passing a relative path to `render()` or `renderSync()` would
cause relative imports to break.
* Fix a crash when printing warnings in stylesheets compiled using `render()` or
`renderSync()`.
* Fix a bug where format errors were reported badly on Windows.
## 1.2.1
* Always emit units in compressed mode for `0` dimensions other than lengths and
angles.
## 1.2.0
* The command-line executable will now create the directory for the resulting
CSS if that directory doesn't exist.
* Properly parse `#{$var} -#{$var}` as two separate values in a list rather than
one value being subtracted from another.
* Improve the error message for extending compound selectors.
## 1.1.1
* Add a commit that was accidentally left out of 1.1.0.
## 1.1.0
* The command-line executable can now be used to write an output file to disk
using `sass input.scss output.css`.
* Use a POSIX-shell-compatible means of finding the location of the `sass` shell
script.
## 1.0.0
**Initial stable release.**
### Changes Since 1.0.0-rc.1
* Allow `!` in custom property values ([#260][]).
[#260]: https://github.com/sass/dart-sass/issues/260
#### Dart API
* Remove the deprecated `render()` function.
#### Node API
* Errors are now subtypes of the `Error` type.
* Allow both the `data` and `file` options to be passed to `render()` and
`renderSync()` at once. The `data` option will be used as the contents of the
stylesheet, and the `file` option will be used as the path for error reporting
and relative imports. This matches Node Sass's behavior.
## 1.0.0-rc.1
* Add support for importing an `_index.scss` or `_index.sass` file when
importing a directory.
* Add a `--load-path` command-line option (alias `-I`) for passing additional
paths to search for Sass files to import.
* Add a `--quiet` command-line option (alias `-q`) for silencing warnings.
* Add an `--indented` command-line option for using the indented syntax with a
stylesheet from standard input.
* Don't merge the media queries `not type` and `(feature)`. We had previously
been generating `not type and (feature)`, but that's not actually the
intersection of the two queries.
* Don't crash on `$x % 0`.
* The standalone executable distributed on GitHub is now named `sass` rather
than `dart-sass`. The `dart-sass` executable will remain, with a deprecation
message, until 1.0.0 is released.
### Dart API
* Add a `Logger` class that allows users to control how messages are printed by
stylesheets.
* Add a `logger` parameter to `compile()`, `compileAsync()`, `compileString()`,
and `compileStringAsync()`.
### Node JS API
* Import URLs passed to importers are no longer normalized. For example, if a
stylesheet contains `@import "./foo.scss"`, importers will now receive
`"./foo.scss"` rather than `"foo.scss"`.
## 1.0.0-beta.5.3
* Support hard tabs in the indented syntax.
* Improve the formatting of comments that don't start on the same line as the
opening `/*`.
* Preserve whitespace after `and` in media queries in compressed mode.
### Indented Syntax
* Properly parse multi-line selectors.
* Don't deadlock on `/*` comments.
* Don't add an extra `*/` to comments that already have it.
* Preserve empty lines in `/*` comments.
## 1.0.0-beta.5.2
* Fix a bug where some colors would crash `compressed` mode.
## 1.0.0-beta.5.1
* Add a `compressed` output style.
* Emit a warning when `&&` is used, since it's probably not what the user means.
* `round()` now returns the correct results for negative numbers that should
round down.
* `var()` may now be passed in place of multiple arguments to `rgb()`, `rgba()`,
`hsl()` and `hsla()`.
* Fix some cases where equivalent numbers wouldn't count as the same keys in
maps.
* Fix a bug where multiplication like `(1/1px) * (1px/1)` wouldn't properly
cancel out units.
* Fix a bug where dividing by a compatible unit would produce an invalid
result.
* Remove a non-`sh`-compatible idiom from the standalone shell script.
### Dart API
* Add a `functions` parameter to `compile()`, `compleString()`,
`compileAsync()`, and `compileStringAsync()`. This allows users to define
custom functions in Dart that can be invoked from Sass stylesheets.
* Expose the `Callable` and `AsyncCallable` types, which represent functions
that can be invoked from Sass.
* Expose the `Value` type and its subclasses, as well as the top-level
`sassTrue`, `sassFalse`, and `sassNull` values, which represent Sass values
that may be passed into or returned from custom functions.
* Expose the `OutputStyle` enum, and add a `style` parameter to `compile()`,
`compleString()`, `compileAsync()`, and `compileStringAsync()` that allows
users to control the output style.
### Node JS API
* Support the `functions` option.
* Support the `"compressed"` value for the `outputStyle` option.
## 1.0.0-beta.4
* Support unquoted imports in the indented syntax.
* Fix a crash when `:not(...)` extends a selector that appears in
`:not(:not(...))`.
### Node JS API
* Add support for asynchronous importers to `render()` and `renderSync()`.
### Dart API
* Add `compileAsync()` and `compileStringAsync()` methods. These run
asynchronously, which allows them to take asynchronous importers (see below).
* Add an `AsyncImporter` class. This allows imports to be resolved
asynchronously in case no synchronous APIs are available. `AsyncImporter`s are
only compatible with `compileAysnc()` and `compileStringAsync()`.
## 1.0.0-beta.3
* Properly parse numbers with exponents.
* Don't crash when evaluating CSS variables whose names are entirely
interpolated (for example, `#{--foo}: ...`).
### Node JS API
* Add support for the `importer` option to `render()` and `renderSync()`.
Only synchronous importers are currently supported.
### Dart API
* Added an `Importer` class. This can be extended by users to provide support
for custom resolution for `@import` rules.
* Added built-in `FilesystemImporter` and `PackageImporter` implementations that
support resolving `file:` and `package:` URLs, respectively.
* Added an `importers` argument to the `compile()` and `compileString()`
functions that provides `Importer`s to use when resolving `@import` rules.
* Added a `loadPaths` argument to the `compile()` and `compileString()`
functions that provides paths to search for stylesheets when resolving
`@import` rules. This is a shorthand for passing `FilesystemImporter`s to the
`importers` argument.
## 1.0.0-beta.2
* Add support for the `::slotted()` pseudo-element.
* Generated transparent colors will now be emitted as `rgba(0, 0, 0, 0)` rather
than `transparent`. This works around a bug wherein IE incorrectly handles the
latter format.
### Command-Line Interface
* Improve the logic for whether to use terminal colors by default.
### Node JS API
* Add support for `data`, `includePaths`, `indentedSyntax`, `lineFeed`,
`indentWidth`, and `indentType` options to `render()` and `renderSync()`.
* The result object returned by `render()` and `renderSync()` now includes the
`stats` object which provides metadata about the compilation process.
* The error object thrown by `render()` and `renderSync()` now includes `line`,
`column`, `file`, `status`, and `formatted` fields. The `message` field and
`toString()` also provide more information.
### Dart API
* Add a `renderString()` method for rendering Sass source that's not in a file
on disk.
## 1.0.0-beta.1
* Drop support for the reference combinator. This has been removed from the
spec, and will be deprecated and eventually removed in other implementations.
* Trust type annotations when compiling to JavaScript, which makes it
substantially faster.
* Compile to minified JavaScript, which decreases the code size substantially
and makes startup a little faster.
* Fix a crash when inspecting a string expression that ended in "\a".
* Fix a bug where declarations and `@extend` were allowed outside of a style
rule in certain circumstances.
* Fix `not` in parentheses in `@supports` conditions.
* Allow `url` as an identifier name.
* Properly parse `/***/` in selectors.
* Properly parse unary operators immediately after commas.
* Match Ruby Sass's rounding behavior for all functions.
* Allow `\` at the beginning of a selector in the indented syntax.
* Fix a number of `@extend` bugs:
* `selector-extend()` and `selector-replace()` now allow compound selector
extendees.
* Remove the universal selector `*` when unifying with other selectors.
* Properly unify the result of multiple simple selectors in the same compound
selector being extended.
* Properly handle extensions being extended.
* Properly follow the [first law of `@extend`][laws].
* Fix selector specificity tracking to follow the
[second law of `@extend`][laws].
* Allow extensions that match selectors but fail to unify.
* Partially-extended selectors are no longer used as parent selectors.
* Fix an edge case where both the extender and the extended selector
have invalid combinator sequences.
* Don't crash with a "Bad state: no element" error in certain edge cases.
[laws]: https://github.com/sass/sass/issues/324#issuecomment-4607184
## 1.0.0-alpha.9
* Elements without a namespace (such as `div`) are no longer unified with
elements with the empty namespace (such as `|div`). This unification didn't
match the results returned by `is-superselector()`, and was not guaranteed to
be valid.
* Support `&` within `@at-root`.
* Properly error when a compound selector is followed immediately by `&`.
* Properly handle variable scoping in `@at-root` and nested properties.
* Properly handle placeholder selectors in selector pseudos.
* Properly short-circuit the `or` and `and` operators.
* Support `--$variable`.
* Don't consider unitless numbers equal to numbers with units.
* Warn about using named colors in interpolation.
* Don't emit loud comments in functions.
* Detect import loops.
* Fix `@import` with a `supports()` clause.
* Forbid functions named "and", "or", and "not".
* Fix `type-of()` with a function.
* Emit a nicer error for invalid tokens in a selector.
* Fix `invert()` with a `$weight` parameter.
* Fix a unit-parsing edge-cases.
* Always parse imports with queries as plain CSS imports.
* Support `&` followed by a non-identifier.
* Properly handle split media queries.
* Properly handle a placeholder selector that isn't at the beginning of a
compound selector.
* Fix more `str-slice()` bugs.
* Fix the `%` operator.
* Allow whitespace between `=` and the mixin name in the indented syntax.
* Fix some slash division edge cases.
* Fix `not` when used like a function.
* Fix attribute selectors with single-character values.
* Fix some bugs with the `call()` function.
* Properly handle a backslash followed by a CRLF sequence in a quoted string.
* Fix numbers divided by colors.
* Support slash-separated numbers in arguments to plain CSS functions.
* Error out if a function is passed an unknown named parameter.
* Improve the speed of loading large files on Node.
* Don't consider browser-prefixed selector pseudos to be superselectors of
differently- or non-prefixed selector pseudos with the same base name.
* Fix an `@extend` edge case involving multiple combinators in a row.
* Fix a bug where a `@content` block could get incorrectly passed to a mixin.
* Properly isolate the lexical environments of different calls to the same mixin
and function.
## 1.0.0-alpha.8
* Add the `content-exists()` function.
* Support interpolation in loud comments.
* Fix a bug where even valid semicolons and exclamation marks in custom property
values were disallowed.
* Disallow invalid function names.
* Disallow extending across media queries.
* Properly parse whitespace after `...` in argument declaration lists.
* Support terse mixin syntax in the indented syntax.
* Fix `@at-root` query parsing.
* Support special functions in `@-moz-document`.
* Support `...` after a digit.
* Fix some bugs when treating a map as a list of pairs.
## 1.0.0-alpha.7
* Fix `function-exists()`, `variable-exists()`, and `mixin-exists()` to use the
lexical scope rather than always using the global scope.
* `str-index()` now correctly inserts at negative indices.
* Properly parse `url()`s that contain comment-like text.
* Fix a few more small `@extend` bugs.
* Fix a bug where interpolation in a quoted string was being dropped in some
circumstances.
* Properly handle `@for` rules where each bound has a different unit.
* Forbid mixins and functions from being defined in control directives.
* Fix a superselector-computation edge case involving `:not()`.
* Gracefully handle input files that are invalid UTF-8.
* Print a Sass stack trace when a file fails to load.
## 1.0.0-alpha.6
* Allow `var()` to be passed to `rgb()`, `rgba()`, `hsl()`, and `hsla()`.
* Fix conversions between numbers with `dpi`, `dpcm`, and `dppx` units.
Previously these conversions were inverted.
* Don't crash when calling `str-slice()` with an `$end-at` index lower than the
`$start-at` index.
* `str-slice()` now correctly returns `""` when `$end-at` is negative and points
before the beginning of the string.
* Interpolation in quoted strings now properly preserves newlines.
* Don't crash when passing only `$hue` or no keyword arguments to
`adjust-color()`, `scale-color()`, or `change-color()`.
* Preserve escapes in identifiers. This used to only work for identifiers in
SassScript.
* Fix a few small `@extend` bugs.
## 1.0.0-alpha.5
* Fix bounds-checking for `opacify()`, `fade-in()`, `transparentize()`, and
`fade-out()`.
* Fix a bug with `@extend` superselector calculations.
* Fix some cases where `#{...}--` would fail to parse in selectors.
* Allow a single number to be passed to `saturate()` for use in filter contexts.
* Fix a bug where `**/` would fail to close a loud comment.
* Fix a bug where mixin and function calls could set variables incorrectly.
* Move plain CSS `@import`s to the top of the document.
## 1.0.0-alpha.4
* Add support for bracketed lists.
* Add support for Unicode ranges.
* Add support for the Microsoft-style `=` operator.
* Print the filename for `@debug` rules.
* Fix a bug where `1 + - 2` and similar constructs would crash the parser.
* Fix a bug where `@extend` produced the wrong result when used with
selector combinators.
* Fix a bug where placeholder selectors were not allowed to be unified.
* Fix the `mixin-exists()` function.
* Fix `:nth-child()` and `:nth-last-child()` parsing when they contain `of
selector`.
## 1.0.0-alpha.3
* Fix a bug where color equality didn't take the alpha channel into account.
* Fix a bug with converting some RGB colors to HSL.
* Fix a parent selector resolution bug.
* Properly declare the arguments for `opacify()` and related functions.
* Add a missing dependency on the `stack_trace` package.
* Fix broken Windows archives.
* Emit colors using their original representation if possible.
* Emit colors without an original representation as names if possible.
## 1.0.0-alpha.2
* Fix a bug where variables, functions, and mixins were broken in imported
files.
## 1.0.0-alpha.1
* Initial alpha release.