267 lines
12 KiB
JavaScript
267 lines
12 KiB
JavaScript
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'use strict';
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const autoprefixer = require('autoprefixer');
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const path = require('path');
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const webpack = require('webpack');
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const HtmlWebpackPlugin = require('html-webpack-plugin');
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const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
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const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
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const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
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const eslintFormatter = require('react-dev-utils/eslintFormatter');
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const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
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const getClientEnvironment = require('./env');
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const paths = require('./paths');
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const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');
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// Webpack uses `publicPath` to determine where the app is being served from.
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// In development, we always serve from the root. This makes config easier.
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const publicPath = '/';
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// `publicUrl` is just like `publicPath`, but we will provide it to our app
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// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
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// Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
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const publicUrl = '';
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// Get environment variables to inject into our app.
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const env = getClientEnvironment(publicUrl);
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// This is the development configuration.
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// It is focused on developer experience and fast rebuilds.
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// The production configuration is different and lives in a separate file.
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module.exports = {
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// You may want 'eval' instead if you prefer to see the compiled output in DevTools.
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// See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.
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devtool: 'cheap-module-source-map',
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// These are the "entry points" to our application.
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// This means they will be the "root" imports that are included in JS bundle.
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// The first two entry points enable "hot" CSS and auto-refreshes for JS.
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entry: [
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// We ship a few polyfills by default:
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require.resolve('./polyfills'),
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// Include an alternative client for WebpackDevServer. A client's job is to
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// connect to WebpackDevServer by a socket and get notified about changes.
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// When you save a file, the client will either apply hot updates (in case
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// of CSS changes), or refresh the page (in case of JS changes). When you
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// make a syntax error, this client will display a syntax error overlay.
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// Note: instead of the default WebpackDevServer client, we use a custom one
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// to bring better experience for Create React App users. You can replace
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// the line below with these two lines if you prefer the stock client:
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// require.resolve('webpack-dev-server/client') + '?/',
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// require.resolve('webpack/hot/dev-server'),
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require.resolve('react-dev-utils/webpackHotDevClient'),
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// Finally, this is your app's code:
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paths.appIndexJs,
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// We include the app code last so that if there is a runtime error during
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// initialization, it doesn't blow up the WebpackDevServer client, and
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// changing JS code would still trigger a refresh.
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],
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output: {
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// Add /* filename */ comments to generated require()s in the output.
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pathinfo: true,
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// This does not produce a real file. It's just the virtual path that is
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// served by WebpackDevServer in development. This is the JS bundle
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// containing code from all our entry points, and the Webpack runtime.
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filename: 'static/js/bundle.js',
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// There are also additional JS chunk files if you use code splitting.
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chunkFilename: 'static/js/[name].chunk.js',
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// This is the URL that app is served from. We use "/" in development.
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publicPath: publicPath,
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// Point sourcemap entries to original disk location (format as URL on Windows)
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devtoolModuleFilenameTemplate: info =>
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path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
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},
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resolve: {
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// This allows you to set a fallback for where Webpack should look for modules.
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// We placed these paths second because we want `node_modules` to "win"
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// if there are any conflicts. This matches Node resolution mechanism.
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// https://github.com/facebookincubator/create-react-app/issues/253
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modules: ['node_modules', paths.appNodeModules].concat(
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// It is guaranteed to exist because we tweak it in `env.js`
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process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
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),
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// These are the reasonable defaults supported by the Node ecosystem.
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// We also include JSX as a common component filename extension to support
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// some tools, although we do not recommend using it, see:
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// https://github.com/facebookincubator/create-react-app/issues/290
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// `web` extension prefixes have been added for better support
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// for React Native Web.
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extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
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alias: {
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// Support React Native Web
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// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
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'react-native': 'react-native-web',
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},
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plugins: [
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// Prevents users from importing files from outside of src/ (or node_modules/).
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// This often causes confusion because we only process files within src/ with babel.
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// To fix this, we prevent you from importing files out of src/ -- if you'd like to,
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// please link the files into your node_modules/ and let module-resolution kick in.
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// Make sure your source files are compiled, as they will not be processed in any way.
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new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
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],
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},
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module: {
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strictExportPresence: true,
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rules: [
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// TODO: Disable require.ensure as it's not a standard language feature.
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// We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
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// { parser: { requireEnsure: false } },
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// First, run the linter.
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// It's important to do this before Babel processes the JS.
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{
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test: /\.(js|jsx|mjs)$/,
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enforce: 'pre',
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use: [
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{
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options: {
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formatter: eslintFormatter,
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eslintPath: require.resolve('eslint'),
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},
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loader: require.resolve('eslint-loader'),
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},
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],
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include: paths.appSrc,
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},
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{
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// "oneOf" will traverse all following loaders until one will
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// match the requirements. When no loader matches it will fall
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// back to the "file" loader at the end of the loader list.
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oneOf: [
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// "url" loader works like "file" loader except that it embeds assets
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// smaller than specified limit in bytes as data URLs to avoid requests.
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// A missing `test` is equivalent to a match.
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{
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test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
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loader: require.resolve('url-loader'),
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options: {
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limit: 10000,
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name: 'static/media/[name].[hash:8].[ext]',
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},
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},
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// Process JS with Babel.
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{
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test: /\.(js|jsx|mjs)$/,
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include: paths.appSrc,
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loader: require.resolve('babel-loader'),
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options: {
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// This is a feature of `babel-loader` for webpack (not Babel itself).
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// It enables caching results in ./node_modules/.cache/babel-loader/
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// directory for faster rebuilds.
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cacheDirectory: true,
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},
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},
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// "postcss" loader applies autoprefixer to our CSS.
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// "css" loader resolves paths in CSS and adds assets as dependencies.
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// "style" loader turns CSS into JS modules that inject <style> tags.
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// In production, we use a plugin to extract that CSS to a file, but
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// in development "style" loader enables hot editing of CSS.
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{
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test: /\.css$/,
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use: [
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require.resolve('style-loader'),
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{
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loader: require.resolve('css-loader'),
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options: {
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importLoaders: 1,
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},
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},
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{
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loader: require.resolve('postcss-loader'),
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options: {
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// Necessary for external CSS imports to work
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// https://github.com/facebookincubator/create-react-app/issues/2677
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ident: 'postcss',
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plugins: () => [
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require('postcss-flexbugs-fixes'),
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autoprefixer({
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browsers: [
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'>1%',
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'last 4 versions',
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'Firefox ESR',
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'not ie < 9', // React doesn't support IE8 anyway
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],
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flexbox: 'no-2009',
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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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// "file" loader makes sure those assets get served by WebpackDevServer.
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// When you `import` an asset, you get its (virtual) filename.
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// In production, they would get copied to the `build` folder.
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// This loader doesn't use a "test" so it will catch all modules
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// that fall through the other loaders.
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{
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// Exclude `js` files to keep "css" loader working as it injects
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// its runtime that would otherwise processed through "file" loader.
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// Also exclude `html` and `json` extensions so they get processed
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// by webpacks internal loaders.
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exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/],
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loader: require.resolve('file-loader'),
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options: {
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name: 'static/media/[name].[hash:8].[ext]',
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},
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},
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],
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},
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// ** STOP ** Are you adding a new loader?
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// Make sure to add the new loader(s) before the "file" loader.
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],
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},
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plugins: [
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// Makes some environment variables available in index.html.
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// The public URL is available as %PUBLIC_URL% in index.html, e.g.:
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// <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
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// In development, this will be an empty string.
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new InterpolateHtmlPlugin(env.raw),
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// Generates an `index.html` file with the <script> injected.
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new HtmlWebpackPlugin({
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inject: true,
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template: paths.appHtml,
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}),
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// Add module names to factory functions so they appear in browser profiler.
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new webpack.NamedModulesPlugin(),
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// Makes some environment variables available to the JS code, for example:
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// if (process.env.NODE_ENV === 'development') { ... }. See `./env.js`.
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new webpack.DefinePlugin(env.stringified),
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// This is necessary to emit hot updates (currently CSS only):
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new webpack.HotModuleReplacementPlugin(),
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// Watcher doesn't work well if you mistype casing in a path so we use
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// a plugin that prints an error when you attempt to do this.
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// See https://github.com/facebookincubator/create-react-app/issues/240
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new CaseSensitivePathsPlugin(),
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// If you require a missing module and then `npm install` it, you still have
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// to restart the development server for Webpack to discover it. This plugin
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// makes the discovery automatic so you don't have to restart.
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// See https://github.com/facebookincubator/create-react-app/issues/186
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new WatchMissingNodeModulesPlugin(paths.appNodeModules),
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// Moment.js is an extremely popular library that bundles large locale files
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// by default due to how Webpack interprets its code. This is a practical
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// solution that requires the user to opt into importing specific locales.
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// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
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// You can remove this if you don't use Moment.js:
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new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
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new MonacoWebpackPlugin(),
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],
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// Some libraries import Node modules but don't use them in the browser.
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// Tell Webpack to provide empty mocks for them so importing them works.
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node: {
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dgram: 'empty',
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fs: 'empty',
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net: 'empty',
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tls: 'empty',
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child_process: 'empty',
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},
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// Turn off performance hints during development because we don't do any
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// splitting or minification in interest of speed. These warnings become
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// cumbersome.
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performance: {
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hints: false,
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},
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};
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