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Javascript NgFor不工作,角度2_Javascript_Angular_Angular2 Template - Fatal编程技术网

Javascript NgFor不工作,角度2

Javascript NgFor不工作,角度2,javascript,angular,angular2-template,Javascript,Angular,Angular2 Template,它在alpha 42上运行良好,但在beta0上ngFor没有渲染任何内容。 组件代码: import {Component} from 'angular2/core'; import {CORE_DIRECTIVES} from 'angular2/common'; import {ROUTER_DIRECTIVES} from 'angular2/router'; @Component({ selector: 'catalog', templateU

它在alpha 42上运行良好,但在beta0上ngFor没有渲染任何内容。 组件代码:

import {Component} from 'angular2/core';
import {CORE_DIRECTIVES} from 'angular2/common';
import {ROUTER_DIRECTIVES} from 'angular2/router';

    @Component({
        selector: 'catalog',
        templateUrl: '/src/app/templates/catalog.html',
        directives: [CORE_DIRECTIVES, ROUTER_DIRECTIVES]
    })
    export class CatalogComponent { 
        public products: Object[] = [
            {
                "id": 42,
                "title": "19848",
                "description": "George Orwell's novel of a totalitarian future society in which a man whose daily work is rewriting history tries to rebel by falling in love.",
                "image": "http://u.livelib.ru/reader/jennlawer/o/q2vh8epd/o-o.jpeg"
            }
        ];
        constructor() { }
    }
catalog.html模板代码:

<h1>test</h1>
<div class="row">
  <div class="col-sm-3" *ngFor="#product of products">
    <div class="card">
      <img class="card-img-top img-responsive" [src]="product.image" alt="Card image cap">
      <div class="card-block">
        <h4 class="card-title">{{product.title}}</h4>
        <p class="card-text">{{product.description}}</p>
        <a [routerLink]="['/Product', {id: product.id}]" class="btn btn-primary">Button</a>
      </div>
    </div>
  </div>
</div>
<router-outlet></router-outlet>
测试
{{product.title}}

{{product.description}

按钮
根应用程序组件

import {Component, provide} from 'angular2/core';
import {bootstrap} from 'angular2/platform/browser';
import {RouteConfig, ROUTER_DIRECTIVES, HashLocationStrategy, LocationStrategy, ROUTER_PROVIDERS} from 'angular2/router';
import {CatalogComponent} from './components/catalog';
import {ProductComponent} from './components/product';
@Component({
    selector: 'app',
    template: '<h1>eShop</h1><router-outlet></router-outlet>',
    directives: [ROUTER_DIRECTIVES]
})
@RouteConfig([
  { path: '/', as: 'Catalog', component: CatalogComponent },
  {path: '/product/:id', as: 'Product', component: ProductComponent},
])
class AppComponent { }
bootstrap(AppComponent, [
    ROUTER_PROVIDERS,
    provide(LocationStrategy, {useClass: HashLocationStrategy})
]);
从'angular2/core'导入{组件,提供};
从'angular2/platform/browser'导入{bootstrap};
从“angular2/ROUTER”导入{RouteConfig、ROUTER_指令、HashLocationStrategy、LocationStrategy、ROUTER_PROVIDERS};
从“./components/catalog”导入{CatalogComponent};
从“./components/product”导入{ProductComponent};
@组成部分({
选择器:“应用程序”,
模板:“eShop”,
指令:[路由器指令]
})
@线路图([
{path:'/',as:'Catalog',component:catalogponent},
{path:'/product/:id',as:'product',component:ProductComponent},
])
类AppComponent{}
引导程序(AppComponent[
路由器供应商,
提供(LocationStrategy,{useClass:HashLocationStrategy})
]);
这个模板包括正确的,因为我可以在页面上看到h1测试,但我看不到ngFor的结果,因为您的示例运行良好(请参阅)

也许你的路由器有问题。确保已将
ROUTER\u PROVIDERS
添加到
bootstrap
函数并初始化:

从'angular2/platform/browser'导入{bootstrap};
从'angular2/core'导入{provide};
从“./app”导入{CatalogComponent};
从“angular2/ROUTER”导入{ROUTER_提供者、LocationStrategy、HashLocationStrategy};
引导(目录)组件[
路由器供应商,
提供(LocationStrategy,{useClass:HashLocationStrategy})
]);

目录实际上不是我的根组件,请参阅更新问题,根组件中是否存在问题?@cheeseq您能创建一个复制错误的plunk吗?你可以用我的叉子做这个。哎呀,当我用叉子叉你的叉子时,我注意到angular2 polyfills没有包含在我的index.html中。问题解决了,多亏了您的帮助:)