Drop Down Tree is an easy-to-use jQuery plugin for classifying transmitted data. The plugin displays a combo, which embeds a collapsible tree drawn by the transmitted data. The plugin has features of dynamic search and filter. The appearance is easy customizable using CSS. Drop Down Tree plugin is developed using only JavaScript. There is no need for special programming knowledge to use the plugin – the parameters have a structure of a typical JavaScript object. Key Benefits:

• Collapsible tree view: feature of collapse/expand tree elements
• Autocomplete, filter and search works correctly under all browsers including Edge, old and new versions of Safari, Opera, Internet Explorer, etc.
• Appearance is easy customizable using CSS and responsive design.
• Returns the id of the selected item instead of text.

You can see detailed documentation here