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fix: compatibility with webpack@4 and webpack@5 for monorepos #636

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merged 1 commit into from
Oct 22, 2020
Merged

fix: compatibility with webpack@4 and webpack@5 for monorepos #636

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19 changes: 9 additions & 10 deletions src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,8 +20,6 @@ const {
util: { createHash },
} = webpack;

const isWebpack4 = webpackVersion[0] === '4';

const pluginName = 'mini-css-extract-plugin';

const REGEXP_CHUNKHASH = /\[chunkhash(?::(\d+))?\]/i;
Expand Down Expand Up @@ -97,16 +95,12 @@ class MiniCssExtractPlugin {
this.options.chunkFilename = '[id].css';
}
}

if (!isWebpack4 && 'hmr' in this.options) {
throw new Error(
"The 'hmr' option doesn't exist for the mini-css-extract-plugin when using webpack 5 (it's automatically determined)"
);
}
}

/** @param {import("webpack").Compiler} compiler */
apply(compiler) {
const isWebpack4 = compiler.webpack ? false : webpackVersion[0] === '4';

if (!isWebpack4) {
const { splitChunks } = compiler.options.optimization;
if (splitChunks) {
Expand Down Expand Up @@ -200,7 +194,9 @@ class MiniCssExtractPlugin {

// We don't need hot update chunks for css
// We will use the real asset instead to update
if (chunk instanceof webpack.HotUpdateChunk) return;
if (chunk instanceof webpack.HotUpdateChunk) {
return;
}

const renderedModules = Array.from(
this.getChunkModules(chunk, chunkGraph)
Expand Down Expand Up @@ -439,7 +435,10 @@ class MiniCssExtractPlugin {
} else {
const enabledChunks = new WeakSet();
const handler = (chunk, set) => {
if (enabledChunks.has(chunk)) return;
if (enabledChunks.has(chunk)) {
return;
}

enabledChunks.add(chunk);

// eslint-disable-next-line global-require
Expand Down
4 changes: 2 additions & 2 deletions src/loader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,6 @@ import schema from './loader-options.json';

const pluginName = 'mini-css-extract-plugin';

const isWebpack4 = webpackVersion[0] === '4';

function hotLoader(content, context) {
const accept = context.locals
? ''
Expand Down Expand Up @@ -105,6 +103,8 @@ export function pitch(request) {

let source;

const isWebpack4 = childCompiler.webpack ? false : webpackVersion[0] === '4';

if (isWebpack4) {
childCompiler.hooks.afterCompile.tap(pluginName, (compilation) => {
source =
Expand Down