使用服务器端渲染设置webpack来加载asp.net core项目中的Sass文件

Setup webpack with server side rendering to load Sass files in asp.net core project

本文关键字：项目 core net 文件 Sass asp 加载 服务器端 设置 webpack      更新时间：2023-09-26

我正在使用一个名为"aspnetcore-spa"的Yeoman项目模板，这是一个ASP.net core 1模板，与主要的SPA框架(Angular2和React)结合使用。

我用Angular2创建了一个项目。生物模板的代码工作得很好，没有问题。一旦我将Sass加载器添加到webpack.config.js中，并从任何angular文件中引用Sass文件。

在webpack.config.js中: 
var isDevBuild = process.argv.indexOf('--env.prod') < 0;
var path = require('path');
var webpack = require('webpack');
var nodeExternals = require('webpack-node-externals');
var merge = require('webpack-merge');
var allFilenamesExceptJavaScript = /'.(?!js('?|$))([^.]+('?|$))/;
// Configuration in common to both client-side and server-side bundles
var sharedConfig = {
    resolve: { extensions: [ '', '.js', '.ts' ] },
    output: {
        filename: '[name].js',
        publicPath: '/dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
    },
    module: {
        loaders: [
            { test: /'.ts$/, include: /ClientApp/, loader: 'ts', query: { silent: true } },
            { test: /'.scss$/,include:/ClientApp/, loaders: ["style", "css", "sass"] },
            { test: /'.html$/,include: /ClientApp/, loader: 'raw' },
            { test: /'.css$/, loader: 'to-string!css' },
            { test: /'.(png|jpg|jpeg|gif|svg)$/, loader: 'url', query: { limit: 25000 } }
        ]
    }
};
// Configuration for client-side bundle suitable for running in browsers
var clientBundleOutputDir = './wwwroot/dist';
var clientBundleConfig = merge(sharedConfig, {
    entry: { 'main-client': './ClientApp/boot-client.ts' },
    output: { path: path.join(__dirname, clientBundleOutputDir) },
    plugins: [
        new webpack.DllReferencePlugin({
            context: __dirname,
            manifest: require('./wwwroot/dist/vendor-manifest.json')
        })
    ].concat(isDevBuild ? [
        // Plugins that apply in development builds only
        new webpack.SourceMapDevToolPlugin({
            filename: '[file].map', // Remove this line if you prefer inline source maps
            moduleFilenameTemplate: path.relative(clientBundleOutputDir, '[resourcePath]') // Point sourcemap entries to the original file locations on disk
        })
    ] : [
        // Plugins that apply in production builds only
        new webpack.optimize.OccurenceOrderPlugin(),
        new webpack.optimize.UglifyJsPlugin()
    ])
});
// Configuration for server-side (prerendering) bundle suitable for running in Node
var serverBundleConfig = merge(sharedConfig, {
    entry: { 'main-server': './ClientApp/boot-server.ts' },
    output: {
        libraryTarget: 'commonjs',
        path: path.join(__dirname, './ClientApp/dist')
    },
    target: 'node',
    devtool: 'inline-source-map',
    externals: [nodeExternals({ whitelist: [allFilenamesExceptJavaScript] })] // Don't bundle .js files from node_modules
});
module.exports = [clientBundleConfig, serverBundleConfig];

在我的组件中:

import { Component, OnInit } from '@angular/core';
@Component({
  selector: 'app-wine',
  template: require('./wine.component.html'),
  styles: require('./wine.component.scss')
})
export class WineComponent implements OnInit {
  constructor() { }
  ngOnInit() {
  }
}

我已经安装了与sass loader相关的npm包:

npm install node-sass sass-loader --save-dev

我检查了wwwroot/dist文件夹中的main-server.js文件，这是webpack捆绑的结果，我看到。scss文件被加载，它们的样式被正确处理。一旦我运行应用程序，显示这个异常，这是来自服务器端渲染端:

处理请求时发生未处理的异常。

异常:调用Node模块失败，错误:ReferenceError:窗口未定义在E:'Dev'MyApp'MyAppCore'src'MyApp. web 'ClientApp'dist'main-server.js:573:31 at E:'Dev'MyApp'MyAppCore'src'MyApp. web 'ClientApp'dist'main-server.js:568:48 at module。(E:'Dev'MyApp'MyAppCore'src'MyApp. web 'ClientApp'dist'main-server.js:590:69)(E: '开发' MyApp ' MyAppCore ' src ' MyApp.Web ' ClientApp ' dist ' main-server.js: 526:38)在 webpack_require (E: '开发' MyApp ' MyAppCore ' src ' MyApp.Web ' ClientApp ' dist ' main-server.js: 20:30)在E: '开发' MyApp ' MyAppCore ' src ' MyApp.Web ' ClientApp ' dist ' main-server.js: 501:22在Object.module.exports (E: '开发' MyApp ' MyAppCore ' src ' MyApp.Web ' ClientApp ' dist ' main-server.js: 506:3)在 webpack_require (E: '开发' MyApp ' MyAppCore ' src ' MyApp.Web ' ClientApp ' dist ' main-server.js: 20:30)对象。(E:'Dev'MyApp'MyAppCore'src'MyApp. web 'ClientApp'dist'main-server.js:129:25) at webpack_require (E:'Dev'MyApp'MyAppCore'src'MyApp. web 'ClientApp'dist'main-server.js:20:30)

这显然是因为webpack的服务器端渲染，因为它在node. js端运行代码(通过ASP.net Core的Javascript服务)，并且有一个代码与DOM window对象相结合，在节点上无效。

什么线索吗?

我设法解决了这个问题，这里是web.config.js位:

(注意.scss文件的加载器)

module: {
        loaders: [
            { test: /'.ts$/, include: /ClientApp/, loader: 'ts', query: { silent: true } },
            { test: /'.scss$/,include:/ClientApp/, loaders: ["to-string", "css", "sass"] },
            { test: /'.html$/,include: /ClientApp/, loader: 'raw' },
            { test: /'.css$/, loader: 'to-string!css' },
            { test: /'.(png|jpg|jpeg|gif|svg)$/, loader: 'url', query: { limit: 25000 } }
        ]
    }

在Angular组件中，我把样式改成了:

(传递所需的css文件数组而不是单个css文件)

@Component({
  selector: 'app-wine',
  template: require('./wine.component.html'),
  styles: [require('./wine.component.scss')]
})
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