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Added a .data(obj) example #271

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Added a .data(obj) example #271

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Added .data(obj) example
Mottie Mar 26, 2013
c9de126
update to match style guide
Mottie Mar 27, 2013
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9 changes: 5 additions & 4 deletions entries/data.xml
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Expand Up @@ -23,11 +23,12 @@
<p>The <code>.data()</code> method allows us to attach data of any type to DOM elements in a way that is safe from circular references and therefore from memory leaks.</p> <p>The <code>.data()</code> method allows us to attach data of any type to DOM elements in a way that is safe from circular references and therefore from memory leaks.</p>
<p> We can set several distinct values for a single element and retrieve them later:</p> <p> We can set several distinct values for a single element and retrieve them later:</p>
<pre><code> <pre><code>
$('body').data('foo', 52); $("body").data("foo", 52);
$('body').data('bar', { myType: 'test', count: 40 }); $("body").data("bar", { myType: "test", count: 40 });
$("body").data({ baz: [ 1, 2, 3 ] });


$('body').data('foo'); // 52 $("body").data("foo"); // 52
$('body').data(); // {foo: 52, bar: { myType: 'test', count: 40 }} $("body").data(); // { foo: 52, bar: { myType: "test", count: 40 }, baz: [ 1, 2, 3 ] }
</code></pre> </code></pre>
<p>In jQuery 1.4.3 setting an element's data object with <code>.data(obj)</code> extends the data previously stored with that element. jQuery itself uses the <code>.data()</code> method to save information under the names 'events' and 'handle', and also reserves any data name starting with an underscore ('_') for internal use.</p> <p>In jQuery 1.4.3 setting an element's data object with <code>.data(obj)</code> extends the data previously stored with that element. jQuery itself uses the <code>.data()</code> method to save information under the names 'events' and 'handle', and also reserves any data name starting with an underscore ('_') for internal use.</p>
<p>Prior to jQuery 1.4.3 (starting in jQuery 1.4) the .data() method completely replaced all data, instead of just extending the data object. If you are using third-party plugins it may not be advisable to completely replace the element's data object, since plugins may have also set data.</p> <p>Prior to jQuery 1.4.3 (starting in jQuery 1.4) the .data() method completely replaced all data, instead of just extending the data object. If you are using third-party plugins it may not be advisable to completely replace the element's data object, since plugins may have also set data.</p>
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