当我捆绑主文件时,我使用webpack bundle my angular 2项目。文件太大,文件大小约为8M。然后每当我刷新页面时,浏览器都会有很长时间加载并执行javascript文件。 我认为可能有太多我不需要的文件,但我怎样才能找到它并将其从我的捆绑文件中删除? 谢谢你给我一些建议或帮助。
这是我的webpack配置的主要部分: webpack.common.js:
const webpack = require('webpack');
const helpers = require('./helpers');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ForkCheckerPlugin = require('awesome-typescript-loader').ForkCheckerPlugin;
module.exports = {
baseUrl: './',
entry: {
// 'polyfills': './src/polyfills.ts',
// 'vendor': './src/vendor.ts',
'main': './src/main.ts'
},
resolve: {
extensions: ['', '.ts', '.js', '.json'],
root: helpers.root('src'),
modulesDirectories: ['node_modules'],
},
module: {
loaders: [
{
test: /\.ts$/,
loaders: ['awesome-typescript-loader', 'angular2-template-loader'],
exclude: [/\.(spec|e2e)\.ts$/]
},
{
test: /\.json$/,
loader: 'json-loader'
},
{
test: /\.css$/,
loaders: ['raw-loader']
},
{
test: /\.html$/,
loader: 'raw-loader',
exclude: [helpers.root('src/index.html')]
},
{
test: /\.scss$/,
loaders: ['raw-loader', 'sass-loader'] // sass-loader not scss-loader
},
{
test: /\.(jpg|png|gif)$/,
loader: 'file'
},
{
test: /.(png|woff(2)?|eot|ttf|svg)$/,
loader: 'url-loader'
}
]
},
plugins: [
new ForkCheckerPlugin(),
// new CopyWebpackPlugin([
// {from: 'src/assets', to: 'assets'},
// {from: 'src/app/i18n', to: 'app/i18n'},
// {from: 'src/loading.css', to: 'loading.css'},
// {from: 'src/fonts', to: 'fonts'},
// {from: 'src/favicon.ico', to: ''},
// {from: 'src/img', to: 'img'}]),
new HtmlWebpackPlugin({
template: 'src/index.html',
chunksSortMode: 'dependency'
})
],
node: {
global: 'window',
crypto: 'empty',
process: true,
module: false,
clearImmediate: false,
setImmediate: false
}
};
webpack.prod.js
const helpers = require('./helpers');
const webpackMerge = require('webpack-merge'); // used to merge webpack configs
const commonConfig = require('./webpack.common.js'); // the settings that are common to prod and dev
/**
* Webpack Plugins
*/
const webpack = require('webpack');
const ProvidePlugin = require('webpack/lib/ProvidePlugin');
const DefinePlugin = require('webpack/lib/DefinePlugin');
const NormalModuleReplacementPlugin = require('webpack/lib/NormalModuleReplacementPlugin');
const IgnorePlugin = require('webpack/lib/IgnorePlugin');
const DedupePlugin = require('webpack/lib/optimize/DedupePlugin');
const UglifyJsPlugin = require('webpack/lib/optimize/UglifyJsPlugin');
const ForkCheckerPlugin = require('awesome-typescript-loader').ForkCheckerPlugin;
const ENV = process.env.NODE_ENV = process.env.ENV = 'production';
const HOST = process.env.HOST || 'localhost';
module.exports = webpackMerge(commonConfig, {
devtool: 'source-map',
output: {
path: helpers.root('dist'),
filename: '[name].bundle.js',
chunkFilename: '[id].chunk.js'
},
plugins: [
// new webpack.NoErrorsPlugin(), // 如果出现任何错误 就终止构建
// new DedupePlugin(), // 检测完全相同(以及几乎完全相同)的文件 并把它们从输出中移除
// new webpack.optimize.CommonsChunkPlugin({
// name: ['polyfills', 'vendor', 'main'].reverse()
// }),
new UglifyJsPlugin({
beautify: false,
mangle: { screw_ie8 : true, keep_fnames: true },
compress: { screw_ie8: true, warnings: false },
comments: false
}),
// new ExtractTextPlugin('[name].[hash].css'), // 把内嵌的 css 抽取成玩不文件 并为其文件名添加 hash 后缀 使得浏览端缓存失效
new DefinePlugin({ // 定义环境变量
'process.env': {
ENV: JSON.stringify(ENV)
}
}),
],
htmlLoader: {
minimize: true,
removeAttributeQuotes: false,
caseSensitive: true,
customAttrSurround: [
[/#/, /(?:)/],
[/\*/, /(?:)/],
[/\[?\(?/, /(?:)/]
],
customAttrAssign: [/\)?\]?=/]
},
tslint: {
emitErrors: true,
failOnHint: true,
resourcePath: 'src'
},
node: {
global: 'window',
crypto: 'empty',
process: false,
module: false,
clearImmediate: false,
setImmediate: false
}
});
我删除了我的vendor.ts文件 这是我的polyfills.ts
// This file includes polyfills needed by Angular 2 and is loaded before
// the app. You can add your own extra polyfills to this file.
// Added parts of es6 which are necessary for your project or your browser support requirements.
import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/set';
import 'core-js/es6/reflect';
import 'core-js/es6/weak-map';
import 'core-js/es6/weak-set';
import 'core-js/es7/reflect';
import 'zone.js/dist/zone';
答案 0 :(得分:11)
我前几天尝试使用角度2,我遇到了和你一样的问题,我的vendor.js是6M,这是一个简单的“Hello World”应用......
我发现以下帖子有助于理解我们应如何对此问题采取行动(目前): http://blog.mgechev.com/2016/06/26/tree-shaking-angular2-production-build-rollup-javascript/
他在他的1.5M应用程序上使用了几种优化和压缩技术(预编译,treeshake,minify,bundle和gzip),将其大小减小到50kb。
检查出来,希望它有所帮助! :)
修改强> 从那以后我就和Angular进行了一些运行,对我而言,最好的工作方法是使用angular-cli,当我写这篇文章的时候是v1.0,当你使用--prod运行它时我在原帖+通常的网络服务器中写的所有内容都会压缩你的文件。我的完整网站不到1MB,他有很多功能,还有很多第三方的东西。
答案 1 :(得分:-3)
angular 2支持lazyLoad路由组件;您可以使用 angular2-router-loader
或者你可以使用webpack split config;
您还可以使用ato / uglify压缩代码;
希望这个答案可以帮到你。