feat: drop webpack 4 and node <= 10 support

BREAKING CHANGE: drop support for webpack 4 and node <= 10

Author: jantimon

.github/workflows/main.yml

@@ -8,9 +8,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node: ['6.x', '12.x', '14.x']
-        os: [ubuntu-latest, windows-latest]
-        webpack: ['4']
+        node: ['10.x', '12.x', '14.x']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        webpack: ['5']
 
     steps:
       - name: LF

.node-version

@@ -1 +1 @@
-6.11.5
+10.13.0

index.js

@@ -28,8 +28,6 @@ const { assert } = require('console');
 const fsStatAsync = promisify(fs.stat);
 const fsReadFileAsync = promisify(fs.readFile);
 
-const webpackMajorVersion = Number(require('webpack/package.json').version.split('.')[0]);
-
 class HtmlWebpackPlugin {
   /**
    * @param {HtmlWebpackOptions} [options]
@@ -164,9 +162,7 @@ class HtmlWebpackPlugin {
           hash: templateResult.mainCompilationHash
         };
 
-        const childCompilationOutputName = webpackMajorVersion === 4
-          ? compilation.mainTemplate.getAssetPath(this.options.filename, compiledEntries)
-          : compilation.getAssetPath(this.options.filename, compiledEntries);
+        const childCompilationOutputName = compilation.getAssetPath(this.options.filename, compiledEntries);
 
         // If the child compilation was not executed during a previous main compile run
         // it is a cached result
@@ -543,14 +539,10 @@ class HtmlWebpackPlugin {
      * if a path publicPath is set in the current webpack config use it otherwise
      * fallback to a relative path
      */
-    const webpackPublicPath = webpackMajorVersion === 4
-      ? compilation.mainTemplate.getPublicPath({ hash: compilationHash })
-      : compilation.getAssetPath(compilation.outputOptions.publicPath, { hash: compilationHash });
-
-    const isPublicPathDefined = webpackMajorVersion === 4
-      ? webpackPublicPath.trim() !== ''
-      // Webpack 5 introduced "auto" - however it can not be retrieved at runtime
-      : webpackPublicPath.trim() !== '' && webpackPublicPath !== 'auto';
+    const webpackPublicPath = compilation.getAssetPath(compilation.outputOptions.publicPath, { hash: compilationHash });
+
+    // Webpack 5 introduced "auto" - however it can not be retrieved at compile time
+    const isPublicPathDefined = webpackPublicPath.trim() !== '' && webpackPublicPath !== 'auto';
 
     let publicPath =
       // If the html-webpack-plugin options contain a custom public path uset it

lib/child-compiler.js

@@ -168,18 +168,14 @@ class HtmlWebpackChildCompiler {
  * @returns Array<string>
  */
 function extractHelperFilesFromCompilation (mainCompilation, childCompilation, filename, childEntryChunks) {
-  const webpackMajorVersion = Number(require('webpack/package.json').version.split('.')[0]);
-
   const helperAssetNames = childEntryChunks.map((entryChunk, index) => {
     const entryConfig = {
       hash: childCompilation.hash,
       chunk: entryChunk,
       name: `HtmlWebpackPlugin_${index}`
     };
 
-    return webpackMajorVersion === 4
-      ? mainCompilation.mainTemplate.getAssetPath(filename, entryConfig)
-      : mainCompilation.getAssetPath(filename, entryConfig);
+    return mainCompilation.getAssetPath(filename, entryConfig);
   });
 
   helperAssetNames.forEach((helperFileName) => {

package.json

@@ -46,7 +46,7 @@
     "standard-version": "5.0.2",
     "style-loader": "0.23.1",
     "typescript": "3.8.3",
-    "webpack": "4.35.2",
+    "webpack": "5.0.0",
     "webpack-recompilation-simulator": "3.2.0"
   },
   "dependencies": {
@@ -61,7 +61,7 @@
     "util.promisify": "1.0.0"
   },
   "peerDependencies": {
-    "webpack": "^4.0.0 || ^5.0.0"
+    "webpack": "^5.0.0"
   },
   "keywords": [
     "webpack",
@@ -73,7 +73,7 @@
   "homepage": "https://github.com/jantimon/html-webpack-plugin",
   "repository": "https://github.com/jantimon/html-webpack-plugin.git",
   "engines": {
-    "node": ">=6.9"
+    "node": ">=10.13.0"
   },
   "config": {
     "commitizen": {