Simplifies creation of HTML files to serve your webpack bundles. 

Simplifies creation of HTML files to serve your webpack bundles

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/** @typedef {import("./typings").HtmlTagObject} HtmlTagObject */

/** @typedef {import("./typings").Options} HtmlWebpackOptions */

/** @typedef {import("./typings").ProcessedOptions} ProcessedHtmlWebpackOptions */

/** @typedef {import("./typings").TemplateParameter} TemplateParameter */

/** @typedef {import("webpack/lib/Compiler.js")} WebpackCompiler */

/** @typedef {import("webpack/lib/Compilation.js")} WebpackCompilation */

const promisify = require('util').promisify;

const loaderUtils = require('loader-utils');

const { CachedChildCompilation } = require('./lib/cached-child-compiler');

const { createHtmlTagObject, htmlTagObjectToString, HtmlTagArray } = require('./lib/html-tags');

const prettyError = require('./lib/errors.js');

const chunkSorter = require('./lib/chunksorter.js');

const getHtmlWebpackPluginHooks = require('./lib/hooks.js').getHtmlWebpackPluginHooks;

const fsReadFileAsync = promisify(fs.readFile);

   * @param {HtmlWebpackOptions} [options]

    this.version = HtmlWebpackPlugin.version;

    // Wait for configuration preset plugions to apply all configure webpack defaults

    compiler.hooks.initialize.tap('HtmlWebpackPlugin', () => {

      const userOptions = this.userOptions;

      /** @type {ProcessedHtmlWebpackOptions} */

        templateParameters: templateParametersGenerator,

        publicPath: userOptions.publicPath === undefined ? 'auto' : userOptions.publicPath,

        inject: userOptions.scriptLoading === 'blocking' ? 'body' : 'head',

      const options = Object.assign(defaultOptions, userOptions);

      // Default metaOptions if no template is provided

      if (!userOptions.template && options.templateContent === false && options.meta) {

        // From https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag

          viewport: 'width=device-width, initial-scale=1'

        options.meta = Object.assign({}, options.meta, defaultMeta, userOptions.meta);

      // entryName to fileName conversion function

      const userOptionFilename = userOptions.filename || defaultOptions.filename;

      const filenameFunction = typeof userOptionFilename === 'function'

        // Replace '[name]' with entry name

        : (entryName) => userOptionFilename.replace(/\[name\]/g, entryName);

      /** output filenames for the given entry names */

      const outputFileNames = new Set(Object.keys(compiler.options.entry).map(filenameFunction));

      /** Option for every entry point */

      const entryOptions = Array.from(outputFileNames).map((filename) => ({

      // Hook all options into the webpack compiler

      entryOptions.forEach((instanceOptions) => {

        hookIntoCompiler(compiler, instanceOptions, this);

          stage: webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONS

           * Hacky intermediate solution arround the open webpack issue https://github.com/webpack/webpack/issues/11822 which does not

           * allow to generate the HTML after the JS and CSS has been optimized

           * This can break on any minor webpack release as it messes with the webpack internal enum values:

          webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE + 200

       * Hook into the PROCESS_ASSETS_STAGE_ADDITIONS hook

       * @param {WebpackCompilation} compilationAssets

       * @param {(err?: Error) => void} callback

        (compilationAssets, callback) => {

          // Get all entry point names for this html file

          const entryNames = Array.from(compilation.entrypoints.keys());

          const filteredEntryNames = filterChunks(entryNames, options.chunks, options.excludeChunks);

          const sortedEntryNames = sortEntryChunks(filteredEntryNames, options.chunksSortMode, compilation);

          const templateResult = options.templateContent

            ? { mainCompilationHash: compilation.hash }

            : childCompilerPlugin.getCompilationEntryResult(options.template);

          if ('error' in templateResult) {

            compilation.errors.push(prettyError(templateResult.error, compiler.context).toString());

          const compiledEntries = 'compiledEntry' in templateResult ? {

            hash: templateResult.compiledEntry.hash,

            chunk: templateResult.compiledEntry.entry

            hash: templateResult.mainCompilationHash

          const childCompilationOutputName = compilation.getAssetPath(options.filename, compiledEntries);

          // If the child compilation was not executed during a previous main compile run

          const isCompilationCached = templateResult.mainCompilationHash !== compilation.hash;

          // Turn the entry point names into file paths

          const assets = htmlWebpackPluginAssets(compilation, childCompilationOutputName, sortedEntryNames, options.publicPath);

          // If the template and the assets did not change we don't have to emit the html

          const newAssetJson = JSON.stringify(getAssetFiles(assets));

          if (isCompilationCached && options.cache && assetJson === newAssetJson) {

            previousEmittedAssets.forEach(({ name, html }) => {

              compilation.emitAsset(name, new webpack.sources.RawSource(html, false));

          // The html-webpack plugin uses a object representation for the html-tags which will be injected

          // to allow altering them more easily

          // Just before they are converted a third-party-plugin author might change the order and content

          const assetsPromise = getFaviconPublicPath(options.favicon, compilation, assets.publicPath)

              assets.favicon = faviconPath;

              return getHtmlWebpackPluginHooks(compilation).beforeAssetTagGeneration.promise({

                outputName: childCompilationOutputName,

          // Turn the js and css paths into grouped HtmlTagObjects

          const assetTagGroupsPromise = assetsPromise

          // And allow third-party-plugin authors to reorder and change the assetTags before they are grouped

            .then(({ assets }) => getHtmlWebpackPluginHooks(compilation).alterAssetTags.promise({

                scripts: generatedScriptTags(assets.js),

                styles: generateStyleTags(assets.css),

                  ...generateBaseTag(options.base),

                  ...generatedMetaTags(options.meta),

                  ...generateFaviconTags(assets.favicon)

              outputName: childCompilationOutputName,

		{
		"name": "html-webpack-plugin",
		"version": "5.0.0-alpha.12",
		"version": "5.0.0-alpha.13",
		"license": "MIT",
		@@ -5,0 +5,0 @@ "description": "Simplifies creation of HTML files to serve your webpack bundles",

		@@ -210,3 +210,10 @@ // @ts-check
		name: 'HtmlWebpackPlugin',
		stage: webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONS
		stage:
		/**
		* Hacky intermediate solution arround the open webpack issue https://github.com/webpack/webpack/issues/11822 which does not
		* allow to generate the HTML after the JS and CSS has been optimized
		*
		* This can break on any minor webpack release as it messes with the webpack internal enum values:
		*/
		webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE + 200
		},
		@@ -213,0 +220,0 @@ /**

Improved metrics