To show selected state on initial render, checked
property should to added to the corresponding
input element.
The following example illustrates how to show selected state on initial render.
import * as React from 'react';
import * as ReactDom from 'react-dom';
// To render checkbox type ButtonGroup.
class App extends React.Component {
render() {
return (<div>
<div className='e-btn-group'>
<input type="checkbox" id="checkbold" name="font" value="bold" checked={true}/>
<label className="e-btn" htmlFor="checkbold">Bold</label>
<input type="checkbox" id="checkitalic" name="font" value="italic"/>
<label className="e-btn" htmlFor="checkitalic">Italic</label>
<input type="checkbox" id="checkline" name="font" value="underline"/>
<label className="e-btn" htmlFor="checkline">Underline</label>
</div>
</div>);
}
}
ReactDom.render(<App />, document.getElementById('buttongroup'));
<!DOCTYPE html>
<html lang="en">
<head>
<title>Syncfusion React Button</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for React Components" />
<meta name="author" content="Syncfusion" />
<link href="//cdn.syncfusion.com/ej2/20.2.36/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.2.36/ej2-buttons/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.2.36/ej2-popups/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.2.36/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
<link href="index.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='buttongroup'>
<div id='loader'>Loading....</div>
</div>
</body>
</html>
import * as React from 'react';
import * as ReactDom from 'react-dom';
// To render checkbox type ButtonGroup.
class App extends React.Component<{}, {}> {
public render() {
return (
<div>
<div className='e-btn-group'>
<input type="checkbox" id="checkbold" name="font" value="bold" checked={true}/>
<label className="e-btn" htmlFor="checkbold">Bold</label>
<input type="checkbox" id="checkitalic" name="font" value="italic" />
<label className="e-btn" htmlFor="checkitalic">Italic</label>
<input type="checkbox" id="checkline" name="font" value="underline"/>
<label className="e-btn" htmlFor="checkline">Underline</label>
</div>
</div>
);
}
}
ReactDom.render(<App />,document.getElementById('buttongroup'));