在使用ngIf时,我们可以将其应用于任何HTML元素,例如div、span、button等。当条件为真时,元素将被渲染并显示在页面上,否则将被隐藏。 下面是一个示例,演示如何在div中使用ngIf指令: 代码语言:txt 复制 <div *ngIf="condition"> 这是一个根据条件动态显示的div。 </div> 在上面的示例中,*号是ngIf指令...
我正在查看*ngIf的源代码: @Input() set ngIf(condition: any) { if (condition && !this._hasView) { this._hasView = true; this._viewContainer.createEmbeddedView(this._template); } else if (!condition && this._hasView) { this._hasView = false; this._viewContainer. 浏览8提问于2017-...
ngIf is not working in child component. There are two sibling components (Release and Assets) and both have a shared component (version-actions), and both the sibling components are essentially inside two different mat-tab tags in the parent component. If the tab selected is Release then a ...
<ng-container *ngIf="condition"> <div>如果条件为真,将会显示这些元素</div> </ng-container> 在上面的示例中,我们使用ng-container包含一个div元素。当条件为真时,ng-container中的元素将呈现。如果条件为假,则不会在 DOM 中添加ng-container或它的子元素。
As was mention by others, the fastest and quickest solution is to use [style.display]="condition ? '' : 'none'" or [hidden] instead of *ngIf. Taking this approach the component will be created but not visible, therefore you have access to it. This might not be the most efficient wa...
Based on that flag, a certain HTML element is added or removed from the DOM: example.component.ts <p>Show this all the time</p> <p *ngIf="show">Show this only if "show" is true</p> Also, this condition does also apply to all child elements of the element that has the ngIf ...
In this example, we are using thengIfdirective with a template syntax. Theconditionis evaluated, and based on its result, either thethenBlockor theelseBlocktemplate will be rendered. This allows us to conditionally render complex templates based on the evaluation of an expression. ...
condition3">...</some-element></ng-template> Here, thesome-elementis the element that you want to show or hide based on the conditions. The*ngIfdirective is used to evaluate the first condition (condition1). If it is true, then thesome-elementis rendered. Otherwise, theelsepart is ...
https://stackblitz.com/edit/angular-material2-issue-3xb5aa?file=app/app.component.html What is the use-case or motivation for changing an existing behavior? We need to display a table with pagination only if certain condition is met Which versions of Angular, Material, OS, TypeScript, brows...
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