mirror of
https://github.com/Hopiu/jquery-mobile.git
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90 lines
No EOL
3.4 KiB
HTML
90 lines
No EOL
3.4 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, minimum-scale=1, maximum-scale=1"><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
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<div data-role="page">
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<div data-role="header">
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<h1>.one()</h1>
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</div>
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<div data-role="content" data-theme="c" id="one1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.one( eventType, [ eventData ], handler(eventObject) )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>
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</h2>
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<div class=" entry-details">
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<p class="desc"><strong>Description: </strong>Attach a handler to an event for the elements. The handler is executed at most once.</p>
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<ul class="signatures"><li class="signature" id="one-eventType-eventData-handlereventObject">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.1/">1.1</a></span>.one( eventType, [ eventData ], handler(eventObject) )</h4>
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<p class="arguement"><strong>eventType</strong>A string containing one or more JavaScript event types, such as "click" or "submit," or custom event names.</p>
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<p class="arguement"><strong>eventData</strong>A map of data that will be passed to the event handler.</p>
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<p class="arguement"><strong>handler(eventObject)</strong>A function to execute at the time the event is triggered.</p>
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</li></ul>
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<div class="longdesc">
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<p>This method is identical to <code>.bind()</code>, except that the handler is unbound after its first invocation. For example:</p>
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<pre>$('#foo').one('click', function() {
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alert('This will be displayed only once.');
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});
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</pre>
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<p>After the code is executed, a click on the element with ID <code>foo</code> will display the alert. Subsequent clicks will do nothing. This code is equivalent to:</p>
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<pre>$('#foo').bind('click', function(event) {
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alert('This will be displayed only once.');
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$(this).unbind(event);
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});
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</pre>
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<p>In other words, explicitly calling <code>.unbind()</code> from within a regularly-bound handler has exactly the same effect.</p>
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</div>
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<h3>Examples:</h3>
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<div id="entry-examples" class="entry-examples">
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<div id="example-0">
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<h4>Example: <span class="desc">Tie a one-time click to each div.</span>
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</h4>
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<pre><code class="example demo-code"><!DOCTYPE html>
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<html>
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<head>
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<style>
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div { width:60px; height:60px; margin:5px; float:left;
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background:green; border:10px outset;
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cursor:pointer; }
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p { color:red; margin:0; clear:left; }
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</style>
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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<div></div>
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<div></div>
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<div></div>
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<div></div>
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<div></div>
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<p>Click a green square...</p>
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<script>
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var n = 0;
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$("div").one("click", function(){
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var index = $("div").index(this);
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$(this).css({ borderStyle:"inset",
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cursor:"auto" });
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$("p").text("Div at index #" + index + " clicked." +
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" That's " + ++n + " total clicks.");
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});
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</script>
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</body>
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</html></code></pre>
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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div>
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<div id="example-1">
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<h4>Example: <span class="desc">To display the text of all paragraphs in an alert box the first time each of them is clicked:</span>
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</h4>
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<pre><code class="example">$("p").one("click", function(){
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alert( $(this).text() );
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});</code></pre>
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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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</body></html> |