How to use ngif in Angular
The ngIf
directive in Angular allows you to conditionally include or exclude an element from the DOM based on a boolean expression. Here's an example of how you can use ngIf
in a template:
<div *ngIf="showElement">
This element will only be displayed if the "showElement" variable is truthy.
</div>
You can also use ngIf
with an else
clause to specify a template to display if the boolean expression is false:
<div *ngIf="showElement; else otherTemplate">
This element will only be displayed if the "showElement" variable is truthy.
</div>
<ng-template #otherTemplate>
This element will be displayed if the "showElement" variable is falsy.
</ng-template>
In the component class, you can bind the value of the showElement
variable to a property in the component:
export class MyComponent {
showElement = true;
}
You can also use an expression in the ngIf
directive to evaluate a more complex boolean condition:
<div *ngIf="user.isAdmin || user.isModerator">
This element will be displayed if the "isAdmin" or "isModerator" properties of the "user" object are truthy.
</div>
For more information about the ngIf directive, you can refer to the Angular documentation.