在 asp.net MVC 网络应用程序中捆绑和缩小 ES6 javascript 文件

Question

我们知道 System.Web.optimization 不支持 ES6 javascript 文件打包和缩小，那么如何支持呢？

Answer 1

安装 BuildBundlerMinifier NuGet 包到您的项目。
将具有以下 devDependencies 的 package.json 文件添加到项目的根目录：

{
  "name": "YourProjectName",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "devDependencies": {
    "del": "^3.0.0",
    "gulp": "^4.0.0",
    "gulp-concat": "^2.6.1",
    "gulp-cssmin": "^0.2.0",
    "gulp-htmlmin": "^3.0.0",
    "gulp-terser": "^1.4.0",
    "gulp-uglify": "^3.0.0",
    "merge-stream": "^1.0.1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}

npm i

npm i -g gulp-cli

将下面的gulpfile.js文件添加到项目根目录：

'use strict';

var gulp = require('gulp'),
    concat = require('gulp-concat'),
    cssmin = require('gulp-cssmin'),
    htmlmin = require('gulp-htmlmin'),
    uglify = require('gulp-uglify'),
    merge = require('merge-stream'),
    del = require('del'),
    bundleconfig = require('./bundleconfig.json');
const terser = require('gulp-terser');

const regex = {
    css: /\.css$/,
    html: /\.(html|htm)$/,
    js: /\.js$/
};

gulp.task('min:js', async function () {
    merge(getBundles(regex.js).map(bundle => {
        return gulp.src(bundle.inputFiles, { base: '.' })
            .pipe(concat(bundle.outputFileName))
            //.pipe(uglify())
            .pipe(terser())
            .pipe(gulp.dest('.'));
    }))
});

gulp.task('min:css', async function () {
    merge(getBundles(regex.css).map(bundle => {
        return gulp.src(bundle.inputFiles, { base: '.' })
            .pipe(concat(bundle.outputFileName))
            .pipe(cssmin())
            .pipe(gulp.dest('.'));
    }))
});

gulp.task('min:html', async function () {
    merge(getBundles(regex.html).map(bundle => {
        return gulp.src(bundle.inputFiles, { base: '.' })
            .pipe(concat(bundle.outputFileName))
            .pipe(htmlmin({ collapseWhitespace: true, minifyCSS: true, minifyJS: true }))
            .pipe(gulp.dest('.'));
    }))
});

gulp.task('min', gulp.series(['min:js', 'min:css', 'min:html']));

gulp.task('clean', () => {
    return del(bundleconfig.map(bundle => bundle.outputFileName));
});

gulp.task('watch', () => {
    getBundles(regex.js).forEach(
        bundle => gulp.watch(bundle.inputFiles, gulp.series(["min:js"])));

    getBundles(regex.css).forEach(
        bundle => gulp.watch(bundle.inputFiles, gulp.series(["min:css"])));

    getBundles(regex.html).forEach(
        bundle => gulp.watch(bundle.inputFiles, gulp.series(['min:html'])));
});

const getBundles = (regexPattern) => {
    return bundleconfig.filter(bundle => {
        return regexPattern.test(bundle.outputFileName);
    });
};

gulp.task('default', gulp.series("min"));

在项目的 .csproj 文件中添加以下构建任务：

<Target Name="MyPreCompileTarget" BeforeTargets="Build">   
  <Exec Command="gulp min" />
 </Target>

在项目根目录下添加bundleconfig.json文件（这里可以添加js，css文件需要压缩）：

[
  {
    "outputFileName": "Content/css/site.min.css",
    "inputFiles": [
      "Content/css/site.css"
    ]
  },
  {
    "outputFileName": "Content/js/site.min.js",
    "inputFiles": [
      "Content/js/site.js"
    ],
    "minify": {
      "enabled": true,
      "renameLocals": true
    },
    "sourceMap": false
  }
]

在您的 BundleConfig.cs 中，您可以执行以下操作：

public class BundleConfig
{
    public static void RegisterBundles(BundleCollection bundles)
  {


     bundles.Add(new Bundle("~/Content/css/site").Include(
              "~/Content/css/site.css"));


     bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
                 "~/Content/lib/jquery/jquery-{version}.js"));

     //use Bundle instead of ScriptBundle
     bundles.Add(new Bundle("~/Content/js/site").Include(
                 "~/Content/js/site.js"));

     //disable it for development environment
     if (Environment.Development)
     {
         BundleTable.EnableOptimizations = false;
     }
     else
     {
         BundleTable.EnableOptimizations = true;
     }
 }
}

终于进入你的视野：

@Styles.Render("~/Content/css/site")
@Scripts.Render("~/Content/js/site")

我的回答基于以下 MSDN 资源：

Bundling and Minification

Bundle and minify static assets in ASP.NET Core

在 asp.net MVC 网络应用程序中捆绑和缩小 ES6 javascript 文件

Bundling and minification of ES6 javascript files in an asp.net MVC web application

c#

asp.net

asp.net-mvc

bundling-and-minification

system.web.optimization