Transforms a <select> containing one or more <optgroup> into two chained <select>
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Transforms a <select> containing one or more <optgroup> in two chained <select>.

This script is better version of bootstrap-selectsplitter, for multi select with more script options. If you want to select more options, you must hold CTRL key. (default select behaviour)



Becomes this:



  • boostrap CSS > 3.0
  • jquery > 1.9.1
<link rel="stylesheet" href="//">
<script src="//"></script>


bower install bootstrap-multiselectsplitter


Create a <select> with at least one <optgroup>.

Each <option> of your <select> must have a unique value.

<select multiple="multiple">
  <optgroup label="Category 1">
    <option value="1">Choice 1</option>
    <option value="2">Choice 2</option>
    <option value="3">Choice 3</option>
    <option value="4">Choice 4</option>
  <optgroup label="Category 2">
    <option value="5">Choice 5</option>
    <option value="6">Choice 6</option>
    <option value="7">Choice 7</option>
    <option value="8">Choice 8</option>
  <optgroup label="Category 3">
    <option value="9">Choice 9</option>
    <option value="10">Choice 10</option>
    <option value="11">Choice 11</option>
    <option value="12">Choice 12</option>


Online demo


  • selectSize - define size of new selects ... when null, automatically setted by longest option count DEFAULT: null
  • maxSelectSize - define max size of new selects DEFAULT: null
  • clearOnFirstChange - when true, second select will be cleared when the first changes DEFAULT: false
  • onlySameGroup - when true, only options from one optGroup can be selected (option works only for multiselect) DEFAULT: false
  • groupCounter - when true, there will be added counter of how many options are selected (option works only for multiselect) DEFAULT: false
  • maximumSelected - define how many options can be selected. Can be integer or function with arguments ($firstSelect, $secondSelect) that return integer. (option works only for multiselect) DEFAULT: null
  • afterInitialize - function with 2 arguments ($firstSelect, $secondSelect) - called after initialization DEFAULT: null
  • maximumAlert - function called when selected more than 'maximumSelected' options ... DEFAULT: function (maximumSelected) { alert("Only " + maximumSelected + " values can be selected"); }
  • createFirstSelect - function for creating option in first select DEFAULT: function (label, $originalSelect) { return '<option>' + label + '</option>'; }
  • createSecondSelect - function for creating option in second select DEFAULT: function (label, $firstSelect) { return '<option>' + label + '</option>'; }
  • template - template for new selects DEFAULT: <div class="row" data-multiselectsplitter-wrapper-selector><div class="col-xs-12 col-sm-6"><select class="form-control" data-multiselectsplitter-firstselect-selector></select></div><div class="col-xs-12 col-sm-6"><select class="form-control" data-multiselectsplitter-secondselect-selector></select></div></div>


1.0.1 - added functions for disabling/enabling

1.0.0 - release

Copyright and license

Copyright (C) 2016 Ing. Matúš Ferko

Licensed under the MIT license.