stofl stofl - 4 months ago 23
Javascript Question

Model does not update within ng-if

I've got a strange behavior in an angular application and I don't know if that's a bug or a known limitation:



'use strict';

var ctrl = function ($scope) {
$scope.foo = false;
};

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app ng-controller="ctrl">
foo: {{foo}}
<div ng-if="foo" style="background-color: #f00;">
<p>foo</p>
</div>
<div ng-if="!foo">
<br/><button ng-click="foo = true;">Show foo</button>
</div>
<button ng-click="foo = true">Show foo</button>
</div>





http://jsfiddle.net/78R52/

I would expect that clicking one of the buttons would set
foo = true
, but clicking the first button (within the
ng-if="!foo"
) doesn't change the model.

Tested version is
1.2.1
.

Answer

ng-if has its own scope, so you need to use:

<br/><button ng-click="$parent.foo = true;">Show foo</button>

Updated fiddle: http://jsfiddle.net/78R52/1/

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