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---
layout: page
title: Treeview Plugin
---
The Treeview plugin converts a nested list into a tree view where sub menus can be expanded.
##### Usage
This plugin can be activated as a jQuery plugin or using the data api.
###### Data API
{: .text-bold }
Add `data-widget="treeview"` to any `ul` or `ol` element to activate the plugin.
```html
<ul data-widget="treeview">
<li><a href="#">One Level</a></li>
<li class="nav-item">
<a class="nav-link" href="#">Multilevel</a>
<ul class="nav-treeview">
<li><a href="#">Level 2</a></li>
</ul>
</li>
</ul>
```
###### jQuery
{: .text-bold }
```js
$('ul').Treeview(options)
```
##### Options
{: .mt-4}
|---
| Name | Type | Default | Description
|-|-|-|-
|animationSpeed | Number | 300 | Speed of slide down/up animation in milliseconds.
|accordion | Boolean | TRUE | Whether to collapse the open menu when expanding another.
|trigger | String | `[data-widget="treeview"] .nav-link` | Selector of the element that should respond to the click and result in expanding or collapsing it sibling sub menu.
|expandSidebar | Boolean | FALSE | Whether to expand sidebar on open menu.
|sidebarButtonSelector | String | `[data-widget="pushmenu"]` | Selector of the sidebar button.
{: .table .table-bordered .bg-light}
> ##### Tip!
> You can use any option via the data-attributes like this.
> ```html
> <ul data-widget="treeview" data-accordion="false">...</ul>
> ```
{: .quote-info}
> ##### IMPORTANT!
> If you want to use a multiple treeview's beside the main-sidebar treeview,
> then you need to add to all treeview's a ID-tag.
> ```html
> <ul data-widget="treeview" id="someIdNameOrSo" data-accordion="false">...</ul>
> ```
{: .quote-danger}
##### Events
{: .mt-4}
|---
| Event Type | Description
|-|-
|expanded.lte.treeview | Triggered after a sub menu expands.
|collapsed.lte.treeview | Triggered after a sub menu collapses.
|load.lte.treeview | Triggered after the plugin initialized via data api.
{: .table .table-bordered .bg-light}
Example: `$('ul').on('expanded.lte.treeview', handleExpandedEvent)`