jQuery CheckBox
Bind to the indeterminate event by type: jqxCheckBox. Author: http://jqwidgets.com
by jqwidgets
HTML
<link rel="stylesheet" href="https://jqwidgets.com/public/jqwidgets/styles/jqx.base.css">
<script src="https://jqwidgets.com/public/jqwidgets/jqx-all.js"></script>
<link rel="stylesheet" href="https://jqwidgets.com/public/jqwidgets/styles/jqx.energyblue.css">
<div id='jqxCheckBox'>Entertainment</div>
JavaScript
$("#jqxCheckBox").jqxCheckBox({
width: '300px',
height: 25,
theme: 'energyblue',
checked:null,
hasThreeStates:true
});
$('#jqxCheckBox').on('indeterminate', function (event) {
alert("The state is indeterminated")
});