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
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。