jQuery Tree Multiselect

This plugin allows you to add a sweet treeview frontend to a <select> node. The underlying <select> node can be used as it was before. This means you can still use $("select").val() or selectElement.value to get the value, as if there was no plugin. If you want to add options dynamically, please continue reading, there are some more steps you need to take.

Make sure you've got <meta charset="UTF-8"> in your <head> or some of the symbols may look strange.
Requires jQuery v1.8+

Demo

My website has a simple demo running.

How To Use

Set the multiple="multiple" attribute on your <select>
Add attributes to <option> nodes
Execute $.treeMultiselect(params) with whatever params you want

Setting up your `<select>`

Make sure your <select> has the multiple attribute set.

The <option> children can have the following attributes.

Option Attributes

Option Attribute name	Description
`selected`	Have the option pre-selected. This is actually part of the HTML spec. For specified ordering of these, use `data-index`
`readonly`	User cannot modify the value of the option. Option can be selected (ex. `<option selected readonly ...`)
`data-section`	The section the option will be in; can be nested
`data-description`	A description of the attribute; will be shown on the multiselect
`data-index`	For pre-selected options, display options in this order, lowest index first. Repeated items with the same index will be shown before items with a higher index. Otherwise items will be displayed in the order of the original `<select>`

All of the above are optional.

Your data-section can have multiple section names, separated by the sectionDelimiter option. If you don't have a data-section on an option, the option will be on the top level (no section).

Ex. data-section="top/middle/inner" will show up as

top
- middle
  - inner
    - your option

API

`$.treeMultiselect(params)`

Renders a tree for the given jQuery <select> nodes. params is optional.

$("select").treeMultiselect();

let params = {searchable: true}; $("select").treeMultiselect(params);

function treeOnChange(allSelectedItems, addedItems, removedItems) {   console.log("something changed!"); }  $("select").treeMultiselect({   allowBatchSelection: false,   onChange: treeOnChange,   startCollapsed: true });

Params

Name	Default	Description
`allowBatchSelection`	`true`	Sections have checkboxes which when checked, check everything within them
`collapsible`	`true`	Adds collapsibility to sections
`enableSelectAll`	`false`	Enables selection of all or no options
`selectAllText`	`Select All`	Only used if `enableSelectAll` is active
`unselectAllText`	`Unselect All`	Only used if `enableSelectAll` is active
`freeze`	`false`	Disables selection/deselection of options; aka display-only
`hideSidePanel`	`false`	Hide the right panel showing all the selected items
`maxSelections`	`0`	A number that sets the maximum number of options that can be selected. Any positive integer is valid; anything else (such as `0` or `-1`) means no limit
`onChange`	`null`	Callback for when select is changed. Called with (allSelectedItems, addedItems, removedItems), each of which is an array of objects with the properties `text`, `value`, `initialIndex`, and `section`
`onlyBatchSelection`	`false`	Only sections can be checked, not individual items
`sortable`	`false`	Selected options can be sorted by dragging (requires jQuery UI)
`searchable`	`false`	Allows searching of options
`searchParams`	`['value', 'text', 'description', 'section']`	Set items to be searched. Array must contain `'value'`, `'text'`, or `'description'`, and/or `'section'`
`sectionDelimiter`	`/`	Separator between sections in the select option `data-section` attribute
`showSectionOnSelected`	`true`	Show section name on the selected items
`startCollapsed`	`false`	Activated only if `collapsible` is true; sections are collapsed initially

Examples

`.remove()`

Removes the tree from the DOM. Leaves the original <select> intact.

let trees = $("select").treeMultiselect({searchable: true}); let firstTree = trees[0]; firstTree.remove();

`.reload()`

Reinitializes the tree. You can add <option> children to the original <select> and call .reload() to render the new options. User-changed selections will be saved.

let trees = $("select").treeMultiselect(); let firstTree = trees[0];  // add an option $("select#id").append("<option value='newValue' data-section='New Section' selected='selected' data-description='New value'>New Value</option>"); firstTree.reload();

Installation

Load jquery.tree-multiselect.min.js on to your web page. The css file is optional (but recommended).

You can also use bower - bower install tree-multiselect

How to build

You need to have grunt-cli installed so you can run the grunt command.

Run tests: grunt or grunt test
Build dist JavaScript file: grunt build
Build Sass: grunt sass
Build everything: grunt release

FAQ

Help! The first element is selected when I create the tree. How do I make the first element not selected? You didn't set the multiple attribute on your <select>. This is a property of single-option select nodes - the first option is selected.

License

MIT licensed.

jQuery Tree Multiselect