Minor tweaks.

* add `'use strict'` statements
* use template literals

cli.js

@@ -1,5 +1,7 @@
 #!/usr/bin/env node
+
 'use strict';
+
 const os = require('os');
 const fs = require('fs');
 const meow = require('meow');
@@ -111,7 +113,7 @@ cli.flags = _.reduce(
 );
 
 function processError(err) {
-  process.stderr.write(chalk.red(indentString('Error: ' + (err.message || err), 2)));
+  process.stderr.write(chalk.red(indentString(`Error: ${err.message || err}`, 2)));
   process.stderr.write(os.EOL);
   process.stderr.write(indentString(help, 2));
   process.exit(1);

index.js

@@ -8,7 +8,9 @@
  * http://bezoerb.mit-license.org/
  * All rights reserved.
  */
+
 'use strict';
+
 const fs = require('fs');
 const path = require('path');
 const isString = require('lodash/isString');
@@ -103,6 +105,7 @@ function inline(html, styles, options) {
     // eslint-disable-next-line array-callback-return
     o.replaceStylesheets.map(href => {
       const link = document.createElement('link');
+
       link.setAttribute('rel', 'stylesheet');
       link.setAttribute('href', href);
       document.addNoscript(link);
@@ -130,6 +133,7 @@ function inline(html, styles, options) {
       if (o.extract) {
         const href = link.getAttribute('href');
         const file = path.resolve(path.join(o.basePath || process.cwd, href));
+
         if (fs.existsSync(file)) {
           const orig = fs.readFileSync(file);
           const diff = extractCss(orig, inlined, o.minify);

src/css.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const prettier = require('prettier');
 const CleanCSS = require('clean-css');
 const postcss = require('postcss');

src/dom.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const fs = require('fs');
 const path = require('path');
 const {JSDOM} = require('jsdom');
@@ -14,8 +16,8 @@ const UglifyJS = require('uglify-js');
 function getScript() {
   const loadCssMain = resolve.sync('fg-loadcss');
   const loadCssBase = path.dirname(loadCssMain);
-
   const loadCSS = fs.readFileSync(path.join(loadCssBase, 'cssrelpreload.js'), 'utf8');
+
   return UglifyJS.minify(loadCSS).code.trim();
 }
 
@@ -117,7 +119,7 @@ class Dom {
       .join(`\n${textIndent}`);
 
     const styles = this.document.createElement('style');
-    styles.append(this.document.createTextNode('\n' + textIndent + text + '\n' + referenceIndent));
+    styles.append(this.document.createTextNode(`\n${textIndent}${text}\n${referenceIndent}`));
     return styles;
   }
 
@@ -162,14 +164,14 @@ class Dom {
   insertStylesBefore(css, referenceNode) {
     const styles = this.createStyleNode(css);
     referenceNode.before(styles);
-    styles.after(this.document.createTextNode('\n' + this.headIndent.indent));
+    styles.after(this.document.createTextNode(`\n${this.headIndent.indent}`));
   }
 
   appendStyles(css, referenceNode) {
     const styles = this.createStyleNode(css);
     referenceNode.append(styles);
     styles.before(this.document.createTextNode(this.headIndent.indent));
-    styles.after(this.document.createTextNode('\n' + this.headIndent.indent));
+    styles.after(this.document.createTextNode(`\n${this.headIndent.indent}`));
   }
 
   addNoscript(link) {
@@ -180,12 +182,12 @@ class Dom {
 
   insertBefore(node, referenceNode) {
     referenceNode.before(node);
-    node.after(this.document.createTextNode('\n' + this.headIndent.indent));
+    node.after(this.document.createTextNode(`\n${this.headIndent.indent}`));
   }
 
   insertAfter(node, referenceNode) {
     referenceNode.after(node);
-    referenceNode.after(this.document.createTextNode('\n' + this.headIndent.indent));
+    referenceNode.after(this.document.createTextNode(`\n${this.headIndent.indent}`));
   }
 
   remove(node) {
@@ -220,7 +222,7 @@ class Dom {
 
     if (scriptAnchor) {
       scriptAnchor.after(script);
-      scriptAnchor.after(this.document.createTextNode('\n' + this.headIndent.indent));
+      scriptAnchor.after(this.document.createTextNode(`\n${this.headIndent.indent}`));
     }
   }
 }

test/cli.test.js

@@ -1,4 +1,7 @@
 /* eslint-env jest */
+
+'use strict';
+
 const path = require('path');
 const readPkgUp = require('read-pkg-up');
 const {read, strip, run, getArgs, pipe} = require('./helper');

test/helper/index.js

@@ -1,4 +1,7 @@
 /* eslint-env jest */
+
+'use strict';
+
 const path = require('path');
 const fs = require('fs-extra');
 const readPkgUp = require('read-pkg-up');

test/index.test.js

@@ -1,4 +1,7 @@
 /* eslint-env jest */
+
+'use strict';
+
 const path = require('path');
 const reaver = require('reaver');
 const {extractCss} = require('../src/css.js');