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<!doctype html> | |
<html ng-app="Demo" ng-controller="AppController"> | |
<head> | |
<meta charset="utf-8" /> | |
<title>Creating A Custom "Show" Directive In AngularJS</title> | |
<style type="text/css"> | |
ul { | |
height: 100px ; | |
list-style-type: none ; | |
margin: 0px 0px 0px 0px ; | |
padding: 0px 0px 0px 0px ; | |
} | |
li { | |
border: 1px solid #333333 ; | |
float: left ; | |
height: 100px ; | |
line-height: 100px ; | |
margin-right: 10px ; | |
overflow: hidden ; | |
text-align: center ; | |
width: 200px ; | |
} | |
</style> | |
</head> | |
<body> | |
<h1> | |
Creating A Custom "Show" Directive In AngularJS | |
</h1> | |
<p> | |
<a ng-click="toggle()">Toggle Elements</a> | |
</p> | |
<ul> | |
<li bn-slide-show="isVisible" slide-show-duration="2000"> | |
Using bnSlideShow | |
</li> | |
<li ng-show="isVisible"> | |
Using ngShow | |
</li> | |
</ul> | |
<!-- | |
Load jQuery andAngularJS from the CDN. In order for | |
AngularJS to use jQuery instead of its own jQLite, we | |
have to make sure jQuery is loaded first. | |
--> | |
<script | |
type="text/javascript" | |
src="//code.jquery.com/jquery-1.8.3.min.js"> | |
</script> | |
<script | |
type="text/javascript" | |
src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.2/angular.min.js"> | |
</script> | |
<script type="text/javascript"> | |
// Create an application module for our demo. | |
var Demo = angular.module( "Demo", [] ); | |
// -------------------------------------------------- // | |
// -------------------------------------------------- // | |
// Define our root-level controller for the application. | |
Demo.controller( | |
"AppController", | |
function( $scope, $route, $routeParams ){ | |
// I toggle the value of isVisible. | |
$scope.toggle = function() { | |
$scope.isVisible = ! $scope.isVisible; | |
}; | |
// Default the blocks to be visible. | |
$scope.isVisible = true; | |
} | |
); | |
// -------------------------------------------------- // | |
// -------------------------------------------------- // | |
// I hide and show elements based on the given model value. | |
// However, rather than using "display" style, I use jQuery's | |
// slideDown() / slideUp(). | |
Demo.directive( | |
"bnSlideShow", | |
function() { | |
// I allow an instance of the directive to be hooked | |
// into the user-interaction model outside of the | |
// AngularJS context. | |
function link( $scope, element, attributes ) { | |
// I am the TRUTHY expression to watch. | |
var expression = attributes.bnSlideShow; | |
// I am the optional slide duration. | |
var duration = ( parseInt(attributes.slideShowDuration) || "fast" ); | |
// I check to see the default display of the | |
// element based on the link-time value of the | |
// model we are watching. | |
if ( ! $scope.$eval( expression ) ) { | |
element.hide(); | |
} | |
// I watch the expression in $scope context to | |
// see when it changes - and adjust the visibility | |
// of the element accordingly. | |
$scope.$watch( | |
expression, | |
function( newValue, oldValue ) { | |
// Ignore first-run values since we've | |
// already defaulted the element state. | |
if ( newValue === oldValue ) { | |
return; | |
} | |
// Show element. | |
if ( newValue ) { | |
element | |
.stop( true, true ) | |
.slideDown( duration ) | |
; | |
// Hide element. | |
} else { | |
element | |
.stop( true, true ) | |
.slideUp( duration ) | |
; | |
} | |
} | |
); | |
} | |
// Return the directive configuration. | |
return({ | |
link: link, | |
restrict: "A" | |
}); | |
} | |
); | |
</script> | |
</body> | |
</html> |
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