Angular 配置loader

1. 修改 Angular CLI webpack 配置

1.1 安装 @angular-builders/custom-webpack

npm install -D @angular-builders/custom-webpack

1.2 新建 webpack 配置文件extra-webpack.config.js并写入配置信息

module.exports = {
  // webpack config
};

1.3 修改angular.json

"architect": {
        "build": {
-		   "builder": "@angular-devkit/build-angular:browser",
+          "builder": "@angular-builders/custom-webpack:browser", // <=
+          "options": {
+            "customWebpackConfig": {  // <=
+              "path": "./extra-webpack.config.js",  // <=
+              "mergeRules": {  // <=
+                "externals": "replace"  // <=
+              }  // <=
            },
			// ....
		"serve": {
-          "builder": "@angular-devkit/build-angular:dev-server",
+          "builder": "@angular-builders/custom-webpack:dev-server",
           "options": {
+            "browserTarget": "你的项目名:build",
			 // ...
          }
		}

1.4 重启项目

2. angular 中使用 require.context 和配置 loader

2.1 安装@types/webpack-env

npm i -D @types/webpack-env

2.2 修改tsconfig.app.json

 "compilerOptions": {
    "outDir": "./out-tsc/app",
+    "typeRoots": ["node_modules/@types", "./types"],
     "types": [
+      "webpack-env"
     ]
  },

2.3 配置相应loader(file-loader为例)

npm i -D file-loader

// extra-webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.svg$/,
        use: ["file-loader"],
      },
    ],
  },
};

2.4 Usage

const file = require.context("src/assets/image/pc/", false, /\.svg$/);
// ...