diff --git a/.eslintrc.cjs b/.eslintrc.js
similarity index 67%
rename from .eslintrc.cjs
rename to .eslintrc.js
index aeaacb3..f29c5b6 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.js
@@ -2,7 +2,7 @@ module.exports = {
   root: true,
   parser: '@typescript-eslint/parser',
   parserOptions: {
-    sourceType: 'module',
+    sourceType: 'script',
     ecmaVersion: 2021,
     tsconfigRootDir: __dirname,
     warnOnUnsupportedTypeScriptVersion: false,
@@ -12,7 +12,7 @@ module.exports = {
     es2021: true,
     node: true,
   },
-  plugins: ['simple-import-sort', 'import', '@typescript-eslint'],
+  plugins: ['import', 'simple-import-sort', '@typescript-eslint'],
   extends: [
     'eslint:recommended',
     'plugin:import/recommended',
@@ -25,37 +25,29 @@ module.exports = {
       typescript: {
         project: ['tsconfig.json'],
       },
-      node: {
-        extensions: ['.cjs'],
-      },
     },
   },
   overrides: [
-    {
-      files: ['*.cjs'],
-      parserOptions: {
-        sourceType: 'script',
-      },
-      rules: {
-        'import/order': 1,
-        'simple-import-sort/imports': 0,
-        '@typescript-eslint/no-var-requires': 0,
-      },
-    },
     {
       files: ['*.ts'],
       parserOptions: {
+        sourceType: 'module',
         project: ['tsconfig.json'],
       },
       extends: [
         'plugin:@typescript-eslint/recommended-requiring-type-checking',
       ],
+      rules: {
+        'import/order': 0,
+        'sort-imports': 0,
+        'simple-import-sort/imports': 1,
+      },
     },
   ],
   rules: {
-    'import/order': 0,
-    'sort-imports': 0,
-    'simple-import-sort/imports': 1,
+    'import/order': 1,
+    'simple-import-sort/imports': 0,
+    '@typescript-eslint/no-var-requires': 0,
     'no-console': 1,
     'no-warning-comments': [1, { terms: ['todo', 'fixme', '@@@'] }],
   },
diff --git a/babel.config.js b/babel.config.js
index 1c43c09..40fab85 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,3 +1,3 @@
-export default {
+module.exports = {
   presets: ['@babel/preset-typescript'],
 };
diff --git a/eleventy.config.cjs b/eleventy.config.js
similarity index 100%
rename from eleventy.config.cjs
rename to eleventy.config.js
diff --git a/package.json b/package.json
index 5360989..6af8d80 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,6 @@
     "node": "^16",
     "yarn": "^3"
   },
-  "type": "module",
   "packageManager": "yarn@3.3.1",
   "scripts": {
     "serve": "run-p 'watch:**'",
@@ -25,8 +24,8 @@
     "build-dev:scripts": "rollup -c",
     "build-prod:scripts": "BABEL_ENV=production rollup -c",
     "watch:scripts": "npm run build-dev:scripts -- -w",
-    "build:11ty": "eleventy",
-    "watch:11ty": "eleventy --serve --incremental",
+    "build:11ty": "NODE_OPTIONS='-r ts-node/register' eleventy",
+    "watch:11ty": "yarn build:11ty --serve --incremental",
     "tsc": "tsc",
     "prettier": "prettier --write .",
     "prettier:ci": "prettier --check .",
@@ -77,6 +76,7 @@
     "semver-parser": "^4.1.2",
     "stylelint": "^15.2.0",
     "stylelint-config-standard-scss": "^7.0.1",
+    "ts-node": "^10.9.1",
     "typedoc": "^0.23.25",
     "typescript": "^4.9.5",
     "typogr": "^0.6.8"
diff --git a/rollup.config.js b/rollup.config.js
index ddecee3..7482282 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,9 +1,9 @@
-import { babel } from '@rollup/plugin-babel';
-import commonjs from '@rollup/plugin-commonjs';
-import inject from '@rollup/plugin-inject';
-import { nodeResolve } from '@rollup/plugin-node-resolve';
-import terser from '@rollup/plugin-terser';
-import { defineConfig } from 'rollup';
+const { babel } = require('@rollup/plugin-babel');
+const commonjs = require('@rollup/plugin-commonjs');
+const inject = require('@rollup/plugin-inject');
+const { nodeResolve } = require('@rollup/plugin-node-resolve');
+const terser = require('@rollup/plugin-terser');
+const { defineConfig } = require('rollup');
 
 const prod = process.env.BABEL_ENV === 'production';
 
@@ -24,7 +24,7 @@ if (prod) {
   plugins.push(terser());
 }
 
-export default defineConfig({
+module.exports = defineConfig({
   input: 'source/assets/js/sass.ts',
   output: {
     file: 'source/assets/dist/js/sass.js',
diff --git a/source/_data/releases.cjs b/source/_data/releases.js
similarity index 100%
rename from source/_data/releases.cjs
rename to source/_data/releases.js
index 943803b..b6f957f 100644
--- a/source/_data/releases.cjs
+++ b/source/_data/releases.js
@@ -1,7 +1,7 @@
 const { spawn: nodeSpawn } = require('node:child_process');
 const fs = require('node:fs/promises');
-const deepEqual = require('deep-equal');
 
+const deepEqual = require('deep-equal');
 const chalk = require('kleur');
 
 const VERSION_CACHE_PATH = './source/_data/versionCache.json';
diff --git a/source/helpers/sass_helpers.ts b/source/helpers/sass_helpers.ts
index 01cb30f..b2d1b0e 100644
--- a/source/helpers/sass_helpers.ts
+++ b/source/helpers/sass_helpers.ts
@@ -1,4 +1,4 @@
-function getImplStatus(status) {
+export function getImplStatus(status: string | boolean | null) {
   switch (status) {
     case null:
       return status;
@@ -12,5 +12,3 @@ function getImplStatus(status) {
       return `since ${status}`;
   }
 }
-
-module.exports = { getImplStatus };
diff --git a/tool/typedoc-theme.cjs b/tool/typedoc-theme.js
similarity index 99%
rename from tool/typedoc-theme.cjs
rename to tool/typedoc-theme.js
index 85ea241..fe8f4c4 100644
--- a/tool/typedoc-theme.cjs
+++ b/tool/typedoc-theme.js
@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-var-requires */
 const {
   DefaultTheme,
   DefaultThemeRenderContext,
diff --git a/yarn.lock b/yarn.lock
index f0f24d8..a745184 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1396,6 +1396,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@cspotcode/source-map-support@npm:^0.8.0":
+  version: 0.8.1
+  resolution: "@cspotcode/source-map-support@npm:0.8.1"
+  dependencies:
+    "@jridgewell/trace-mapping": 0.3.9
+  checksum: 5718f267085ed8edb3e7ef210137241775e607ee18b77d95aa5bd7514f47f5019aa2d82d96b3bf342ef7aa890a346fa1044532ff7cc3009e7d24fce3ce6200fa
+  languageName: node
+  linkType: hard
+
 "@csstools/css-parser-algorithms@npm:^2.0.1":
   version: 2.0.1
   resolution: "@csstools/css-parser-algorithms@npm:2.0.1"
@@ -1509,7 +1518,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jridgewell/resolve-uri@npm:3.1.0":
+"@jridgewell/resolve-uri@npm:3.1.0, @jridgewell/resolve-uri@npm:^3.0.3":
   version: 3.1.0
   resolution: "@jridgewell/resolve-uri@npm:3.1.0"
   checksum: b5ceaaf9a110fcb2780d1d8f8d4a0bfd216702f31c988d8042e5f8fbe353c55d9b0f55a1733afdc64806f8e79c485d2464680ac48a0d9fcadb9548ee6b81d267
@@ -1540,6 +1549,16 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jridgewell/trace-mapping@npm:0.3.9":
+  version: 0.3.9
+  resolution: "@jridgewell/trace-mapping@npm:0.3.9"
+  dependencies:
+    "@jridgewell/resolve-uri": ^3.0.3
+    "@jridgewell/sourcemap-codec": ^1.4.10
+  checksum: d89597752fd88d3f3480845691a05a44bd21faac18e2185b6f436c3b0fd0c5a859fbbd9aaa92050c4052caf325ad3e10e2e1d1b64327517471b7d51babc0ddef
+  languageName: node
+  linkType: hard
+
 "@jridgewell/trace-mapping@npm:^0.3.9":
   version: 0.3.17
   resolution: "@jridgewell/trace-mapping@npm:0.3.17"
@@ -1743,6 +1762,34 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@tsconfig/node10@npm:^1.0.7":
+  version: 1.0.9
+  resolution: "@tsconfig/node10@npm:1.0.9"
+  checksum: a33ae4dc2a621c0678ac8ac4bceb8e512ae75dac65417a2ad9b022d9b5411e863c4c198b6ba9ef659e14b9fb609bbec680841a2e84c1172df7a5ffcf076539df
+  languageName: node
+  linkType: hard
+
+"@tsconfig/node12@npm:^1.0.7":
+  version: 1.0.11
+  resolution: "@tsconfig/node12@npm:1.0.11"
+  checksum: 5ce29a41b13e7897a58b8e2df11269c5395999e588b9a467386f99d1d26f6c77d1af2719e407621412520ea30517d718d5192a32403b8dfcc163bf33e40a338a
+  languageName: node
+  linkType: hard
+
+"@tsconfig/node14@npm:^1.0.0":
+  version: 1.0.3
+  resolution: "@tsconfig/node14@npm:1.0.3"
+  checksum: 19275fe80c4c8d0ad0abed6a96dbf00642e88b220b090418609c4376e1cef81bf16237bf170ad1b341452feddb8115d8dd2e5acdfdea1b27422071163dc9ba9d
+  languageName: node
+  linkType: hard
+
+"@tsconfig/node16@npm:^1.0.2":
+  version: 1.0.3
+  resolution: "@tsconfig/node16@npm:1.0.3"
+  checksum: 3a8b657dd047495b7ad23437d6afd20297ce90380ff0bdee93fc7d39a900dbd8d9e26e53ff6b465e7967ce2adf0b218782590ce9013285121e6a5928fbd6819f
+  languageName: node
+  linkType: hard
+
 "@types/estree@npm:*, @types/estree@npm:^1.0.0":
   version: 1.0.0
   resolution: "@types/estree@npm:1.0.0"
@@ -1975,6 +2022,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"acorn-walk@npm:^8.1.1":
+  version: 8.2.0
+  resolution: "acorn-walk@npm:8.2.0"
+  checksum: 1715e76c01dd7b2d4ca472f9c58968516a4899378a63ad5b6c2d668bba8da21a71976c14ec5f5b75f887b6317c4ae0b897ab141c831d741dc76024d8745f1ad1
+  languageName: node
+  linkType: hard
+
 "acorn@npm:^7.1.1":
   version: 7.4.1
   resolution: "acorn@npm:7.4.1"
@@ -1984,7 +2038,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"acorn@npm:^8.5.0, acorn@npm:^8.8.0":
+"acorn@npm:^8.4.1, acorn@npm:^8.5.0, acorn@npm:^8.8.0":
   version: 8.8.2
   resolution: "acorn@npm:8.8.2"
   bin:
@@ -2113,6 +2167,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"arg@npm:^4.1.0":
+  version: 4.1.3
+  resolution: "arg@npm:4.1.3"
+  checksum: 544af8dd3f60546d3e4aff084d451b96961d2267d668670199692f8d054f0415d86fc5497d0e641e91546f0aa920e7c29e5250e99fc89f5552a34b5d93b77f43
+  languageName: node
+  linkType: hard
+
 "argparse@npm:^1.0.7":
   version: 1.0.10
   resolution: "argparse@npm:1.0.10"
@@ -2691,6 +2752,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"create-require@npm:^1.1.0":
+  version: 1.1.1
+  resolution: "create-require@npm:1.1.1"
+  checksum: a9a1503d4390d8b59ad86f4607de7870b39cad43d929813599a23714831e81c520bddf61bcdd1f8e30f05fd3a2b71ae8538e946eb2786dc65c2bbc520f692eff
+  languageName: node
+  linkType: hard
+
 "cross-spawn@npm:^6.0.5":
   version: 6.0.5
   resolution: "cross-spawn@npm:6.0.5"
@@ -2908,6 +2976,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"diff@npm:^4.0.1":
+  version: 4.0.2
+  resolution: "diff@npm:4.0.2"
+  checksum: f2c09b0ce4e6b301c221addd83bf3f454c0bc00caa3dd837cf6c127d6edf7223aa2bbe3b688feea110b7f262adbfc845b757c44c8a9f8c0c5b15d8fa9ce9d20d
+  languageName: node
+  linkType: hard
+
 "dir-glob@npm:^3.0.1":
   version: 3.0.1
   resolution: "dir-glob@npm:3.0.1"
@@ -4995,6 +5070,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"make-error@npm:^1.1.1":
+  version: 1.3.6
+  resolution: "make-error@npm:1.3.6"
+  checksum: b86e5e0e25f7f777b77fabd8e2cbf15737972869d852a22b7e73c17623928fccb826d8e46b9951501d3f20e51ad74ba8c59ed584f610526a48f8ccf88aaec402
+  languageName: node
+  linkType: hard
+
 "make-fetch-happen@npm:^10.0.3":
   version: 10.2.1
   resolution: "make-fetch-happen@npm:10.2.1"
@@ -6501,6 +6583,7 @@ __metadata:
     semver-parser: ^4.1.2
     stylelint: ^15.2.0
     stylelint-config-standard-scss: ^7.0.1
+    ts-node: ^10.9.1
     typedoc: ^0.23.25
     typescript: ^4.9.5
     typogr: ^0.6.8
@@ -7197,6 +7280,44 @@ __metadata:
   languageName: node
   linkType: hard
 
+"ts-node@npm:^10.9.1":
+  version: 10.9.1
+  resolution: "ts-node@npm:10.9.1"
+  dependencies:
+    "@cspotcode/source-map-support": ^0.8.0
+    "@tsconfig/node10": ^1.0.7
+    "@tsconfig/node12": ^1.0.7
+    "@tsconfig/node14": ^1.0.0
+    "@tsconfig/node16": ^1.0.2
+    acorn: ^8.4.1
+    acorn-walk: ^8.1.1
+    arg: ^4.1.0
+    create-require: ^1.1.0
+    diff: ^4.0.1
+    make-error: ^1.1.1
+    v8-compile-cache-lib: ^3.0.1
+    yn: 3.1.1
+  peerDependencies:
+    "@swc/core": ">=1.2.50"
+    "@swc/wasm": ">=1.2.50"
+    "@types/node": "*"
+    typescript: ">=2.7"
+  peerDependenciesMeta:
+    "@swc/core":
+      optional: true
+    "@swc/wasm":
+      optional: true
+  bin:
+    ts-node: dist/bin.js
+    ts-node-cwd: dist/bin-cwd.js
+    ts-node-esm: dist/bin-esm.js
+    ts-node-script: dist/bin-script.js
+    ts-node-transpile-only: dist/bin-transpile.js
+    ts-script: dist/bin-script-deprecated.js
+  checksum: 090adff1302ab20bd3486e6b4799e90f97726ed39e02b39e566f8ab674fd5bd5f727f43615debbfc580d33c6d9d1c6b1b3ce7d8e3cca3e20530a145ffa232c35
+  languageName: node
+  linkType: hard
+
 "tsconfig-paths@npm:^3.14.1":
   version: 3.14.1
   resolution: "tsconfig-paths@npm:3.14.1"
@@ -7446,6 +7567,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"v8-compile-cache-lib@npm:^3.0.1":
+  version: 3.0.1
+  resolution: "v8-compile-cache-lib@npm:3.0.1"
+  checksum: 78089ad549e21bcdbfca10c08850022b22024cdcc2da9b168bcf5a73a6ed7bf01a9cebb9eac28e03cd23a684d81e0502797e88f3ccd27a32aeab1cfc44c39da0
+  languageName: node
+  linkType: hard
+
 "v8-compile-cache@npm:^2.3.0":
   version: 2.3.0
   resolution: "v8-compile-cache@npm:2.3.0"
@@ -7633,6 +7761,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"yn@npm:3.1.1":
+  version: 3.1.1
+  resolution: "yn@npm:3.1.1"
+  checksum: 2c487b0e149e746ef48cda9f8bad10fc83693cd69d7f9dcd8be4214e985de33a29c9e24f3c0d6bcf2288427040a8947406ab27f7af67ee9456e6b84854f02dd6
+  languageName: node
+  linkType: hard
+
 "yocto-queue@npm:^0.1.0":
   version: 0.1.0
   resolution: "yocto-queue@npm:0.1.0"