/**
* Created by imPC on 2017/4/12.
*/
//引入path模块
var path = require('path')
//引入公共配置
var config = require('../config/index')
//分离css插件
var ExtractTextPlugin = require('extract-text-webpack-plugin')
//处理路径
exports.assetsPath = function (_path) {
return path.posix.join(config.build.assetsSubDirectory,_path)
}
//分离css
exports.cssLoaders = function (options) {
options = options || {}
// generate loader string to be used with extract text plugin
function generateLoaders (loaders) {
var sourceLoader = loaders.map(function (loader) {
var extraParamChar
if (/\?/.test(loader)) {
loader = loader.replace(/\?/, '-loader?')
extraParamChar = '&'
} else {
loader = loader + '-loader'
extraParamChar = '?'
}
return loader + (options.sourceMap ? extraParamChar + 'sourceMap' : '')
}).join('!')
if (options.extract) {
return ExtractTextPlugin.extract({
use: sourceLoader,
fallback: 'vue-style-loader'
})
} else {
return ['vue-style-loader', sourceLoader].join('!')
}
}
// http://vuejs.github.io/vue-loader/configurations/extract-css.html
return {
css: generateLoaders(['css']),
postcss: generateLoaders(['css']),
less: generateLoaders(['css', 'less']),
sass: generateLoaders(['css', 'sass?indentedSyntax']),
scss: generateLoaders(['css', 'sass']),
stylus: generateLoaders(['css', 'stylus']),
styl: generateLoaders(['css', 'stylus'])
}
}
//外部css的加载规则
exports.styleLoaders = function (options) {
var output = []
var loaders = exports.cssLoaders(options)
for (var extension in loaders) {
var loader = loaders[extension]
output.push({
test: new RegExp('\\.' + extension + '$'),
loader: loader
})
}
return output
}
webpack解读4(utils)
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