From f8c878ce08547731b4a3393934977d9920a5cd7d Mon Sep 17 00:00:00 2001 From: Adam Butterworth Date: Thu, 30 May 2019 12:37:25 -0600 Subject: [PATCH] feat: remove unused CSS with purgecss (#186) * fix: add purgecss to remove unused css * fix: prevent removal of some needed css selectors --- package-lock.json | 277 +++++++++++++++++++++++++++++++++ package.json | 1 + webpack/webpack.prod.config.js | 13 ++ 3 files changed, 291 insertions(+) diff --git a/package-lock.json b/package-lock.json index 6152b81..ebe0342 100644 --- a/package-lock.json +++ b/package-lock.json @@ -19452,6 +19452,283 @@ "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==", "dev": true }, + "purgecss": { + "version": "1.3.0", + "resolved": "https://registry.npmjs.org/purgecss/-/purgecss-1.3.0.tgz", + "integrity": "sha512-0UMnr8aUsPO7RbzAT72UELRvwMHhadtuunDm7rcgRS6b8pCVO8yglIqikiYFwQk2XP606mk+GpjI1G74Auxgtg==", + "dev": true, + "requires": { + "glob": "^7.1.3", 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"sha512-ZSU6lok2DuDBuR7VCte5V12eke0Tx8xsCKxMbOnMfuJNPccPGv4jflRUm2Wvr2yGB8lFzKNZaTWaSk9g3kCv5A==", + "dev": true, + "requires": { + "purgecss": "^1.3.0", + "webpack-sources": "^1.3.0" + } + }, "q": { "version": "1.5.1", "resolved": "https://registry.npmjs.org/q/-/q-1.5.1.tgz", diff --git a/package.json b/package.json index bd76989..904f98c 100755 --- a/package.json +++ b/package.json @@ -105,6 +105,7 @@ "new-relic-source-map-webpack-plugin": "1.1.0", "node-sass": "^4.7.2", "postcss-loader": "^3.0.0", + "purgecss-webpack-plugin": "^1.5.0", "react-dev-utils": "^5.0.0", "react-test-renderer": "^16.8.6", "reactifex": "1.1.1", diff --git a/webpack/webpack.prod.config.js b/webpack/webpack.prod.config.js index a5e1234..f83fd65 100755 --- a/webpack/webpack.prod.config.js +++ b/webpack/webpack.prod.config.js @@ -3,11 +3,13 @@ const Merge = require('webpack-merge'); const commonConfig = require('./webpack.common.config.js'); const path = require('path'); +const glob = require('glob'); const webpack = require('webpack'); const CleanWebpackPlugin = require('clean-webpack-plugin'); const HtmlWebpackNewRelicPlugin = require('html-webpack-new-relic-plugin'); const HtmlWebpackPlugin = require('html-webpack-plugin'); const MiniCssExtractPlugin = require('mini-css-extract-plugin'); +const PurgecssPlugin = require('purgecss-webpack-plugin'); const NewRelicSourceMapPlugin = require('new-relic-source-map-webpack-plugin'); const WebpackRTLPlugin = require('webpack-rtl-plugin'); const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin; // eslint-disable-line prefer-destructuring @@ -130,6 +132,17 @@ module.exports = Merge.smart(commonConfig, { new WebpackRTLPlugin({ filename: '[name].[contenthash].rtl.css', }), + // Scan files for class names and ids and remove unused css + new PurgecssPlugin({ + paths: [].concat( + // Scan files in this app + glob.sync(`${path.resolve(__dirname, '../src')}/**/*`, { nodir: true }), + // Scan files in any edx frontend-component + glob.sync(`${path.resolve(__dirname, '../node_modules/@edx/frontend-component')}*/**/*`, { nodir: true }), + ), + // Protect react-css-transition class names + whitelistPatterns: [/-enter/, /-appear/, /-exit/], + }), // Generates an HTML file in the output directory. new HtmlWebpackPlugin({ inject: true, // Appends script tags linking to the webpack bundles at the end of the body