mirror of
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91 lines
No EOL
4.5 KiB
HTML
91 lines
No EOL
4.5 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head><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>.scroll()</h1>
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</div>
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<div data-role="content" class=" ui-body ui-body-c" id="scroll1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.scroll( 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>Bind an event handler to the "scroll" JavaScript event, or trigger that event on an element.</p>
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<ul class="signatures">
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<li class="signature" id="scroll-handlereventObject">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.scroll( handler(eventObject) )</h4>
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<p class="arguement"><strong>handler(eventObject)</strong>A function to execute each time the event is triggered.</p>
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</li>
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<li class="signature" id="scroll"><h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.scroll()</h4></li>
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</ul>
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<div class="longdesc">
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<p>This method is a shortcut for <code>.bind('scroll', handler)</code> in the first variation, and <code>.trigger('scroll')</code> in the second.</p>
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<p>The <code>scroll</code> event is sent to an element when the user scrolls to a different place in the element. It applies to <code>window</code> objects, but also to scrollable frames and elements with the <code>overflow </code>CSS property set to <code>scroll</code> (or <code>auto</code> when the element's explicit height is less than the height of its contents).</p>
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<p>For example, consider the HTML:</p>
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<pre><div id="target" style="overflow: scroll; width: 200px; height: 100px;">
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Lorem ipsum dolor sit amet, consectetur adipisicing elit,
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sed do eiusmod tempor incididunt ut labore et dolore magna
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aliqua. Ut enim ad minim veniam, quis nostrud exercitation
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ullamco laboris nisi ut aliquip ex ea commodo consequat.
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Duis aute irure dolor in reprehenderit in voluptate velit
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esse cillum dolore eu fugiat nulla pariatur. Excepteur
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sint occaecat cupidatat non proident, sunt in culpa qui
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officia deserunt mollit anim id est laborum.
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</div>
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<div id="other">
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Trigger the handler
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</div>
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<div id="log"></div></pre>
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<p>The style definition is present to make the target element small enough to be scrollable:</p>
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<p class="image"><img src="http://api.jquery.com/images/0042_05_11.png" alt=""></p>
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<p>The <code>scroll</code> event handler can be bound to this element:</p>
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<pre>$('#target').scroll(function() {
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$('#log').append('<div>Handler for .scroll() called.</div>');
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});</pre>
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<p>Now when the user scrolls the text up or down, one or more messages are appended to <code><div id="log"></div></code>:</p>
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<p><span class="output">Handler for .scroll() called.</span></p>
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<p>We can trigger the event manually when another element is clicked:</p>
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<pre>$('#other').click(function() {
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$('#target').scroll();
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});</pre>
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<p>After this code executes, clicks on <span class="output">Trigger the handler</span> will also append the message.</p>
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<p>A <code>scroll</code> event is sent whenever the element's scroll position changes, regardless of the cause. A mouse click or drag on the scroll bar, dragging inside the element, pressing the arrow keys, or using the mouse's scroll wheel could cause this event.</p>
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</div>
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<h3>Example:</h3>
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<div id="entry-examples" class="entry-examples"><div id="example-0">
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<h4><span class="desc">To do something when your page is scrolled:</span></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 { color:blue; }
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p { color:green; }
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span { color:red; display:none; }
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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>Try scrolling the iframe.</div>
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<p>Paragraph - <span>Scroll happened!</span></p>
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<script>
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$("p").clone().appendTo(document.body);
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$("p").clone().appendTo(document.body);
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$("p").clone().appendTo(document.body);
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$(window).scroll(function () {
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$("span").css("display", "inline").fadeOut("slow");
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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></div>
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</div>
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</div>
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</div>
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</body></html> |