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Collapse all grouped rows at initial rendering in JavaScript Grid control

23 Mar 2023 / 1 minute to read

You can collapse all the grouped rows at initial rendering by using dataBound event with collapseAll method of the grid.

In the below demo, all the grouped rows are collapsed at initial rendering.

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import { Grid, Group } from '@syncfusion/ej2-grids';
import { data } from './datasource.ts';

Grid.Inject(Group);

var initial = true;

let grid: Grid = new Grid({
    dataSource: data,
    allowGrouping: true,
    groupSettings: { columns: ['ShipCity'] },
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
        { field: 'CustomerID', headerText: 'Customer ID', width: 150 },
        { field: 'ShipCity', headerText: 'Ship City', width: 150 },
        { field: 'ShipName', headerText: 'Ship Name', width: 150 }
    ],
    dataBound: bound,
    height: 267
});
grid.appendTo('#Grid');

function bound() {
    if(initial === true) {
        grid.groupModule.collapseAll();
        initial = false;
    }
}
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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/ej2/20.4.48/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-calendars/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-notifications/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/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>
    <style>
        .e-row[aria-selected="true"] .e-customizedExpandcell {
            background-color: #e0e0e0;
        }
        .e-grid.e-gridhover tr[role='row']:hover {
            background-color: #eee;
        }
        .e-expand::before {
        content: '\e5b8';
    }
    .empImage {
        margin: 6px 16px;
        float: left;
        width: 50px;
        height: 50px;
    }
    </style>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Grid'></div>
    </div>
</body>
</html>
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