创建可在各种页面上使用的可重用模板 [英] Create a reusable template which can be used on various pages

问题描述

在我的 angular 5 应用程序中，我需要在每个 HTML 页面上执行此操作

In my angular 5 application, I need to do this on every HTML page

<span *ngIf="item.createTime; else notAvailable">
   &nbsp;{{item.createdTime | date:'medium'}}
</span>

并在页面末尾创建该模板

and on the end of page create that template

<ng-template #notAvailable>
    <span class="text-muted f-12" [innerText]="'N/A'"></span>
</ng-template>

在每个 HTML 页面上都重复相同的代码行，因此寻找任何解决方案来帮助我创建一个只有 #notAvailable 内容的通用组件/指令，并且可以在每个带有 *ngIf 的页面上使用?

there is repeating the same line of code on every HTML page, so looking for any solution which helps me to create one common component/directive which has only #notAvailable content and can be used on every page with *ngIf?

在早期的angularJS中，我们可以创建一个单独的模板文件并将其使用，但是在新的angular中，指令中没有可以附加HTML，所以有点困惑如何做到这一点?

earlier in angularJS, we can create a separate template file and will be used but in new angular, there is no HTML can be attached in the directive, so a bit confused how to do this?

有人，请指导我如何实现这一点以及需要在各自的组件和HTML中编写什么?

someone, Please guide me how to achieve this and what need to write in the respective component and HTML?

推荐答案

您可以创建一个组件，例如:CreatedTimeComponentcreated-time.component.ts

You can create a component ex.: CreatedTimeComponent created-time.component.ts

@Component({
  selector: 'app-created-time',
  templateUrl: './created-time.component.html',
  styleUrls: ['./created-time.component.scss']
})
export class CreatedTimeComponent {
  Input()
  createdTime: Date;
}

created-time.component.html

<ng-container *ngIf="createdTime; else notAvailable">
  <span>
     &nbsp;{{createdTime | date:'medium'}}
  </span>
</ng-container>
<ng-template #notAvailable>
  <span class="text-muted f-12">N/A</span>
</ng-template>

some-other.component.html

<h2>My some other component<h2>
<app-created-time [createdTime]="item.createdTime"></app-created-time>

这篇关于创建可在各种页面上使用的可重用模板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！