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Overview

The Dropdown Tree control is a text-box control that allows users to select a single value or multiple values from hierarchical data in a tree-like structure. It has several out-of-the-box features, such as data binding, checkboxes, templates, UI customization, accessibility, and preselected values.

HTML5 Dropdown Tree.


JavaScript Dropdown Tree with data binding.

Data binding

Bind data to the Dropdown Tree control from different data sources. Data can be local or in any remote service and fetched using different kinds of adapters like OData, OData V4, URL, JSON, and web API.


Render modes

The Dropdown Tree control has different render modes to visualize selected items.

Box mode

The selected items are displayed as a chip (box) in the Dropdown Tree input box.

JavaScript/HTML5 Dropdown Tree with chip mode.

Delimiter mode

The selected items are displayed with the delimiter character in the Dropdown Tree input box.

JavaScript/HTML5 Dropdown Tree with delimiter mode.

Default mode

The default mode is a combination of both the box and delimiter modes. When the control is in focus, selected items will be displayed as chips similar to the box mode. Otherwise, they will be displayed with a delimiter character as in the delimiter mode.

JavaScript/HTML5 Dropdown Tree with default rendering mode.

Template mode

The selected items are displayed with the given custom template value instead of the selected item text in the Dropdown Tree input box.

JavaScript/HTML5 Dropdown Tree with custom rendering mode.


JavaScript Dropdown Tree with checkboxes.

Checkboxes

The JavaScript Dropdown Tree control provides built-in support for checkboxes, allowing users to select more than one item. Enabling the checkboxes and autocheck functionality makes the parent and child items dependent on each other. This control also provides a Select All option in the pop-up.


Multiple selection

The Dropdown Tree control allows users to select more than one item in the pop-up using the multiselection functionality.

HTML5 Dropdown Tree with multiple selection.


UI customization with templates

Use templates to change the appearance of the selection pop-up for tree items, plus the header and footer of the pop-up tree.

Header template

Design your own header for the pop-up tree using the header template.

JavaScript/HTML5 Dropdown Tree with header template.

Item template

Define the custom appearance of each tree item using the item template.

JavaScript/HTML5 Dropdown Tree with item template.

Design your own custom footer for the pop-up tree using the footer template.

JavaScript/HTML5 Dropdown Tree with footer template.


Built-in and customizable themes

Several built-in, Sass-based themes are available: Fluent, Tailwind CSS, Bootstrap 5, Bootstrap, Material, and high contrast. Users can customize these themes by either overriding the existing Sass styles or creating custom themes using the Theme Studio application.

Theme illustration for JavaScript/HTML5 Dropdown tree.


Web accessibility

  • Fully supports WAI-ARIA accessibility to make the Dropdown Tree accessible to screen readers and assistive devices.
  • Follows WAI-ARIA best practices for implementing keyboard interaction.
  • Uses WCAG 2.0-based design for UI visual elements such as foreground color, background color, line spacing, text, and images.
  • Supports right-to-left (RTL) direction for users working with RTL languages like Hebrew and Arabic.

Developer-friendly APIs

Developers can customize all UI elements and control their behaviors according to the end user’s requirements using the control’s rich set of client-side APIs.


Other supported frameworks

The Dropdown Tree component is also available in React, Angular, and Vue frameworks. Check out the different Dropdown Tree platforms from the links below:


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