使用 Webpack 在 Visual Studio 中调试 Angular 2 很慢

Question

我正在运行ning Visual Studio 2015 Update 3，ASP.Net MVC 4.6.1，Angular 2.4.6，Webpack 2.2.1 和 webpack Task Runner资源管理器扩展。如果我运行 Visual Studio 没有调试它一切正常，但如果我尝试运行 Visual Studio 在调试模式下它需要几分钟才能加载网页。查看 Visual Studio 它正在尝试加载 Angular 的源地图，每个都需要几秒钟。

问题似乎是因为 Task Runner Explorer 插件正在运行执行命令：webpack -d --watch --color，它告诉它始终为所有内容生成源映射。看起来没有办法将插件更改为不运行“-d”开关。在我的配置文件中，我将其配置为仅为我的代码生成源映射。但似乎命令行总是覆盖配置文件中的内容。

有没有人解决这个问题？

tsconfig.json

{
"compileOnSave": true,
"compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [ "es2015", "dom" ],
    "noImplicitAny": true,
    "suppressImplicitAnyIndexErrors": true
  }
}

webpack.dev.js

var webpackMerge = require('webpack-merge');
var webpack = require('webpack');
var commonConfig = require('./webpack.common.js');

module.exports = webpackMerge(commonConfig, {

    output: {
        path: '\dist',
        publicPath: 'http://localhost:8080/',
        filename: '[name].js',
        sourceMapFilename: '[name].js.map',
        chunkFilename: '[id].chunk.js'
    },

    plugins: [
        new webpack.SourceMapDevToolPlugin({
            test: [/\.js$/, /\.ts$/],
            columns: false,
            filename: '[file].map',
            exclude: ['vendor.js', 'polyfills'],
            lineToLine: false,
            module: true,
            append: '\n//# sourceMappingURL=[url]'
        })
    ],

    devServer: {
        historyApiFallback: true,
        stats: 'minimal'
    }
});

webpack.common.js

"use strict";

var webpack = require('webpack');
var helpers = require('./helpers.js');
var path = require('path');

module.exports = {
    entry: {
        app: "./app/main.ts",
        vendor: "./app/config/vendor.ts",
        polyfills: "./app/config/polyfills.ts"
    },
    resolve: {
        extensions: ['.ts', '.js']
    },
    devServer: {
        contentBase: ".",
        host: "localhost",
        port: 9000
    },
    module: {
        rules: [
        {
            test: /\.ts$/,
            loaders: ['awesome-typescript-loader',
                'angular2-template-loader',
                'tslint-loader']
        },
        {
            test: /\.html$/,
            loader: 'raw-loader'
        },
        {
            test: /\.css$/,
            include: helpers.root('app'),
            loaders: 'style-loader!css-loader'
        },
        {
            test: /\.js$/,
            use: ["source-map-loader"], /*strips off extra # sourceMappingURL= which were in node_modules*/
            enforce: "pre",
            exclude: [
              // these packages have problems with their sourcemaps
              path.resolve('./node_modules/ng2-interceptors')
            ]
        }
        ]
    },
    plugins: [
        // Workaround for angular/angular#11580
        new webpack.ContextReplacementPlugin(
        // The (\|\/) piece accounts for path separators in *nix and Windows
        /angular(\|\/)core(\|\/)(esm(\|\/)src|src)(\|\/)linker/,
        helpers.root('./'), // location of your src
        {} // a map of your routes
        ),
        new webpack.optimize.CommonsChunkPlugin({
            name: ['app', 'vendor', 'polyfills']
        })
    ]

}

Answer 1

问题最终是由于所有 Vendor 和 Polyfill 文件导致的源映射太多，VS 加载时间太长。一旦我告诉它不再为它们生成源地图，它就会开始变得更快。

使用 Webpack 在 Visual Studio 中调试 Angular 2 很慢

Debugging Angular 2 in Visual Studio Slow with Webpack

asp.net-mvc-4

webpack

visual-studio-2015

task-runner-explorer

angular