我刚刚使用Angular 2(版本rc.2)app(带有Typescript)更新到webpack 2.1.0-beta.15,但我想知道如何使用树摇动功能。我读过它应该“开箱即用”,但我仍然有一个1.7Mb的捆绑用于一个非常简单的应用程序,所以可能我做错了。
这是我到目前为止所做的:
tsconfig.json
{
"compilerOptions": {
"target": "es5",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"removeComments": false,
"noImplicitAny": false
},
"exclude": [
"node_modules",
"typings/main",
"typings/main.d.ts"
]
}
的package.json
{
"name": "angular2-quickstart",
"version": "1.0.0",
"scripts": {
"build": "webpack --progress",
"build:prod": "webpack -p --progress --optimize-minimize",
"postinstall": "typings install",
"serve": "webpack-dev-server --inline --progress --output-public-path=/dist/"
},
"license": "ISC",
"dependencies": {
"@angular/common": "2.0.0-rc.2",
"@angular/compiler": "2.0.0-rc.2",
"@angular/core": "2.0.0-rc.2",
"@angular/forms": "0.1.0",
"@angular/http": "2.0.0-rc.2",
"@angular/platform-browser": "2.0.0-rc.2",
"@angular/platform-browser-dynamic": "2.0.0-rc.2",
"@angular/router": "2.0.0-rc.2",
"@angular/router-deprecated": "2.0.0-rc.2",
"@angular/upgrade": "2.0.0-rc.2",
"angular-pipes": "1.4.0",
"bootstrap": "3.3.6",
"core-js": "2.4.0",
"file-loader": "0.9.0",
"jquery": "2.2.3",
"lodash": "4.13.1",
"reflect-metadata": "0.1.3",
"rxjs": "5.0.0-beta.6",
"script-loader": "0.7.0",
"style-loader": "0.13.1",
"url-loader": "0.5.7",
"zone.js": "0.6.12"
},
"devDependencies": {
"concurrently": "^2.0.0",
"css-loader": "0.23.1",
"html-loader": "0.4.3",
"json-loader": "^0.5.4",
"raw-loader": "0.5.1",
"ts-loader": "0.8.2",
"typescript": "1.8.10",
"typings": "1.0.4",
"webpack": "^2.1.0-beta.15",
"webpack-dev-server": "^2.1.0-beta",
}
}
webpack.config.js
var webpack = require('webpack');
var PROD = JSON.parse(process.env.PROD_ENV || '0');
module.exports = {
entry: './app/main.ts',
output: {
path: './dist',
filename: 'app.bundle.js'
},
module: {
loaders: [
{ test: /\.json$/, loader: 'json', include: [/node_modules/] },
{ test: /\.ts$/, loader: 'ts' },
{ test: /\.html$/, loader: 'html' },
{ test: /\.css$/, loader: 'style!css' },
{ test: /\.(png|woff|woff2|eot|ttf|svg)$/, loader: 'url-loader?limit=100000' }
]
},
resolve: {
extensions: ['', '.js', '.ts', '.css']
},
'htmlLoader': {
caseSensitive: true
},
plugins: PROD ? [
new webpack.optimize.UglifyJsPlugin({
compress: { warnings: false }
})
] : []
}
我正在使用相当标准的导入语句,例如import {FORM_DIRECTIVES,REACTIVE_FORM_DIRECTIVES} from '@angular/forms'
,并尝试仅导入我需要的内容(import 'rxjs/add/operator/map';
)并使用环境变量PROD_ENV = 1运行带npm run build:prod
的构建
像jquery或lodash这样的东西会导致问题(import * as $ from 'jquery'
或import {orderBy} from 'lodash'
),但我相信两者都相对较小。根据{{3}},Jquery和Lodash分别占捆绑规模的6.2%和12%。 Angular使用了49%的束大小。
我错过了什么?
答案 0 :(得分:5)
对于treeshaking,你必须使用typescript 2
npm i typescript@next --save-dev
支持
tsconfig.json
{
"compilerOptions": {
"module": "es6",
"target": "es5"
}
}
这是因为es6模块是静态可分析的,Webpack可以确定使用哪些依赖项,哪些不依赖。
答案 1 :(得分:1)
Tree Shking并未随Webpack 2和is still blocked一起提供,没有明确的前进方向。我担心你可能会穿The Emperor's New Clothes。
答案 2 :(得分:0)
切换到angular-cli目前似乎是继续使用Angular应用程序的方法。它基于webpack,现在甚至支持树摇动功能。只是用
ng build --prod