Check box selection in EJ2 JavaScript Grid control

1 Mar 202424 minutes to read

Checkbox selection in the Grid control allows you to provide an option to select multiple records by using a checkbox in each row. This feature is particularly useful when you need to perform bulk actions or operations on selected records within the Grid.

To render checkbox in each grid row, you need to use checkbox column with type as checkbox using column type property.

Here’s an example of how to enable check box selection using type property in the Grid control:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    columns: [
        { type: 'checkbox', width:50 },
        { 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 }
    ],
    height: 315
});
grid.appendTo('#Grid');
<!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/ej2/27.2.2/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/27.2.2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id="container">
        <div id="Grid"></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>

By default selection is allowed by clicking a grid row or checkbox in that row. To allow selection only through checkbox, you can set selectionSettings->checkboxOnly property to true.

Selection can be persisted on all the operations using selectionSettings->persistSelection property. For persisting selection on the Grid, any one of the column should be defined as a primary key using columns->isPrimaryKey property.

Checkbox selection mode

The checkbox selection mode in the Grid allows you to select rows either by clicking on checkboxes or by clicking on the rows themselves. This feature provides two types of checkbox selection modes that can be set using the selectionSettings->checkboxMode property. The available modes are:

Default: This is the default value of the checkboxMode. In this mode, you can select multiple rows by clicking rows one by one. When you click on a row, the checkbox associated with that row also switches to the ‘checked’ state.
ResetOnRowClick: In ResetOnRowClick mode, when clicking on row it will reset previously selected row. Also you can perform multiple-selection in this mode by press and hold CTRL key and click the desired rows. To select range of rows, press and hold the SHIFT key and click the rows.

In the following example, it demonstrates how to dynamically enable and change the checkboxMode using the DropDownList control:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    columns: [
        { type: 'checkbox', width:50 },
        { 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 }
    ],
    height: 315
});
grid.appendTo('#Grid');

var dropdownData = [
    { text: 'Default', value: 'Default' },
    { text: 'ResetOnRowClick', value: 'ResetOnRowClick' }
  ];
  
var dropDownColumn = new ej.dropdowns.DropDownList({
    index:0,
    width: 150,
    dataSource: dropdownData,
    change: valueChange,
});
dropDownColumn.appendTo('#dropdown');

function valueChange(args) {
    grid.selectionSettings.checkboxMode = args.value;
}
<!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/ej2/27.2.2/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/27.2.2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id="container">
        <div style="padding-bottom: 10px">
            <label  style="padding: 30px 17px 0 0" >Choose checkbox selection mode:</label>
            <input type="text" id="dropdown" />
        </div>
        <div id="Grid"></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>

Hide selectall checkbox in column header

You can hide the select all checkbox in the column header of the Syncfusion Grid. This is a useful feature in various scenarios where you want to customize the appearance and behavior of the checkboxes within the grid.

By default, when you set the column type as checkbox, it renders a column with checkboxes for selection purposes. However, if you want to hide the header checkbox, you can achieve this by defining an empty HeaderTemplate directive in the grid Column.

Here’s an example of how to hide selectall checkbox in column header using empty HeaderTemplate directive in the Grid control:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    allowPaging: true,
    selectionSettings : { type: 'Multiple' },
    columns: [
        { type: 'checkbox', width:120, headerTemplate: '#headerTemplate' },
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
        { field: 'CustomerID', headerText: 'Customer ID', width: 150 },
        { field: 'OrderDate', headerText: 'Order Date', format:'yMd', textAlign:'Right', width: 130 },
        { field: 'Freight', headerText: 'Freight', format:'C2', textAlign:'Right', width: 120 },
        { field: 'ShippedDate', headerText: 'ShippedDate', format:'yMd', textAlign:'Right', width: 130 },
        { field: 'ShipCountry', headerText: 'ShipCountry', width: 150 }
    ],
    height: 315
});
grid.appendTo('#Grid');
<!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/ej2/27.2.2/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/27.2.2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id="container">
        <script id="headerTemplate" type="text/x-template">
        </script>
        <div id="Grid"></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>

Prevent specific rows from being selected in checkbox selection

The checkbox selection mode allows you to select rows either by clicking on checkboxes or by clicking on the rows themselves. However, there might be scenarios where you want to prevent specific rows from being selected based on certain conditions or business requirements.

To achieve this, you can use the rowDataBound event of the Grid. The rowDataBound event is triggered for each row after it is bound to the data source. In this event, you can check the row data and determine whether the row should be selectable or not. If you want to prevent the row from being selected, you can set the isSelectable argument of the event to false.

In the following sample, the selection of specific rows has been prevented based on the isSelectable argument in the rowDataBound event.

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    allowSelection:true,
    selectionSettings: { type: 'Multiple', persistSelection: true },
    allowFiltering:true,
    filterSettings: { type: 'CheckBox' },
    allowPaging:true,
    pageSettings: { pageSize: 5 },
    editSettings: {
        allowEditing: true,
        allowAdding: true,
        allowDeleting: true,
        mode: 'Normal',
    },
    toolbar: ['Add', 'Edit', 'Delete', 'Update', 'Cancel', 'Search'],
    height: 400,
    columns: [
        { type: 'checkbox', width: 120 },
        { field: 'List', headerText: 'List',  width: 120 },
        { field: 'OrderID', isPrimaryKey: true, headerText: 'Order ID',  width: 150 },
        { field: 'CustomerID', headerText: 'CustomerID',  width: 150 },
        { field: 'EmployeeID', headerText: 'Employee ID', width: 150 },
        { field: 'ShipCity', headerText: 'Ship City', width: 150 }
    ]
});
grid.appendTo('#Grid');

grid.rowDataBound = function(args) {
    args.isSelectable = args.data.List % 5 === 0; 
}

for (var i = 0; i < data.length; i++) {
    data[i]['List'] = i + 1;
}
<!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/ej2/27.2.2/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/27.2.2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id="container">
        <div id="Grid"></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>

How to select single row in checkbox selection mode

The EJ2 JavaScript Grid allows you to select only one row at a time within the Grid. This feature is particularly useful when you want to ensure that only a single row is selected, and any previous selections are cleared when a new row is selected.

To achieve single-row selection in checkbox selection mode within the Grid, you can handle the rowSelecting event and use the clearSelection method to clear any previous selections before selecting a new row. This ensures that only one row is selected at a time, and any prior selections are deselected when a new row is chosen.

When you set the checkboxMode property to ResetOnRowClick, it will reset the previously selected row when you click on a new row. Please note that this behavior applies to rows and not checkboxes, and it is the default behavior of the grid.

Here’s an example of how to select a single row in checkbox selection mode using the clearSelection method along with the rowSelecting event:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    allowPaging:true,
    rowSelecting:rowSelecting,
    selectionSettings : { type: 'Single', checkboxMode: 'ResetOnRowClick' },
    columns: [
        { type: 'checkbox', width:120 },
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
        { field: 'CustomerID', headerText: 'Customer ID', width: 150 },
        { field: 'OrderDate', headerText: 'Order Date', format:'yMd', textAlign:'Right', width: 130 },
        { field: 'Freight', headerText: 'Freight', format:'C2', textAlign:'Right', width: 120 },
        { field: 'ShippedDate', headerText: 'ShippedDate', format:'yMd', textAlign:'Right', width: 130 },
        { field: 'ShipCountry', headerText: 'ShipCountry', width: 150 }
    ],
    height: 315
});
grid.appendTo('#Grid');

function rowSelecting(args){
if (args.target && args.target.classList.contains('e-icons')) {
    grid.clearSelection();
  }
}
<!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/ej2/27.2.2/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/27.2.2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id="container">
        <div id="Grid"></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>

Allow selection only through checkbox click

By default, the Grid control allows selection by clicking either a grid row or the checkbox within that row. If you want to restrict selection so that it can only be done by clicking the checkboxes, you can set the selectionSettings->checkboxOnly property to true.

Here’s an example of how to enable selection only through checkbox click using checkboxOnly property:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    allowPaging:true,
    selectionSettings : { checkboxOnly: true },
    columns: [
        { type: 'checkbox', width:100 },
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
        { field: 'CustomerID', headerText: 'Customer Name', width: 150 },
        { field: 'OrderDate', headerText: 'Order Date', format:'yMd', textAlign:'Right', width: 130 },
        { field: 'Freight', headerText: 'Freight', format:'C2', textAlign:'Right', width: 120 },
        { field: 'ShippedDate', headerText: 'ShippedDate', format:'yMd', textAlign:'Right', width: 130 },
        { field: 'ShipCountry', headerText: 'ShipCountry', width: 150 }
    ],
    height: 315
});
grid.appendTo('#Grid');
<!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/ej2/27.2.2/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/27.2.2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id="container">
        <div id="Grid"></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>