应用角4的光阑Webpack (SCSS)

Question

对不起，这是另一个webpack/scss/sass的问题。寻找答案让我头晕目眩，尤其是对webpack和角尚不熟悉。

我想使用sass/scss文件与我已经创建的使用VisualStudio2017 ASP.NET核心角项目模板创建的角4应用程序。

从盒子里出来，它会生成文件让你开始工作。我只想为app.component - app.component.scss创建一个新的scss文件。

我已经这样做了，并试图最好地猜测如何获得一些东西来操作scss文件。我完全不清楚什么是必需的。我看到网络上的大多数例子都使用了sass-loader，但是它们有不同的配置--这确实让我感到困惑。

所以我在这里发出了一个很大的求救信号。要让scss文件在我的场景中工作，我需要做什么？

以下是我所拥有的：

package.json

这是从Visual模板生成的初始文件：

{
  "name": "AngularShell_Web",
  "private": true,
  "version": "0.0.0",
  "scripts": {
    "test": "karma start ClientApp/test/karma.conf.js"
  },
  "dependencies": {
    "@angular/animations": "4.2.5",
    "@angular/common": "4.2.5",
    "@angular/compiler": "4.2.5",
    "@angular/compiler-cli": "4.2.5",
    "@angular/core": "4.2.5",
    "@angular/forms": "4.2.5",
    "@angular/http": "4.2.5",
    "@angular/platform-browser": "4.2.5",
    "@angular/platform-browser-dynamic": "4.2.5",
    "@angular/platform-server": "4.2.5",
    "@angular/router": "4.2.5",
    "@ngtools/webpack": "1.5.0",
    "@types/webpack-env": "1.13.0",
    "angular2-template-loader": "0.6.2",
    "aspnet-prerendering": "^3.0.1",
    "aspnet-webpack": "^2.0.1",
    "awesome-typescript-loader": "3.2.1",
    "bootstrap": "3.3.7",
    "css": "2.2.1",
    "css-loader": "0.28.4",
    "es6-shim": "0.35.3",
    "event-source-polyfill": "0.0.9",
    "expose-loader": "0.7.3",
    "extract-text-webpack-plugin": "2.1.2",
    "file-loader": "0.11.2",
    "html-loader": "0.4.5",
    "isomorphic-fetch": "2.2.1",
    "jquery": "3.2.1",
    "json-loader": "0.5.4",
    "preboot": "4.5.2",
    "raw-loader": "0.5.1",
    "reflect-metadata": "0.1.10",
    "rxjs": "5.4.2",
    "style-loader": "0.18.2",
    "to-string-loader": "1.1.5",
    "typescript": "2.4.1",
    "url-loader": "0.5.9",
    "webpack": "2.5.1",
    "webpack-hot-middleware": "2.18.2",
    "webpack-merge": "4.1.0",
    "zone.js": "0.8.12"
  },
  "devDependencies": {
    "@types/chai": "4.0.1",
    "@types/jasmine": "2.5.53",
    "chai": "4.0.2",
    "jasmine-core": "2.6.4",
    "karma": "1.7.0",
    "karma-chai": "0.1.0",
    "karma-chrome-launcher": "2.2.0",
    "karma-cli": "1.0.1",
    "karma-jasmine": "1.1.0",
    "karma-webpack": "2.0.3"
  }
}

我已经使用node和npm install --save-dev安装了以下npm install --save模块

Module       | Version
---------    | -------
node-sass    | ^4.5.3 
sass-loader  | ^6.0.6
style-loader | https://registry.npmjs.org/style-loader/-/style-loader-0.18.2.tgz

注意:不太确定为什么样式加载程序版本是这样的。

app\components\app.component.html

<div class='container-fluid'>
    <div class='row'>
        <div class='col-sm-3'>
            <nav-menu></nav-menu>
        </div>
        <div class='col-sm-9 body-content'>
            <router-outlet></router-outlet>
        </div>
    </div>
</div>

app\components\app.component.css

@media (max-width: 767px) {
    /* On small screens, the nav menu spans the full width of the screen. Leave a space for it. */
    .body-content {
        padding-top: 50px;
    }
}

app.component.ts

import { Component } from '@angular/core';

@Component({
    selector: 'app',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
}

webpack.config.js

这是我尝试的更改，以尝试加载sass：

const path = require('path');
const webpack = require('webpack');
const merge = require('webpack-merge');
const AotPlugin = require('@ngtools/webpack').AotPlugin;
const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;

module.exports = (env) => {
    // Configuration in common to both client-side and server-side bundles
    const isDevBuild = !(env && env.prod);
    const sharedConfig = {
        stats: { modules: false },
        context: __dirname,
        resolve: { extensions: [ '.js', '.ts' ] },
        output: {
            filename: '[name].js',
            publicPath: 'dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
        },
        module: {
            rules: [
                { test: /\.ts$/, include: /ClientApp/, use: isDevBuild ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader'] : '@ngtools/webpack' },
                { test: /\.html$/, use: 'html-loader?minimize=false' },
                { test: /\.css$/, use: [ 'to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize' ] },
                { test: /\.scss$/, use: [ 'to-string-loader', isDevBuild ? 'sass-loader' : 'sass-loader?minimize' ] },
                { test: /\.(png|jpg|jpeg|gif|svg)$/, use: 'url-loader?limit=25000' }
            ]
        },
        plugins: [new CheckerPlugin()]
    };

    // Configuration for client-side bundle suitable for running in browsers
    const clientBundleOutputDir = './wwwroot/dist';
    const clientBundleConfig = merge(sharedConfig, {
        entry: { 'main-client': './ClientApp/boot.browser.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.UglifyJsPlugin(),
            new AotPlugin({
                tsConfigPath: './tsconfig.json',
                entryModule: path.join(__dirname, 'ClientApp/app/app.module.browser#AppModule'),
                exclude: ['./**/*.server.ts']
            })
        ])
    });

    // Configuration for server-side (prerendering) bundle suitable for running in Node
    const serverBundleConfig = merge(sharedConfig, {
        resolve: { mainFields: ['main'] },
        entry: { 'main-server': './ClientApp/boot.server.ts' },
        plugins: [
            new webpack.DllReferencePlugin({
                context: __dirname,
                manifest: require('./ClientApp/dist/vendor-manifest.json'),
                sourceType: 'commonjs2',
                name: './vendor'
            })
        ].concat(isDevBuild ? [] : [
            // Plugins that apply in production builds only
            new AotPlugin({
                tsConfigPath: './tsconfig.json',
                entryModule: path.join(__dirname, 'ClientApp/app/app.module.server#AppModule'),
                exclude: ['./**/*.browser.ts']
            })
        ]),
        output: {
            libraryTarget: 'commonjs',
            path: path.join(__dirname, './ClientApp/dist')
        },
        target: 'node',
        devtool: 'inline-source-map'
    });

    return [clientBundleConfig, serverBundleConfig];
};

webpack.config.vendor.js

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const merge = require('webpack-merge');
const treeShakableModules = [
    '@angular/animations',
    '@angular/common',
    '@angular/compiler',
    '@angular/core',
    '@angular/forms',
    '@angular/http',
    '@angular/platform-browser',
    '@angular/platform-browser-dynamic',
    '@angular/router',
    'zone.js',
];
const nonTreeShakableModules = [
    'bootstrap',
    'bootstrap/dist/css/bootstrap.css',
    'es6-promise',
    'es6-shim',
    'event-source-polyfill',
    'jquery',
];
const allModules = treeShakableModules.concat(nonTreeShakableModules);

module.exports = (env) => {
    const extractCSS = new ExtractTextPlugin('vendor.css');
    const isDevBuild = !(env && env.prod);
    const sharedConfig = {
        stats: { modules: false },
        resolve: { extensions: ['.js'] },
        module: {
            rules: [
                { test: /\.(png|woff|woff2|eot|ttf|svg)(\?|$)/, use: 'url-loader?limit=100000' }
            ]
        },
        output: {
            publicPath: 'dist/',
            filename: '[name].js',
            library: '[name]_[hash]'
        },
        plugins: [
            new webpack.ProvidePlugin({ $: 'jquery', jQuery: 'jquery' }), // Maps these identifiers to the jQuery package (because Bootstrap expects it to be a global variable)
            new webpack.ContextReplacementPlugin(/\@angular\b.*\b(bundles|linker)/, path.join(__dirname, './ClientApp')), // Workaround for https://github.com/angular/angular/issues/11580
            new webpack.ContextReplacementPlugin(/angular(\\|\/)core(\\|\/)@angular/, path.join(__dirname, './ClientApp')), // Workaround for https://github.com/angular/angular/issues/14898
            new webpack.IgnorePlugin(/^vertx$/) // Workaround for https://github.com/stefanpenner/es6-promise/issues/100
        ]
    };

    const clientBundleConfig = merge(sharedConfig, {
        entry: {
            // To keep development builds fast, include all vendor dependencies in the vendor bundle.
            // But for production builds, leave the tree-shakable ones out so the AOT compiler can produce a smaller bundle.
            vendor: isDevBuild ? allModules : nonTreeShakableModules
        },
        output: { path: path.join(__dirname, 'wwwroot', 'dist') },
        module: {
            rules: [
                { test: /\.css(\?|$)/, use: extractCSS.extract({ use: isDevBuild ? 'css-loader' : 'css-loader?minimize' }) },
                { test: /\.scss(\?|$)/, use: extractCSS.extract({ use: isDevBuild ? 'sass-loader' : 'sass-loader?minimize' }) }
            ]
        },
        plugins: [
            extractCSS,
            new webpack.DllPlugin({
                path: path.join(__dirname, 'wwwroot', 'dist', '[name]-manifest.json'),
                name: '[name]_[hash]'
            })
        ].concat(isDevBuild ? [] : [
            new webpack.optimize.UglifyJsPlugin()
        ])
    });

    const serverBundleConfig = merge(sharedConfig, {
        target: 'node',
        resolve: { mainFields: ['main'] },
        entry: { vendor: allModules.concat(['aspnet-prerendering']) },
        output: {
            path: path.join(__dirname, 'ClientApp', 'dist'),
            libraryTarget: 'commonjs2',
        },
        module: {
            rules: [
                    { test: /\.css(\?|$)/, use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize'] },
                    { test: /\.scss(\?|$)/, use: ['to-string-loader', isDevBuild ? 'sass-loader' : 'sass-loader?minimize'] }
            ]
        },
        plugins: [
            new webpack.DllPlugin({
                path: path.join(__dirname, 'ClientApp', 'dist', '[name]-manifest.json'),
                name: '[name]_[hash]'
            })
        ]
    });

    return [clientBundleConfig, serverBundleConfig];
}

更新的app.component.ts

import { Component } from '@angular/core';

@Component({
selector: 'app',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css', './app.component.scss']
})
export class AppComponent {
}

更新的app.component.html

现在已经有了类测试的范围，类测试在sass中定义：

<div class='container-fluid'>
    <div class='row'>
        <div class='col-sm-3'>
            <nav-menu></nav-menu>
        </div>
        <div class='col-sm-9 body-content'>
            <span class="test">Test</span>
            <router-outlet></router-outlet>
        </div>
    </div>
</div>

最后，新的sass文件app.component.scss

我想在我的应用程序中使用这个。

.test {
    color: red;
}

运行应用程序(Visual F5)时，在Chrome中会出现以下错误：

NodeInvocationException: Prerendering failed because of error: Error: Module parse failed:       
G:\vs\AngularLearn\shell\src\AngularShell.Web\node_modules\sass-loader\lib\loader.js!     
G:\vs\AngularLearn\shell\src\AngularShell.Web\ClientApp\app\components\app\app.component.scss Unexpected token (1:0)
You may need an appropriate loader to handle this file type.
| .test {
| color: red; }
| 

这个question可能是相关的，但并没有给我所需要的信息--我仍然很困惑。

Answer 1

看起来您的预录制失败了，这可能是有意义的，因为您在clientBundleConfig中有scss的规则，而不是serverBundleConfig。尝试将相同的规则添加到serverBundleConfig或共享中，就像我拥有的那样：

const sharedConfig = {
    stats: { modules: false },
    context: __dirname,
    resolve: { extensions: [ '.js', '.ts' ] },
    output: {
        filename: '[name].js',
        publicPath: 'dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
    },
    module: {
        rules: [
            { test: /\.ts$/, use: isDevBuild ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader'] : '@ngtools/webpack' },
            { test: /\.html$/, use: 'html-loader?minimize=false' },
            { test: /\.css$/, use: [ 'to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize' ] },
            { test: /\.(png|jpg|jpeg|gif|svg)$/, use: 'url-loader?limit=25000' },
            {
                test: /\.scss$/,
                // exclude: /node_modules/,
                use: extractCSS.extract({
                    use: ['css-loader', 'sass-loader']
                })
            },
        ]
    },
    plugins: [new CheckerPlugin(), extractCSS]
};

Answer 2

sass应该与webpack一起用角自动编译，只需在组件中放置一个.scss，我就可以编译了。