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3410f65e79
jQuery's elem.html('') is way slower than elem.empty(). As clearing
element contents happens quite often in certain scenarios, switching
to using .empty() provides a significant performance boost when using
Angular with jQuery.
Closes #4457
76 lines
2.5 KiB
JavaScript
76 lines
2.5 KiB
JavaScript
'use strict';
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/**
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* @ngdoc directive
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* @name ng.directive:ngTransclude
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* @restrict AC
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*
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* @description
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* Directive that marks the insertion point for the transcluded DOM of the nearest parent directive that uses transclusion.
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*
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* Any existing content of the element that this directive is placed on will be removed before the transcluded content is inserted.
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*
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* @element ANY
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*
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* @example
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<doc:example module="transclude">
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<doc:source>
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<script>
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function Ctrl($scope) {
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$scope.title = 'Lorem Ipsum';
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$scope.text = 'Neque porro quisquam est qui dolorem ipsum quia dolor...';
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}
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angular.module('transclude', [])
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.directive('pane', function(){
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return {
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restrict: 'E',
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transclude: true,
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scope: { title:'@' },
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template: '<div style="border: 1px solid black;">' +
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'<div style="background-color: gray">{{title}}</div>' +
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'<div ng-transclude></div>' +
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'</div>'
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};
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});
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</script>
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<div ng-controller="Ctrl">
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<input ng-model="title"><br>
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<textarea ng-model="text"></textarea> <br/>
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<pane title="{{title}}">{{text}}</pane>
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</div>
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</doc:source>
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<doc:scenario>
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it('should have transcluded', function() {
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input('title').enter('TITLE');
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input('text').enter('TEXT');
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expect(binding('title')).toEqual('TITLE');
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expect(binding('text')).toEqual('TEXT');
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});
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</doc:scenario>
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</doc:example>
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*
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*/
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var ngTranscludeDirective = ngDirective({
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controller: ['$element', '$transclude', function($element, $transclude) {
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if (!$transclude) {
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throw minErr('ngTransclude')('orphan',
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'Illegal use of ngTransclude directive in the template! ' +
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'No parent directive that requires a transclusion found. ' +
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'Element: {0}',
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startingTag($element));
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}
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// remember the transclusion fn but call it during linking so that we don't process transclusion before directives on
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// the parent element even when the transclusion replaces the current element. (we can't use priority here because
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// that applies only to compile fns and not controllers
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this.$transclude = $transclude;
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}],
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link: function($scope, $element, $attrs, controller) {
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controller.$transclude(function(clone) {
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$element.empty();
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$element.append(clone);
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});
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}
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});
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