Angular2路由:加载两次 [英] Angular2 Routing : Loading twice
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问题描述
我正在使用Angular2进行路由，并且我的页面在初始加载时显示重复的内容.一旦我单击任何链接(Page1或Page2)，一切都将正常运行(不再有重复的内容).为什么我在初次加载时得到重复的内容，我需要让它仅显示一次?
I am using Angular2 with routing and my page is showing duplicate content on initial load. Once i click any Link(Page1 or Page2) everything works perfect(there is no more duplicate content). Why am i getting the duplicate content on initial load and what do i need to have it display once only
屏幕截图
index.html
index.html
<html>
<head>
<base href="/">
<title>Angular QuickStart</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<link rel="stylesheet" href="styles.css">
<!-- 1. Load libraries -->
<!-- Polyfill(s) for older browsers -->
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<!-- 2. Configure SystemJS -->
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function(err){ console.error(err); });
</script>
</head>
<!-- 3. Display the application -->
<body>
<my-app>
Loading...
</my-app>
</body>
</html>
App.module.ts
App.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { Page1Component } from './Page1/Page1.component';
import { Page2Component } from './Page2/Page2.component';
import { RouterModule } from '@angular/router';
@NgModule({
imports: [BrowserModule,
RouterModule.forRoot([
{ path: '', component: AppComponent },
{ path: 'Page1', component: Page1Component },
{ path: 'Page2', component: Page2Component }
])
],
declarations: [AppComponent, Page1Component, Page2Component],
bootstrap: [AppComponent]
})
export class AppModule { }
App.html(在初始请求期间加载)
App.html(this gets loaded during initial request)
<div class="container">
<div class="row">
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Brand</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active"><a [routerLink]="['/Page1']">Page1 <span class="sr-only">(current)</span></a></li>
<li><a [routerLink]="['/Page2']">Page2</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<form class="navbar-form navbar-left">
<div class="form-group">
<input type="text" class="form-control" placeholder="Search">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
</div>
<div class="row">
<div class="md-col-2"></div>
<div class="md-col-10"><router-outlet></router-outlet></div>
</div>
</div>
推荐答案
AppComponent不应该是路由的一部分.这就是根出口的所在.
The AppComponent shouldn't be part of the routing. It's what holds the root outlet.
{ path: '', component: AppComponent },
对于基本路径，您应该做的是确定哪个组件/路径应为默认视图，然后重定向到该路径.例如，如果page1应该是默认视图，则执行
What you should do instead for the base path, is decide what component/path should be the default view, then redirect to the path. For instance if the page1 should be the default view, then do
{ path: '', redirectTo: 'page1', pathMatch: 'full' },
这篇关于Angular2路由:加载两次的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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