69 lines
2.3 KiB
HTML
69 lines
2.3 KiB
HTML
<section>
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<h2 id="data-adapters-select-tag">
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Can Select2 be used with a <code><select></code> tag?
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</h2>
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<p>
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Select2 was designed to be a replacement for the standard <code><select></code> boxes that are displayed by the browser, so by default it supports all options and operations that are available in a standard select box, but with added flexibility. There is no special configuration required to make Select2 work with a <code><select></code> tag.
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</p>
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<h3>
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Does Select2 support nesting options?
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</h3>
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<p>
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A standard <code><select></code> box can display nested options by wrapping them with in an <code><optgroup></code> tag.
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</p>
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{% highlight html linenos %}
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<select>
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<optgroup label="Group Name">
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<option>Nested option</option>
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</optgroup>
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</select>
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{% endhighlight %}
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<h3>
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How many levels of nesting can there be?
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</h3>
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<p>
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Only a single level of nesting is allowed per the HTML specification. If you nest an <code><optgroup></code> within another <code><optgroup></code>, Select2 will not be able to detect the extra level of nesting and errors may be triggered as a result.
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</p>
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<h3>
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Can <code><optgroup></code> tags be made selectable?
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</h3>
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<p>
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No. This is a limitation of the HTML specification and is not a limitation that Select2 can overcome. You can emulate grouping by using an <code><option></code> instead of an <code><optgroup></code> and <a href="http://stackoverflow.com/q/30820215/359284#30948247">changing the style by using CSS</a>, but this is not recommended as it is not fully accessible.
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</p>
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<h3>
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How are <code><option></code> and <code><optgroup></code> tags serialized into data objects?
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</h3>
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<p>
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Select2 will convert the <code><option></code> tag into a data object based on the following rules.
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</p>
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{% highlight js linenos %}
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{
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"id": "value attribute" || "option text",
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"text": "label attribute" || "option text",
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"element": HTMLOptionElement
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}
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{% endhighlight %}
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<p>
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And <code><optgroup></code> tags will be converted into data objects using the following rules
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</p>
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{% highlight js linenos %}
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{
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"text": "label attribute",
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"children": [ option data object, ... ],
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"elment": HTMLOptGroupElement
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}
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{% endhighlight %}
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</section> |