Stable Directive
Class Overview
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):
<div *ngIf="errorCount > 0" class="error"> <!-- Error message displayed when the errorCount property on the current context is greater than 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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