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'use strict';
/**
* @ngdoc directive
* @name ng.directive:ngInit
* @restrict AC
*
* @description
* The `ngInit` directive allows you to evaluate an expression in the
* current scope.
*
* <div class="alert alert-error">
* The only appropriate use of `ngInit` is for aliasing special properties of
* {@link api/ng.directive:ngRepeat `ngRepeat`}, as seen in the demo below. Besides this case, you
* should use {@link guide/controller controllers} rather than `ngInit`
* to initialize values on a scope.
* </div>
* <div class="alert alert-warning">
* **Note**: If you have assignment in `ngInit` along with {@link api/ng.$filter `$filter`}, make
* sure you have parenthesis for correct precedence:
* <pre class="prettyprint">
* <div ng-init="test1 = (data | orderBy:'name')"></div>
* </pre>
* </div>
*
* @priority 450
*
* @element ANY
* @param {expression} ngInit {@link guide/expression Expression} to eval.
*
* @example
<doc:example>
<doc:source>
<script>
function Ctrl($scope) {
$scope.list = [['a', 'b'], ['c', 'd']];
}
</script>
<div ng-controller="Ctrl">
<div ng-repeat="innerList in list" ng-init="outerIndex = $index">
<div ng-repeat="value in innerList" ng-init="innerIndex = $index">
<span class="example-init">list[ {{outerIndex}} ][ {{innerIndex}} ] = {{value}};</span>
</div>
</div>
</div>
</doc:source>
<doc:protractor>
it('should alias index positions', function() {
var elements = element.all(by.css('.example-init'));
expect(elements.get(0).getText()).toBe('list[ 0 ][ 0 ] = a;');
expect(elements.get(1).getText()).toBe('list[ 0 ][ 1 ] = b;');
expect(elements.get(2).getText()).toBe('list[ 1 ][ 0 ] = c;');
expect(elements.get(3).getText()).toBe('list[ 1 ][ 1 ] = d;');
});
</doc:protractor>
</doc:example>
*/
var ngInitDirective = ngDirective({
priority: 450,
compile: function() {
return {
pre: function(scope, element, attrs) {
scope.$eval(attrs.ngInit);
}
};
}
});
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