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Set the disabled state

RadioButton component can be enabled/disabled by giving disabled property. To disable RadioButton component, the disabled property can be set as true.

The following example illustrates how to disable a radio button and the selected one is displayed using change event.

Source
Preview
app.ts
index.html
styles.css
import { RadioButton, ChangeEventArgs } from '@syncfusion/ej2-buttons';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

// Initialize RadioButton component.
let radiobutton: RadioButton = new RadioButton({ label: 'Option 1', name: 'default', checked: true, change: onChange });

// Render initialized RadioButton.
radiobutton.appendTo('#element1');

radiobutton = new RadioButton({ label: 'Option 2', name: 'default', disabled: true, change: onChange });
radiobutton.appendTo('#element2');

radiobutton = new RadioButton({ label: 'Option 3', name: 'default', change: onChange });
radiobutton.appendTo('#element3');

function onChange(args: ChangeEventArgs): void {
   document.getElementById('text').innerText = 'Selected : ' + this.label;
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 RadioButton</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="styles.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'>
        <ul>
            <li><div id="text">Selected: Option 1</div></li>
            <li><input type='radio' id='element1'/></li>
            <li><input type='radio' id='element2'/></li>
            <li><input type='radio' id='element3'/></li>
      </ul>
    </div>
</body>

</html>
#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.e-radio-wrapper {
  margin-top: 18px;
}

li {
  list-style: none;
}

#text {
  font-size: 16px;
}