## Selectize API – Events
In the [usage documentation](usage.md), a few callbacks are listed that
allow you to listen for certain events. Callbacks aren't always ideal though;
specifically when you wish to have multiple handlers.
Selectize instances have a basic event emitter interface that mimics jQuery, Backbone.js, et al:
```js
var handler = function() { /* ... */ };
selectize.on('event_name', handler);
selectize.off('event_name');
selectize.off('event_name', handler);
```
### List of Events
<table width="100%">
<tr>
<th valign="top" width="200px" align="left">Event</th>
<th valign="top" width="150px" align="left">Params</th>
<th valign="top" align="left">Description</th>
</tr>
<tr>
<td valign="top"><code>"initialize"</code></td>
<td valign="top"></td>
<td valign="top">Invoked once the control is completely initialized.</td>
</tr>
<tr>
<td valign="top"><code>"change"</code></td>
<td valign="top"><code>value</code></td>
<td valign="top">Invoked when the value of the control changes.</td>
</tr>
<tr>
<td valign="top"><code>"focus"</code></td>
<td valign="top"></td>
<td valign="top">Invoked when the control gains focus.</td>
</tr>
<tr>
<td valign="top"><code>"blur"</code></td>
<td valign="top"></td>
<td valign="top">Invoked when the control loses focus.</td>
</tr>
<tr>
<td valign="top"><code>"item_add"</code></td>
<td valign="top"><code>value</code>, <code>$item</code></td>
<td valign="top">Invoked when an item is selected.</td>
</tr>
<tr>
<td valign="top"><code>"item_remove"</code></td>
<td valign="top"><code>value</code>, <code>$item</code></td>
<td valign="top">Invoked when an item is deselected.</td>
</tr>
<tr>
<td valign="top"><code>"clear"</code></td>
<td valign="top"></td>
<td valign="top">Invoked when the control is manually cleared via the clear() method.</td>
</tr>
<tr>
<td valign="top"><code>"option_add"</code></td>
<td valign="top"><code>value</code>, <code>data</code></td>
<td valign="top">Invoked when a new option is added to the available options list.</td>
</tr>
<tr>
<td valign="top"><code>"option_remove"</code></td>
<td valign="top"><code>value</code></td>
<td valign="top">Invoked when an option is removed from the available options.</td>
</tr>
<tr>
<td valign="top"><code>"option_clear"</code></td>
<td valign="top"></td>
<td valign="top">Invoked when all options are removed from the control.</td>
</tr>
<tr>
<td valign="top"><code>"optgroup_add"</code></td>
<td valign="top"><code>id</code>, <code>data</code></td>
<td valign="top">Invoked when a new option is added to the available options list.</td>
</tr>
<tr>
<td valign="top"><code>"optgroup_remove"</code></td>
<td valign="top"><code>id</code></td>
<td valign="top">Invoked when an option group is removed.</td>
</tr>
<tr>
<td valign="top"><code>"optgroup_clear"</code></td>
<td valign="top"></td>
<td valign="top">Invoked when all option groups are removed.</td>
</tr>
<tr>
<td valign="top"><code>"dropdown_open"</code></td>
<td valign="top"><code>$dropdown</code></td>
<td valign="top">Invoked when the dropdown opens.</td>
</tr>
<tr>
<td valign="top"><code>"dropdown_close"</code></td>
<td valign="top"><code>$dropdown</code></td>
<td valign="top">Invoked when the dropdown closes.</td>
</tr>
<tr>
<td valign="top"><code>"type"</code></td>
<td valign="top"><code>str</code></td>
<td valign="top">Invoked when the user types while filtering options.</td>
</tr>
<tr>
<td valign="top"><code>"load"</code></td>
<td valign="top"><code>data</code></td>
<td valign="top">Invoked when new options have been loaded and added to the control (via the <code>load</code> option or <code>load</code> API method).</td>
</tr>
<tr>
<td valign="top"><code>"destroy"</code></td>
<td valign="top"></td>
<td valign="top">Invoked right before the control is destroyed.</td>
</tr>
</table>
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