Angular6 热加载配置方案，分享给大家，具体如下：
示例 ng 版本如下 ：
$ ng --version _ _ ____ _ ___ / \ _ __ __ _ _ _| | __ _ _ __ / ___| | |_ _| / △ \ | '_ \ / _` | | | | |/ _` | '__| | | | | | | / ___ \| | | | (_| | |_| | | (_| | | | |___| |___ | | /_/ \_\_| |_|\__, |\__,_|_|\__,_|_| \____|_____|___| |___/ Angular CLI: 6.0.8 Node: 8.11.1 OS: win32 x64 Angular: 6.1.3 ... animations, common, compiler, compiler-cli, core, forms ... http, language-service, platform-browser ... platform-browser-dynamic, router Package Version ----------------------------------------------------------- @angular-devkit/architect 0.6.8 @angular-devkit/build-angular 0.6.8 @angular-devkit/build-optimizer 0.6.8 @angular-devkit/core 0.6.8 @angular-devkit/schematics 0.6.8 @angular/cli 6.0.8 @ngtools/webpack 6.0.8 @schematics/angular 0.6.8 @schematics/update 0.6.8 rxjs 6.2.2 typescript 2.7.2 webpack 4.8.3
安装 hmr 依赖包
npm install --save-dev @angularclass/hmr --registry https://registry.npm.taobao.org
配置 hmr 文件
在 src/environments 目录下添加 environment.hmr.ts 配置文件
文件内容如下 ：
export const environment = { production: false, hmr: true };
然后分别在 environment.prod.ts 和 environment.ts 添加 hmr:false 配置项
配置 src/tsconfig.app.json 文件
"compilerOptions": { ... "types": ["node"] }
如果不配置上面的 "types":["node"], 则会报错
ERROR in src/main.ts(16,7): error TS2304: Cannot find name 'module'.
src/main.ts(17,18): error TS2304: Cannot find name 'module'.
配置 src/hmr.ts 文件内容如下
import { NgModuleRef, ApplicationRef } from "@angular/core"; import { createNewHosts } from "@angularclass/hmr"; export const hmrBootstrap = ( module: any, bootstrap: () => Promise<NgModuleRef<any>> ) => { let ngModule: NgModuleRef<any>; module.hot.accept(); bootstrap().then(mod => (ngModule = mod)); module.hot.dispose(() => { const appRef: ApplicationRef = ngModule.injector.get(ApplicationRef); const elements = appRef.components.map(c => c.location.nativeElement); const makeVisible = createNewHosts(elements); ngModule.destroy(); makeVisible(); }); };
更新 src/main.ts 文件内容如下
import { enableProdMode } from "@angular/core"; import { platformBrowserDynamic } from "@angular/platform-browser-dynamic"; import { AppModule } from "./app/app.module"; import { environment } from "./environments/environment"; import { hmrBootstrap } from "./hmr"; if (environment.production) { enableProdMode(); } const bootstrap = () => platformBrowserDynamic().bootstrapModule(AppModule); if (environment.hmr) { if (module["hot"]) { hmrBootstrap(module, bootstrap); } else { console.error("HMR is not enabled for webpack-dev-server!"); console.log("Are you using the --hmr flag for ng serve?"); } } else { bootstrap().catch(err => console.log(err)); }
配置 angular.json 文件
... "build": { "builder": "@angular-devkit/build-angular:browser", "options": { "outputPath": "dist/ng6", "index": "src/index.html", "main": "src/main.ts", "polyfills": "src/polyfills.ts", "tsConfig": "src/tsconfig.app.json", "assets": ["src/favicon.ico", "src/assets"], "styles": ["src/styles.css"], "scripts": [] }, "configurations": { "hmr": { "fileReplacements": [ { "replace": "src/environments/environment.ts", "with": "src/environments/environment.hmr.ts" } ] }, "production": { "fileReplacements": [ { "replace": "src/environments/environment.ts", "with": "src/environments/environment.prod.ts" } ], "optimization": true, "outputHashing": "all", "sourceMap": false, "extractCss": true, "namedChunks": false, "aot": true, "extractLicenses": true, "vendorChunk": false, "buildOptimizer": true } } }, ... "serve": { "builder": "@angular-devkit/build-angular:dev-server", "options": { "browserTarget": "ng6:build" }, "configurations": { "production": { "browserTarget": "ng6:build:production" }, "hmr": { "browserTarget": "ng6:build:hmr", "hmr": true } } },
启动应用
方式一：ng serve --configuration hmr
方式二：ng run ng6:serve:hmr