创建可在各个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
<span *ngIf="item.createTime; else notAvailable">
{{item.createdTime | date:'medium'}}
</span>
并在页面末尾创建该模板
<ng-template #notAvailable>
<span class="text-muted f-12" [innerText]="'N/A'"></span>
</ng-template>
每个HTML页面上都重复同一行代码,因此寻找任何可帮助我创建一个通用组件/指令的解决方案,该组件/指令仅具有#notAvailable内容,并且可以在具有*ngIf
的每个页面上使用?
以前在angularJS中,我们可以创建一个单独的模板文件,并将使用它,但是在新的angular中,指令中不能附加HTML,因此如何执行此操作有些困惑?
有人,请指导我如何实现这一目标,以及需要在相应的组件和HTML中编写什么内容?
您可以创建一个组件,例如: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>
{{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>
In my angular 5 application, I need to do this on every HTML page
<span *ngIf="item.createTime; else notAvailable">
{{item.createdTime | date:'medium'}}
</span>
and on the end of page create that template
<ng-template #notAvailable>
<span class="text-muted f-12" [innerText]="'N/A'"></span>
</ng-template>
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
?
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?
someone, Please guide me how to achieve this and what need to write in the respective component and HTML?
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>
{{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>
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