如何在 Angular 应用程序中使用路由更改页面标题？

Question

有没有像 React-Helmet 这样的 npm 模块/其他方式允许我们在通过 Angular 应用程序路由时更改页面标题？

PS：我正在使用Angular 5.

Answer 1

您在 Angular 中有一个 TitleService 5. 将其注入到组件的构造函数中，并使用 setTitle() 方法。

import {Title} from "@angular/platform-browser";

....

constructor(private titleService:Title) {
  this.titleService.setTitle("Some title");
}

以下是来自 Angular 的文档：https://angular.io/guide/set-document-title

Answer 2

我更愿意添加包装器 class 只是为了确保如果 import {Title} from "@angular/platform-browser";[=14 我不会在任何地方都改变=] 在即将发布的版本中发生了变化 :) ...也许叫做 "AppTitleService"

import { Injectable } from '@angular/core'; import { Title } from '@angular/platform-browser'; @Injectable({ providedIn: 'root' }) export class AppTitleService { constructor(private titleService: Title) { } getTitle() { this.titleService.getTitle(); } setTitle(newTitle: string) { this.titleService.setTitle(newTitle); } }

Answer 3

这是在 Angular 8 上设置页面标题的测试方法，但您也可以在 Angular 5 上使用它。一旦你设置了这个，你只需要在路由文件上设置标题，所有的都会自动设置。

import { Component } from '@angular/core';
import { ActivatedRoute, Router, NavigationEnd } from '@angular/router';
import { Title } from '@angular/platform-browser';
import { filter, map } from "rxjs/operators";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html'
})
export class AppComponent {

    constructor (private router: Router, private activatedRoute:    ActivatedRoute, private titleService: Title) {
        this.router.events.pipe(
            filter(event => event instanceof NavigationEnd),
            map(() => {
                let child = this.activatedRoute.firstChild;
                while (child) {
                    if (child.firstChild) {
                        child = child.firstChild;
                    } else if (child.snapshot.data &&    child.snapshot.data['title']) {
                        return child.snapshot.data['title'];
                    } else {
                        return null;
                    }
                }
                return null;
            })
        ).subscribe( (data: any) => {
            if (data) {
                this.titleService.setTitle(data + ' - Website Name');
            }
        });
    }

}

在路由文件中你可以这样做：

const routes: Routes = [
    {
        path: 'dashboard',
        component: DefaultDashboardComponent,
        data: {
            title: 'Dashboard'
        }
    }
];

Answer 4

为了动态改变标题，我们可以使用 angular 模块 @angular/platform-browser 并设置标题使用函数 setTitle 函数。

更多详情请查看：platform-browser

Answer 5

// Component.ts

    
    import { Component, OnInit } from '@angular/core';
    import { Router, NavigationEnd, ActivatedRoute } from '@angular/router';
    import { filter } from 'rxjs/operators';
    
    @Component({
      selector: 'app-component',
      templateUrl: './component.html',
      styleUrls: ['./component.css']
    })
    export class Component implements OnInit {
    
      constructor(private router: Router, private route: ActivatedRoute) { }
    
      path: string[] = [];
      pathTitle: string;
    
      ngOnInit() {
        this.router.events.pipe(
          filter(event => event instanceof NavigationEnd)
        ).subscribe((event: NavigationEnd) => {
            this.path = event.url.substring(1).split('/');  //  URL => Whosebug
            this.pathTitle = this.route.root.firstChild.snapshot.data.title; // data.title => stack Overflow
        });
      }
    
    // app-routing.module.ts
    const routes: Routes = [
      { 
        path: 'Whosebug', 
        component: Component, 
        data: {title: 'stack Overflow'}
       }
    ];

Answer 6

这是一个 non-recursive 解决方案，它还修复了在 path-less 或 component-less 嵌套路由的情况下的标题复制问题。

确保将 Angular 的 Title 服务添加到您的应用程序：https://angular.io/guide/set-document-title.

然后在你的app.component.ts

import { Component, OnInit } from '@angular/core';
import { Title } from '@angular/platform-browser';
import { NavigationEnd, Router } from '@angular/router';
import { filter } from 'rxjs/operators';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {

  constructor(
    private readonly router: Router,
    private readonly titleService: Title
  ) { }

  ngOnInit() {
    this.router.events.pipe(
      filter((event) => event instanceof NavigationEnd)
    ).subscribe(() => {
      this.titleService.setTitle(this.getNestedRouteTitles().join(' | '));
    });
  }

  getNestedRouteTitles(): string[] {
    let currentRoute = this.router.routerState.root.firstChild;
    const titles: string[] = [];

    while (currentRoute) {
      if (currentRoute.snapshot.routeConfig.data?.title) {
        titles.push(currentRoute.snapshot.routeConfig.data.title);
      }

      currentRoute = currentRoute.firstChild;
    }

    return titles;
  }

  getLastRouteTitle(): string {
    let currentRoute = this.router.routerState.root.firstChild;

    while (currentRoute.firstChild) {
      currentRoute = currentRoute.firstChild;
    }

    return currentRoute.snapshot.data?.title;
  }
}

访问特定的 routeConfig.data 可防止重复继承的 title 属性。

并且在 main-routing.module.ts 或任何其他路由文件中：

const routes: Routes = [
  {
    path: '',
    component: MainComponent,
    data: { title: 'MyApplication' },
    children: [
      {
        path: '',
        canActivateChild: [AuthGuard],
        children: [
          {
            path: 'dashboard',
            loadChildren: () => import('../dashboard/dashboard.module').then(m => m.DashboardModule),
            data: { title: 'Dashboard' }
          },
          {
            path: 'settings',
            loadChildren: () => import('../settings/settings.module').then(m => m.SettingsModule),
            data: { title: 'Settings' }
          }
        ]
      }
    ]
  }
];

Answer 7

在Angularv14中，有一个built-in策略服务，用于根据主路由器出口从路由中收集标题，并设置浏览器的页面标题。

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { AboutComponent } from './about.component';
import { HomeComponent } from './home.component';

const routes: Routes = [
  {
    path: 'home',
    component: HomeComponent,
    title: "'My App - Home' // <-- Page title"
  },
  {
    path: 'about',
    component: AboutComponent,
    title: "'My App - About Me'  // <-- Page title"
  }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

见here

如何在 Angular 应用程序中使用路由更改页面标题？

How to change page title with routing in Angular application?

angular

angular5