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Enable/Disable Tree Grid and its actions in JavaScript (ES5) TreeGrid control

You can enable/disable the Tree Grid and its actions by applying/removing corresponding CSS styles.

To enable/disable the Tree Grid and its actions, follow the given steps:

Step 1:

Create CSS class with custom style to override the default style of Tree Grid.

    .disabletreegrid {
        pointer-events: none;
        opacity: 0.4;
    }
    .wrapper {
        cursor: not-allowed;
    }

Step 2:

Add/Remove the CSS class to the Tree Grid in the click event handler of Button.

    document.getElementById('primarybtn').addEventListener('click', () => {
        if (treegrid.element.classList.contains('disabletreegrid')) {
            treegrid.element.classList.remove('disabletreegrid');
            document.getElementById("TreeGridParent").classList.remove('wrapper');
        }
        else {
            treegrid.element.classList.add('disabletreegrid');
            document.getElementById("TreeGridParent").classList.add('wrapper');
        }
    });

In the below demo, the button click will enable/disable the Tree Grid and its actions.

Source
Preview
index.js
index.css
index.html
ej.treegrid.TreeGrid.Inject(ej.treegrid.Edit, ej.treegrid.Toolbar);

var treegrid = new ej.treegrid.TreeGrid({
    dataSource: sampleData,
    childMapping: 'subtasks',
    treeColumnIndex: 1,
    height: 220,
    toolbar: ['Add', 'Edit', 'Delete', 'Update', 'Cancel'],
    editSettings: { allowAdding:true, allowEditing: true, allowDeleting:true, mode: 'Row' },
    columns: [
     { field: 'taskID', headerText: 'Task ID', isPrimaryKey: true, width: 90, textAlign: 'Right' },
     { field: 'taskName', headerText: 'Task Name', width: 180, textAlign: 'Left' },
     { field: 'startDate', headerText: 'Start Date', width: 90, textAlign: 'Right', type: 'date', format: 'yMd'},
     { field: 'duration', headerText: 'Duration', width: 80, textAlign: 'Right' }
    ],
});
treegrid.appendTo('#TreeGrid');

var button = new ej.buttons.Button({}, '#primarybtn');

document.getElementById('primarybtn').addEventListener('click', () => {
    if (treegrid.element.classList.contains('disabletreegrid')) {
        treegrid.element.classList.remove('disabletreegrid');
        document.getElementById("TreeGridParent").classList.remove('wrapper');
    }
    else {
        treegrid.element.classList.add('disabletreegrid');
        document.getElementById("TreeGridParent").classList.add('wrapper');
    }
});
#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.disabletreegrid {
  pointer-events: none;
  opacity: 0.4;
}
.wrapper {
  cursor: not-allowed;
}
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-grids/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-treegrid/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-calendars/styles/material.css" rel="stylesheet">
    
    
    
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
</head>
<body>
    
    <div id="container">
        <button id="primarybtn">Enable/Disable TreeGrid</button>
        <div id="TreeGridParent">
        <div id="TreeGrid"></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>