feat: add possibility to extend default minimize options (#414)

Author: fretfan

README.md

@@ -534,7 +534,7 @@ module.exports = {
 
 See [html-minifier-terser](https://github.com/DanielRuf/html-minifier-terser)'s documentation for more information on the available options.
 
-The rules can be disabled using the following options in your `webpack.conf.js`
+The default rules can be overridden using the following options in your `webpack.conf.js`
 
 **webpack.config.js**
 
@@ -557,6 +557,32 @@ module.exports = {
 };
 ```
 
+The default rules can be extended:
+
+**webpack.config.js**
+
+```js
+const { defaultMinimizerOptions } = require("html-loader");
+
+module.exports = {
+  module: {
+    rules: [
+      {
+        test: /\.html$/i,
+        loader: "html-loader",
+        options: {
+          minimize: {
+            ...defaultMinimizerOptions,
+            removeComments: false,
+            collapseWhitespace: false,
+          },
+        },
+      },
+    ],
+  },
+};
+```
+
 ### `esModule`
 
 Type: `Boolean`

src/cjs.js

@@ -2,3 +2,4 @@ const loader = require("./index");
 
 module.exports = loader.default;
 module.exports.raw = loader.raw;
+module.exports.defaultMinimizerOptions = loader.defaultMinimizerOptions;

src/index.js

@@ -5,6 +5,7 @@ import {
   getImportCode,
   getModuleCode,
   getExportCode,
+  defaultMinimizerOptions,
 } from "./utils";
 
 import schema from "./options.json";
@@ -52,3 +53,5 @@ export default async function loader(content) {
 
   return `${importCode}${moduleCode}${exportCode}`;
 }
+
+export { defaultMinimizerOptions };

src/utils.js

@@ -496,7 +496,7 @@ function isProductionMode(loaderContext) {
   return loaderContext.mode === "production" || !loaderContext.mode;
 }
 
-const defaultMinimizerOptions = {
+export const defaultMinimizerOptions = {
   caseSensitive: true,
   // `collapseBooleanAttributes` is not always safe, since this can break CSS attribute selectors and not safe for XHTML
   collapseWhitespace: true,