Angular通用应用的子路由可能会导致渲染缓慢的问题。要解决此问题,可以使用预渲染方式以减少客户端渲染的需求。预渲染可以提高应用程序的速度和性能,并缩短用户等待时间。
以下是一些代码示例:
npm install @nguniversal/prerendering --save
import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader'; import { renderModule, renderModuleFactory } from '@nguniversal/render-factory'; import * as fs from 'fs';
...
const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./main.server');
...
app.get('/*', async (req, res) => {
// Define routes to prerender const ROUTES_TO_PRERENDER = ['/', '/about', '/contact'];
const indexHtml = fs.readFileSync('./dist/browser/index.html', 'utf-8');
// Define the render options const renderOptions: RenderOptions = { document: indexHtml, url: req.url, bootstrap: AppServerModuleNgFactory, providers: [ provideModuleMap(LAZY_MODULE_MAP), ], };
const html = await renderModuleFactory(renderOptions);
// Send the prerendered HTML to the client res.send(html);
});
const routes: Routes = [ { path: '', component: HomeComponent }, { path: 'about', loadChildren: () => import('./about/about.module').then(m => m.AboutModule) }, { path: 'contact', loadChildren: () => import('./contact/contact.module').then(m => m.ContactModule) }, ];
@NgModule({ imports: [RouterModule.forRoot(routes)], exports: [RouterModule] }) export class AppRoutingModule { }
以上是解决Angular通用应用在子路由上渲染缓慢的方法。