b4d349e6c1
* Reduce Install Size This should shave a decent amount off our install size. * Fix CSS source map emitting * Fix generation * Enable source maps for testing purposes * Disable double comment * Fix test regex
67 lines
2.1 KiB
TypeScript
67 lines
2.1 KiB
TypeScript
import { process as minify } from 'cssnano-simple'
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import webpack from 'webpack'
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import { RawSource, SourceMapSource } from 'webpack-sources'
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// https://github.com/NMFR/optimize-css-assets-webpack-plugin/blob/0a410a9bf28c7b0e81a3470a13748e68ca2f50aa/src/index.js#L20
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const CSS_REGEX = /\.css(\?.*)?$/i
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type CssMinimizerPluginOptions = {
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postcssOptions: {
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map: false | { prev?: string | false; inline: boolean; annotation: boolean }
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}
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}
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export class CssMinimizerPlugin {
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private options: CssMinimizerPluginOptions
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constructor(options: CssMinimizerPluginOptions) {
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this.options = options
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}
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apply(compiler: webpack.Compiler) {
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compiler.hooks.compilation.tap('CssMinimizerPlugin', compilation => {
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compilation.hooks.optimizeChunkAssets.tapPromise(
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'CssMinimizerPlugin',
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chunks =>
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Promise.all(
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chunks
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.reduce(
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(acc, chunk) => acc.concat(chunk.files || []),
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[] as string[]
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)
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.filter(entry => CSS_REGEX.test(entry))
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.map(file => {
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const postcssOptions = {
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...this.options.postcssOptions,
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to: file,
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from: file,
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}
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const asset = compilation.assets[file]
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let input: string
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if (postcssOptions.map && asset.sourceAndMap) {
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const { source, map } = asset.sourceAndMap()
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input = source
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postcssOptions.map.prev = map ? map : false
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} else {
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input = asset.source()
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}
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return minify(input, postcssOptions).then(res => {
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if (res.map) {
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compilation.assets[file] = new SourceMapSource(
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res.css,
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file,
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res.map.toJSON()
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)
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} else {
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compilation.assets[file] = new RawSource(res.css)
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}
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})
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})
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)
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)
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})
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}
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}
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