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Headers in JavaScript TreeGrid control

31 Jan 2023 / 2 minutes to read

Header text

By default, column header title is displayed from column field value. To override the default header title, you have to define the headerText value.

Source
Preview
index.ts
index.html
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import { TreeGrid } from '@syncfusion/ej2-treegrid';
import { sampleData } from './datasource.ts';

let treeGridObj: TreeGrid = new TreeGrid({
    dataSource: sampleData,
    childMapping: 'subtasks',
    height: 315,
    treeColumnIndex: 1,
    columns: [
                { field: 'taskID', headerText: 'Task ID', 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' }
    ]
});

treeGridObj.appendTo('#TreeGrid');
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<!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/ej2/20.4.38/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-treegrid/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-calendars/styles/material.css" rel="stylesheet" />
    
    
    
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    
    
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='TreeGrid'></div>        
    </div>
</body>
</html>
  • If both the field and headerText are not defined in the column, the column renders with “empty” header text.

Header template

You can customize the header element by using the headerTemplate property.

Source
Preview
index.ts
index.html
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import { TreeGrid } from '@syncfusion/ej2-treegrid';
import { headerData } from './datasource.ts';
let treeGridObj: TreeGrid = new TreeGrid({
    dataSource: headerData,
    childMapping: 'subtasks',
    height: 315,
    columns: [  
        { field: 'taskName', headerTemplate: '#projectName', width: 220 },
        { field: 'startDate', headerTemplate: '#dateTemplate', format: 'yMd', textAlign: 'Right' },
        { field: 'duration', headerTemplate: '#durationTemplate', textAlign: 'Right' },
        { field: 'progress', headerTemplate: '#progressTemplate', textAlign: 'Right' }
    ]
});

treeGridObj.appendTo('#TreeGrid');
Copied to clipboard
<!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/ej2/20.4.38/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-treegrid/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-calendars/styles/material.css" rel="stylesheet" />
    
    
    
    <link href="//cdn.syncfusion.com/ej2/20.4.38/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    
    
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>
<body>
    <script id="template" type="text/x-template">
        <div class="template_checkbox">
            ${if(approved)}
            <input type="checkbox" checked> ${else}
            <input type="checkbox"> ${/if}
        </div>
    </script>
        
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='TreeGrid'></div>        
    </div>
    <script type="text/x-template" id="projectName">
        <div>
            <div>
                <img src="taskname.png" width="20" height="20" class="e-image" />  Task Name
            </div>
        </div>
    </script>
    <script type="text/x-template" id="dateTemplate">
        <div>
            <div>
                <img src="startdate.png" width="20" height="20" class="e-image" />  Start Date
            </div>
        </div>
    </script>
    <script type="text/x-template" id="durationTemplate">
        <div>
            <div>
                <img src="duration.png" width="20" height="20" class="e-image" />  Duration
            </div>
        </div>
    </script>
    <script type="text/x-template" id="progressTemplate">
        <div>
            <div>
                <img src="progress.png" width="20" height="20" class="e-image" />  Progress
            </div>
        </div>
    </script>
</body>
</html>