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...
在单元格渲染器组件的代码中,定义一个布尔型变量ngIfCondition,并根据需要设置其值。可以在组件的输入属性中传入该变量,或者在组件中根据其他条件来计算。 代码语言:txt 复制 @Input() ngIfCondition: boolean; 这样,当ngIfCondition的值为true时,被ngIf包裹的内容将被渲染出来,否则将被忽略。
</ng-template> <!-- If and else conditions (storing condition value locally) --> <div *ngIf="condition as value; else elseBlock">{{value}}</div> <ng-template #elseBlock>...</ng-template> DEMO: https://stackblitz.com/edit/angular-feumnt?embed=1&file=src/app/app.component.html ...
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 ...
In this example, the paragraph element will be rendered if the expressionshowMessageevaluates to true. If it is false, the paragraph will not be displayed. Example 2: Rendering templates <div *ngIf="condition; then thenBlock; else elseBlock"></div> <ng-template #thenBlock> <p>This is re...
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 ...
For the problem I have I need to count ViewChildren and based on that do some actions directly in components. When adding *ngIf="checkCondition()" where checkCondition looks like this: checkCondition() { return this.children?.length } ExpressionChangedAfterItHasBeenCheckedError raises 🔬 Mini...
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<div *ngIf="condition; thenBlock else elseBlock"></div> <ng-template 如果表达式的计算结果为假,则 ng-if 指令会删除 HTML 元素。如果 if 语句的计算结果为 true,则将 Element 的副本添加到 DOM 中。ng-if 指令与 ng-hide 不同,ng-hide 隐藏元素的显示,ng-if 指令将元素从 DOM 中完全移除。
As you can see, we are using just two IF conditions ( *ngIf=isLoggedIn and *ngIf=!isLoggedIn ) here. Approach #2: Using IF / ELSE condition <div *ngIf="isLoggedIn; else loggedOut"> <!-- If NOT logged in use #loggedOut template--> <label class="mr-2">Hello, User!</lab...