p.
  <span class="location-badge">exported from <a href="/angular2/directives">angular2/directives</a></span>
  defined in <a href="https://github.com/angular/angular/tree/master/modules/angular2/src/directives/if.js#L33">angular2/src/directives/if.js (line 33)</a>

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  Removes or recreates a portion of the DOM tree based on an {expression}.
  
  If the expression assigned to `if` 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:
  
  ```
  <div *if="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 *if="condition">...</div>`
  - `<div template="if condition">...</div>`
  - `<template [if]="condition"><div>...</div></template>`
  
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  h2 Members
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    h3 constructor

    
    pre.prettyprint
      code.
        (viewContainer: ViewContainer)

    

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  .l-sub-section
    h3 condition

    
    pre.prettyprint
      code.
        (newCondition)

    

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    h3 prevCondition

    

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  .l-sub-section
    h3 viewContainer

    

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