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<html lang="en"> |
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<head> |
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<meta charset="utf-8"> |
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<title>Example: Delegating Node Events</title> |
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<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=PT+Sans:400,700,400italic,700italic"> |
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<script src="../../build/yui/yui-min.js"></script> |
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</head> |
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<body> |
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<!-- |
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<a href="https://github.com/yui/yui3"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a> |
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--> |
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<div id="doc"> |
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<div id="hd"> |
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<h1><img src="http://yuilibrary.com/img/yui-logo.png"></h1> |
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</div> |
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<h1>Example: Delegating Node Events</h1> |
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<div class="yui3-g"> |
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<div class="yui3-u-3-4"> |
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<div id="main"> |
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<div class="content"><link href="../assets/node/node.css" rel="stylesheet" type="text/css"> |
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<div class="intro"> |
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<p>This example demonstrates using a single event listener on a list to delegate clicks on the list items.</p> |
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</div> |
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<div class="example"> |
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<style> |
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#demo li { |
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height: 3em; |
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} |
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</style> |
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<ul id="demo"> |
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<li><em>Click me if you don't mind...</em></li> |
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<li><em>Click me if you don't mind...</em></li> |
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<li><em>Click me if you don't mind...</em></li> |
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<li><em>Click me if you don't mind...</em></li> |
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</ul> |
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<script type="text/javascript"> |
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YUI().use('node', function(Y) { |
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var nodes = Y.all('#demo li'); |
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var onClick = function(e) { |
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e.currentTarget.addClass('highlight'); // e.currentTarget === #demo li |
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e.target.setHTML('Thanks for the click!'); // e.target === #demo li or #demo li em |
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e.container.setStyle('border', '5px solid #FFA100'); // e.container === #demo |
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nodes.filter(':not(.highlight)').setHTML('What about me?'); |
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}; |
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Y.one('#demo').delegate('click', onClick, 'li'); |
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}); |
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</script> |
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</div> |
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<h2>Setting up the HTML</h2> |
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<p>First we need some HTML to work with.</p> |
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<pre class="code prettyprint"><ul id="demo"> |
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<li>Click me if you don't mind...</li> |
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<li>Click me if you don't mind...</li> |
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<li>Click me if you don't mind...</li> |
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<li>Click me if you don't mind...</li> |
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</ul></pre> |
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<h2>Geting a NodeList Instance</h2> |
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<p>We will use the <code>all</code> method of our YUI instance to get a <code>NodeList</code> instance to work with.</p> |
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<pre class="code prettyprint">var nodes = Y.all('#demo li');</pre> |
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<h2>Delegating Node Events</h2> |
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<p>In this example, we will listen for a <code>click</code> event on the list and handle it at the item level and use information from the <code>event</code> object to update the nodes.</p> |
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<pre class="code prettyprint">var onClick = function(e) { |
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e.currentTarget.addClass('highlight'); // e.currentTarget === #demo li |
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e.target.setHTML('Thanks for the click!'); // e.target === #demo li or #demo li em |
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e.container.setStyle('border', '5px solid #FFA100'); // e.container === #demo |
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nodes.filter(':not(.highlight)').setHTML('What about me?'); |
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};</pre> |
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<p>Now we just assign the handler to the <code>UL</code> using the <code>delegate</code> method to handle clicks on each <code>LI</code>.</p> |
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<pre class="code prettyprint">Y.one('#demo').delegate('click', onClick, 'li');</pre> |
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<h2>Complete Example Source</h2> |
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<pre class="code prettyprint"><style> |
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#demo li { |
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height: 3em; |
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} |
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</style> |
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<ul id="demo"> |
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<li><em>Click me if you don't mind...</em></li> |
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<li><em>Click me if you don't mind...</em></li> |
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<li><em>Click me if you don't mind...</em></li> |
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<li><em>Click me if you don't mind...</em></li> |
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</ul> |
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<script type="text/javascript"> |
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YUI().use('node', function(Y) { |
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var nodes = Y.all('#demo li'); |
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var onClick = function(e) { |
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e.currentTarget.addClass('highlight'); // e.currentTarget === #demo li |
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e.target.setHTML('Thanks for the click!'); // e.target === #demo li or #demo li em |
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e.container.setStyle('border', '5px solid #FFA100'); // e.container === #demo |
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nodes.filter(':not(.highlight)').setHTML('What about me?'); |
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}; |
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Y.one('#demo').delegate('click', onClick, 'li'); |
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}); |
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</script></pre> |
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</div> |
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</div> |
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</div> |
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<div class="yui3-u-1-4"> |
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<div class="sidebar"> |
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<div class="sidebox"> |
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<div class="hd"> |
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<h2 class="no-toc">Examples</h2> |
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</div> |
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<div class="bd"> |
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<ul class="examples"> |
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<li data-description="Using selectors and property accessors with Node."> |
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<a href="properties.html">Set and Get Properties</a> |
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</li> |
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<li data-description="Using DOM methods with Node."> |
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<a href="dom-node.html">DOM Methods</a> |
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</li> |
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<li data-description="Building a simple store and shopping cart."> |
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<a href="store.html">DOM Methods - Store</a> |
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</li> |
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<li data-description="Listening for DOM events with Node instances."> |
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<a href="events.html">Handling DOM Events</a> |
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</li> |
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<li data-description="NodeList provides Node functionality for manipulating multiple nodes at once."> |
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<a href="nodelist.html">Using NodeList - Simple</a> |
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</li> |
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<li data-description="How to use multiple NodeList features to build a simple game."> |
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<a href="ducks.html">Using NodeList - Ducks Game</a> |
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</li> |
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<li data-description="Using a single event listener to handle events on multiple nodes."> |
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<a href="node-evt-delegation.html">Delegating Node Events</a> |
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</li> |
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<li data-description="This example demonstrates how to position an element in page coordinates."> |
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<a href="node-xy.html">Node Positioning</a> |
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</li> |
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<li data-description="This example demonstrates how to set styles and get style information."> |
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<a href="node-style.html">Node Styling</a> |
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</li> |
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<li data-description="This example demonstrates how to insert content into a Node."> |
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<a href="node-insert.html">Adding Node Content - Burger Builder</a> |
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</li> |
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<li data-description="This example demonstrates how to show and hide a Node."> |
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<a href="node-view.html">Showing and Hiding</a> |
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</li> |
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</ul> |
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</div> |
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</div> |
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<div class="sidebox"> |
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<div class="hd"> |
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<h2 class="no-toc">Examples That Use This Component</h2> |
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</div> |
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<div class="bd"> |
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<ul class="examples"> |
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<li data-description="Creating an accessible toolbar using the Focus Manager Node Plugin and Node's support for the WAI-ARIA Roles and States."> |
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<a href="../node-focusmanager/node-focusmanager-toolbar.html">Accessible Toolbar</a> |
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</li> |
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<li data-description="Creating an accessible menu button using the Focus Manager Node Plugin, Event's delegation support and mouseenter event, along with the Overlay widget and Node's support for the WAI-ARIA Roles and States."> |
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<a href="../node-focusmanager/node-focusmanager-button.html">Accessible Menu Button</a> |
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</li> |
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<li data-description="Use the Event Utility to attach simple DOM event handlers."> |
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<a href="../event/basic-example.html">Simple DOM Events</a> |
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</li> |
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<li data-description="Example Photo Browser application."> |
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<a href="../dd/photo-browser.html">Photo Browser</a> |
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</li> |
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<li data-description="Portal style example using Drag & Drop Event Bubbling and Animation."> |
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<a href="../dd/portal-drag.html">Portal Style Example</a> |
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</li> |
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<li data-description="Use IO to request XML data from a remote web service."> |
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<a href="../io/weather.html">Request XML data from Yahoo! Weather</a> |
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</li> |
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<li data-description="Use IO to make a cross-domain request to Yahoo! Pipes, returning data from disparate sources."> |
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<a href="../io/xdr.html">Request JSON using Yahoo! Pipes</a> |
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</li> |
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</ul> |
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</div> |
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</div> |
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</div> |
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</div> |
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</div> |
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</div> |
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<script src="../assets/vendor/prettify/prettify-min.js"></script> |
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<script>prettyPrint();</script> |
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<script> |
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YUI.Env.Tests = { |
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examples: [], |
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project: '../assets', |
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assets: '../assets/node', |
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name: 'node-evt-delegation', |
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title: 'Delegating Node Events', |
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newWindow: '', |
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auto: false |
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}; |
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YUI.Env.Tests.examples.push('properties'); |
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YUI.Env.Tests.examples.push('dom-node'); |
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YUI.Env.Tests.examples.push('store'); |
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YUI.Env.Tests.examples.push('events'); |
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YUI.Env.Tests.examples.push('nodelist'); |
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YUI.Env.Tests.examples.push('ducks'); |
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YUI.Env.Tests.examples.push('node-evt-delegation'); |
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YUI.Env.Tests.examples.push('node-xy'); |
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YUI.Env.Tests.examples.push('node-style'); |
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YUI.Env.Tests.examples.push('node-insert'); |
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YUI.Env.Tests.examples.push('node-view'); |
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YUI.Env.Tests.examples.push('node-focusmanager-toolbar'); |
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YUI.Env.Tests.examples.push('node-focusmanager-button'); |
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YUI.Env.Tests.examples.push('basic-example'); |
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YUI.Env.Tests.examples.push('photo-browser'); |
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YUI.Env.Tests.examples.push('portal-drag'); |
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YUI.Env.Tests.examples.push('weather'); |
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YUI.Env.Tests.examples.push('xdr'); |
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</script> |
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<script src="../assets/yui/test-runner.js"></script> |
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</body> |
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</html> |