Stable Directive
Class Overview
1 2 3 4 5 6 | class NgIf { constructor(_viewContainer: ViewContainerRef, _template: TemplateRef<Object>) ngIf } |
Selectors
[ngIf]
Class Description
Removes or recreates a portion of the DOM tree based on an {expression}.
If the expression assigned to ngIf evaluates to a false value then the element is removed from the DOM, otherwise a clone of the element is reinserted into the DOM.
Example (live demo):
1 2 3 4 5 | <div *ngIf="errorCount > 0" class="error"> <!-- Error message displayed when the errorCount property on the current context is greaterthan 0. --> {{errorCount}} errors detected</div> |
Syntax
<div *ngIf="condition">...</div><div template="ngIf condition">...</div><template [ngIf]="condition"><div>...</div></template>
Constructor
constructor(_viewContainer: ViewContainerRef, _template: TemplateRef<Object>)
Class Details
ngIf
exported from @angular/common/index, defined in @angular/common/src/directives/ng_if.ts
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