import ExtractTextPlugin from 'extract-text-webpack-plugin' import { join } from 'path' import postcssConfig from './postcss' export default function styleLoader(ext, loaders = [], isVueLoader = false) { const sourceMap = Boolean(this.options.build.cssSourceMap) // Normalize loaders loaders = (Array.isArray(loaders) ? loaders : [loaders]).map(loader => Object.assign( { options: { sourceMap } }, typeof loader === 'string' ? { loader } : loader ) ) // Prepare vue-style-loader // https://github.com/vuejs/vue-style-loader const vueStyleLoader = { loader: 'vue-style-loader', options: { sourceMap } } // -- Configure additional loaders -- // style-resources-loader // https://github.com/yenshih/style-resources-loader if (this.options.build.styleResources[ext]) { const patterns = Array.isArray(this.options.build.styleResources[ext]) ? this.options.build.styleResources[ext] : [this.options.build.styleResources[ext]] const options = Object.assign( {}, this.options.build.styleResources.options || {}, { patterns } ) loaders.push({ loader: 'style-resources-loader', options }) } // postcss-loader // vue-loader already provides it's own // https://github.com/postcss/postcss-loader if (!isVueLoader) { const _postcssConfig = postcssConfig.call(this) if (_postcssConfig) { loaders.unshift({ loader: 'postcss-loader', options: Object.assign({ sourceMap }, _postcssConfig) }) } } // css-loader // https://github.com/webpack-contrib/css-loader const cssLoaderAlias = {} cssLoaderAlias[`/${this.options.dir.assets}`] = join(this.options.srcDir, this.options.dir.assets) cssLoaderAlias[`/${this.options.dir.static}`] = join(this.options.srcDir, this.options.dir.static) loaders.unshift({ loader: 'css-loader', options: { sourceMap, minimize: !this.options.dev, importLoaders: loaders.length, // Important! alias: cssLoaderAlias } }) // -- With extractCSS -- // TODO: Temporary disabled in dev mode for fixing source maps // (We need `source-map` devtool for *.css modules) if (this.options.build.extractCSS && !this.options.dev) { // ExtractTextPlugin // https://github.com/webpack-contrib/extract-text-webpack-plugin const extractLoader = ExtractTextPlugin.extract({ use: loaders, fallback: vueStyleLoader }) // css-hot-loader // https://github.com/shepherdwind/css-hot-loader const hotLoader = { loader: 'css-hot-loader', options: { sourceMap } } return this.options.dev ? [hotLoader].concat(extractLoader) : extractLoader } // -- Without extractCSS -- return [vueStyleLoader].concat(loaders) }