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/** * Copyright (c) 2015-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */
// This webpack plugin lets us interpolate custom variables into `index.html`.
// Usage: `new InterpolateHtmlPlugin(HtmlWebpackPlugin, { 'MY_VARIABLE': 42 })`
// Then, you can use %MY_VARIABLE% in your `index.html`.
// It works in tandem with HtmlWebpackPlugin.
// Learn more about creating plugins like this:
// https://github.com/ampedandwired/html-webpack-plugin#events
'use strict'; const escapeStringRegexp = require('escape-string-regexp');
class InterpolateHtmlPlugin { constructor(htmlWebpackPlugin, replacements) { this.htmlWebpackPlugin = htmlWebpackPlugin; this.replacements = replacements; }
apply(compiler) { compiler.hooks.compilation.tap('InterpolateHtmlPlugin', compilation => { this.htmlWebpackPlugin .getHooks(compilation) .afterTemplateExecution.tap('InterpolateHtmlPlugin', data => { // Run HTML through a series of user-specified string replacements.
Object.keys(this.replacements).forEach(key => { const value = this.replacements[key]; data.html = data.html.replace( new RegExp('%' + escapeStringRegexp(key) + '%', 'g'), value ); }); }); }); } }
module.exports = InterpolateHtmlPlugin;
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