You can check and uncheck the checkboxes of tree view by clicking the tree node using the nodeClicked event of TreeView.
ej.base.enableRipple(true);
/**
* TreeView check/uncheck the check box, while clicking on the tree node text sample
*/
// Data source for TreeView component
var countries = [
{ id: 1, name: 'Australia', hasChild: true, expanded: true },
{ id: 2, pid: 1, name: 'New South Wales' },
{ id: 3, pid: 1, name: 'Victoria' },
{ id: 4, pid: 1, name: 'South Australia' },
{ id: 6, pid: 1, name: 'Western Australia' },
{ id: 7, name: 'Brazil', hasChild: true },
{ id: 8, pid: 7, name: 'Paraná' },
{ id: 9, pid: 7, name: 'Ceará' },
{ id: 10, pid: 7, name: 'Acre' },
{ id: 11, name: 'China', hasChild: true },
{ id: 12, pid: 11, name: 'Guangzhou' },
{ id: 13, pid: 11, name: 'Shanghai' },
{ id: 14, pid: 11, name: 'Beijing' },
{ id: 15, pid: 11, name: 'Shantou' },
{ id: 16, name: 'France', hasChild: true },
{ id: 17, pid: 16, name: 'Pays de la Loire' },
{ id: 18, pid: 16, name: 'Aquitaine' },
{ id: 19, pid: 16, name: 'Brittany' },
{ id: 20, pid: 16, name: 'Lorraine' },
{ id: 21, name: 'India', hasChild: true },
{ id: 22, pid: 21, name: 'Assam' },
{ id: 23, pid: 21, name: 'Bihar' },
{ id: 24, pid: 21, name: 'Tamil Nadu' },
{ id: 25, pid: 21, name: 'Punjab' }
];
// Render the TreeView with checkboxes
var treeObj = new ej.navigations.TreeView({
fields: { dataSource: countries, id: 'id', parentID: 'pid', text: 'name', hasChildren: 'hasChild' },
showCheckBox: true,
nodeClicked: nodeCheck,
keyPress: nodeCheck
});
treeObj.appendTo('#tree');
function nodeCheck(args) {
var checkedNode = [args.node];
if (args.event.target.classList.contains('e-fullrow') || args.event.key == "Enter") {
var getNodeDetails = treeObj.getNodeData(args.node);
if (getNodeDetails.isChecked == 'true') {
treeObj.uncheckAll(checkedNode);
} else {
treeObj.checkAll(checkedNode);
}
}
}<html lang="en"><head>
<script src="https://cdn.syncfusion.com/ej2/21.1.35/dist/ej2.min.js" type="text/javascript"></script>
</head><body>
<title>Essential JS 2 for TreeView </title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Essential JS 2 for TreeView UI Control">
<meta name="author" content="Syncfusion">
<link href="index.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-base/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-buttons/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-navigations/styles/material.css" rel="stylesheet">
<div id="container">
<div id="treeparent">
<div id="tree"></div>
</div>
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>#container {
visibility: hidden;
}
#loader {
color: #008cff;
height: 40px;
width: 30%;
position: absolute;
font-family: 'Helvetica Neue','calibiri';
font-size: 14px;
top: 45%;
left: 45%;
}
#treeparent {
display: block;
max-width: 350px;
max-height: 350px;
margin: auto;
overflow: auto;
border: 1px solid #dddddd;
border-radius: 3px;
}