78 lines
2.5 KiB
JavaScript
78 lines
2.5 KiB
JavaScript
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const pluginName = 'AsyncChunkSrcVersionParameterPlugin';
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/**
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* Inspired by: https://github.com/webpack/webpack/issues/8115#issuecomment-663902035.
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*
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* This plugin modifies the webpack bootstrap code generated by the plugin at
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* webpack/lib/web/JsonpMainTemplatePlugin.js and the CSS chunk loading code generated
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* by @automattic/mini-css-extract-plugin-with-rtl.
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*
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* It will rename the function jsonpScriptSrc generated by that to webpackJsonpScriptSrc
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* and install a new version that checks a user provided variable containing a script
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* version parameter to specify in async chunk URLs.
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*
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* The jsonpScriptSrc override is only for webpack 4 (tested with 4.43 and 4.44).
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*
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* Webpack 5 has official support for this https://github.com/webpack/webpack/pull/8462
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* so it won't be necessary.
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*
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* It will also append the ?ver parameter to CSS chunk hrefs loaded by @automattic/mini-css-extract-plugin-with-rtl.
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*/
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class AsyncChunkSrcVersionParameterPlugin {
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_applyMainTemplate( mainTemplate ) {
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// Append script version to all async JS chunks loaded with jsonpScriptSrc().
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mainTemplate.hooks.localVars.tap(
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// Use stage 1 to ensure this executes after webpack/lib/web/JsonpMainTemplatePlugin.js.
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{ name: pluginName, stage: 1 },
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( source ) => {
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if ( source.includes( 'function jsonpScriptSrc' ) ) {
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const modSource = source.replace(
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'function jsonpScriptSrc',
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'function webpackJsonpScriptSrc'
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);
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return `${ modSource }
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function jsonpScriptSrc(chunkId) {
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var src = webpackJsonpScriptSrc(chunkId);
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if ( window.wcAdminAssets && window.wcAdminAssets.version ) {
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src += '?ver=' + window.wcAdminAssets.version;
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}
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return src;
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}
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`;
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}
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return source;
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}
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);
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// Append script version to all async CSS chunks loaded by @automattic/mini-css-extract-plugin-with-rtl.
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mainTemplate.hooks.requireEnsure.tap(
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// Use stage 1 to ensure this executes after @automattic/mini-css-extract-plugin-with-rtl.
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{ name: pluginName, stage: 1 },
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( source ) => {
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if (
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source.includes( '// mini-css-extract-plugin CSS loading' )
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) {
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return source.replace(
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'linkTag.href = fullhref;',
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`linkTag.href = fullhref;
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if ( window.wcAdminAssets && window.wcAdminAssets.version ) {
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linkTag.href += '?ver=' + window.wcAdminAssets.version;
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}`
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);
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}
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return source;
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}
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);
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}
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apply( compiler ) {
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compiler.hooks.thisCompilation.tap( pluginName, ( compilation ) => {
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this._applyMainTemplate( compilation.mainTemplate );
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} );
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}
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}
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module.exports = AsyncChunkSrcVersionParameterPlugin;
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