前言
有一个项目需要引入图表，当时有两种选择一种是mpvue-echarts，一种是F2，而我经过踩坑之后依然决然的选择了mpvue-echarts，简单快捷容易上手，主要之前用过比较熟悉。
问题 | 解决
引入后突然发现，打包的时候出问题了，vendor太大了！看了引入的才发现引入的echarts太大了，然后换成了压缩版的！
import * as echarts from 'echarts/dist/echarts.min'
引入后再打包少了2M左右但是还是大啊,查看了webpack后发现,因为是开发环境,所以没进行UglifyJs压缩,所以解决的方法来了,引入UglifyJs插件
修改build目录下 的webpack.dev.conf.js配置文件
var UglifyJsPlugin = require('uglifyjs-webpack-plugin')
new UglifyJsPlugin({
sourceMap: true
})
完整配置
/*
* @Author: wangyang
* @LastEditors: wangyang
* @Description: file content
* @Date: 2019-03-29 10:11:14
* @LastEditTime: 2019-04-09 23:32:43
*/
var utils = require('./utils')
var webpack = require('webpack')
var config = require('../config')
var merge = require('webpack-merge')
var baseWebpackConfig = require('./webpack.base.conf')
// var HtmlWebpackPlugin = require('html-webpack-plugin')
var FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
var MpvueVendorPlugin = require('webpack-mpvue-vendor-plugin') // copy from ./webpack.prod.conf.js
var path = require('path')
var UglifyJsPlugin = require('uglifyjs-webpack-plugin')
var ExtractTextPlugin = require('extract-text-webpack-plugin')
var CopyWebpackPlugin = require('copy-webpack-plugin')
var OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin') // add hot-reload related code to entry chunks
// Object.keys(baseWebpackConfig.entry).forEach(function (name) {
// baseWebpackConfig.entry[name] = ['./build/dev-client'].concat(baseWebpackConfig.entry[name])
// }) module.exports = merge(baseWebpackConfig, {
module: {
rules: utils.styleLoaders({
sourceMap: config.dev.cssSourceMap,
extract: true
})
},
// cheap-module-eval-source-map is faster for development
// devtool: '#cheap-module-eval-source-map',
// devtool: '#source-map',
output: {
path: config.build.assetsRoot,
// filename: utils.assetsPath('[name].[chunkhash].js'),
// chunkFilename: utils.assetsPath('[id].[chunkhash].js')
filename: utils.assetsPath('[name].js'),
chunkFilename: utils.assetsPath('[id].js')
},
plugins: [
new webpack.DefinePlugin({
'process.env': config.dev.env
}), // copy from ./webpack.prod.conf.js
// extract css into its own file
new ExtractTextPlugin({
// filename: utils.assetsPath('[name].[contenthash].css')
filename: utils.assetsPath(`[name].${config.dev.fileExt.style}`)
}),
// Compress extracted CSS. We are using this plugin so that possible
// duplicated CSS from different components can be deduped.
new OptimizeCSSPlugin({
cssProcessorOptions: {
safe: true
}
}),
new webpack.optimize.CommonsChunkPlugin({
name: 'common/vendor',
minChunks: function (module, count) {
// any required modules inside node_modules are extracted to vendor
return (
module.resource &&
/\.js$/.test(module.resource) &&
module.resource.indexOf('node_modules') >= 0
) || count > 1
}
}),
new webpack.optimize.CommonsChunkPlugin({
name: 'common/manifest',
chunks: ['common/vendor']
}),
new MpvueVendorPlugin({
platform: process.env.PLATFORM
}),
// https://github.com/glenjamin/webpack-hot-middleware#installation--usage
// new webpack.HotModuleReplacementPlugin(),
new webpack.NoEmitOnErrorsPlugin(),
// https://github.com/ampedandwired/html-webpack-plugin
// new HtmlWebpackPlugin({
// filename: 'index.html',
// template: 'index.html',
// inject: true
// }),
new FriendlyErrorsPlugin(),
new UglifyJsPlugin({
sourceMap: true
})
]
})
再次运行npm run dev | npm run build 后发现vendor只有800k左右