40 lines
1.8 KiB
HTML
40 lines
1.8 KiB
HTML
<section>
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<h2 id="selection-api-access">
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How to programmatically access a selection data?
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</h2>
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<p>
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There are few ways to programmatically access the selection data. Calling <code>select2('data')</code> will return the JavaScript array of an objects representing the current selection. Each object will have properties/values which was in the source data objects passed through <code>processResults</code> and <code>templateResult</code> functions (as in <a href="#data">Loading data from an array</a> and <a href="#ajax">Connecting to a remote data source</a>).
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</p>
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{% highlight js linenos %}
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$('select').select2('data');
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{% endhighlight %}
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<p>
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As Select2 uses the HTML <code><SELECT></code> element to store the selection result, the selection data are represented by <code><OPTION></code> elements and can be accessed in the plain jQuery/DOM manner. The resulting elements will have properties/values from the source data objects, stored by the means of jQuery <code>data()</code> method and accessible by key <code>'data'</code>:
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</p>
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{% highlight js linenos %}
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// Retrieve source data object's data of the first selected element
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$('select').find(':selected').data('data');
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{% endhighlight %}
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<p>
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Another technique is not to rely on jQuery's <code>data()</code> method but to extend the <code><OPTION></code> elements representing selection with the HTML data-* attributes containing arbitrary data from the source data objects:
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</p>
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{% highlight js linenos %}
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$('select').select2({
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// ...
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templateSelection: function (data, container) {
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$(data.element).attr('data-custom-attribute', data.customValue);
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return data.text;
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}
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});
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// Retrieve custom attribute value of the first selected element
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$('select').find(':selected').attr('data-custom-attribute')
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{% endhighlight %}
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</section> |