Collapse grouped rows at initial render in EJ2 TypeScript Grid control

13 Apr 20234 minutes 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.
index.ts
index.html
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;
    }
}
<!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="https://cdn.syncfusion.com/ej2/26.1.35/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-calendars/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/ej2-notifications/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/26.1.35/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>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Grid'></div>
    </div>
</body>
</html>