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InterpolateHtmlPlugin.js
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Mon, Feb 10, 15:35

InterpolateHtmlPlugin.js
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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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