mirror of
https://github.com/Hopiu/jquery-mobile.git
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132 lines
No EOL
5.7 KiB
HTML
132 lines
No EOL
5.7 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>.width()</h1>
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</div>
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<div data-role="content" data-theme="c" id="width1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.width()</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#Integer">Integer</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>Get the current computed width for the first element in the set of matched elements.</p>
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<ul class="signatures"><li class="signature" id="width"><h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.width()</h4></li></ul>
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<div class="longdesc">
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<p>The difference between <code>.css(width)</code> and <code>.width()</code> is that the latter returns a unit-less pixel value (for example, <code>400</code>) while the former returns a value with units intact (for example, <code>400px</code>). The <code>.width()</code> method is recommended when an element's width needs to be used in a mathematical calculation.</p>
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<p class="image"><img src="http://api.jquery.com/images/0042_04_04.png"></p>
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<p>This method is also able to find the width of the window and document.</p>
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<pre>$(window).width(); // returns width of browser viewport
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$(document).width(); // returns width of HTML document</pre>
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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">Show various widths. Note the values are from the iframe so might be smaller than you expected. The yellow highlight shows the iframe body.</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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body { background:yellow; }
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button { font-size:12px; margin:2px; }
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p { width:150px; border:1px red solid; }
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div { color:red; font-weight:bold; }
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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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<button id="getp">Get Paragraph Width</button>
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<button id="getd">Get Document Width</button>
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<button id="getw">Get Window Width</button>
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<div>&nbsp;</div>
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<p>
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Sample paragraph to test width
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</p>
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<script>
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function showWidth(ele, w) {
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$("div").text("The width for the " + ele +
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" is " + w + "px.");
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}
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$("#getp").click(function () {
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showWidth("paragraph", $("p").width());
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});
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$("#getd").click(function () {
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showWidth("document", $(document).width());
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});
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$("#getw").click(function () {
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showWidth("window", $(window).width());
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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 data-role="content" data-theme="c" id="width2">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.width( value )</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>Set the CSS width of each element in the set of matched elements.</p>
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<ul class="signatures">
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<li class="signature" id="width-value">
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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>.width( value )</h4>
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<p class="arguement"><strong>value</strong>An integer representing the number of pixels, or an integer along with an optional unit of measure appended (as a string).</p>
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</li>
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<li class="signature" id="width-functionindex, width">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.4.1/">1.4.1</a></span>.width( function(index, width) )</h4>
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<p class="arguement"><strong>function(index, width)</strong>A function returning the width to set. Receives the index position of the element in the set and the old width as arguments.</p>
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</li>
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</ul>
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<div class="longdesc">
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<p>When calling <code>.width('value')</code>, the value can be either a string (number and unit) or a number. If only a number is provided for the value, jQuery assumes a pixel unit. If a string is provided, however, any valid CSS measurement may be used for the width (such as <code>100px</code>, <code>50%</code>, or <code>auto</code>). Note that in modern browsers, the CSS width property does not include padding, border, or margin.</p>
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<p>If no explicit unit was specified (like 'em' or '%') then "px" is concatenated to the value.</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 set the width of each div on click to 30px plus a color change.</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 { width:70px; height:50px; float:left; margin:5px;
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background:red; cursor:pointer; }
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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>d</div>
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<div>d</div>
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<div>d</div>
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<div>d</div>
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<script>
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$("div").one('click', function () {
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$(this).width(30)
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.css({cursor:"auto", "background-color":"blue"});
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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> |