HTML | DOM Input Radio defaultChecked Property

Last Updated : 26 Aug, 2022

The DOM Input Radio defaultChecked Property in HTML DOM is used for returning the default value of the checked attribute. It returns a true if the radio button is checked by default otherwise it returns false.

Syntax:

radioObject.defaultChecked

Below Program illustrates how to return the Property.

Example:

HTML

<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            text-align: center;
        }
         
        h1 {
            color: green;
        }
    </style>
</head>
<body>
    <h1>
      GeeksforGeeks
    </h1>
    <h2>
      HTML DOM Input Radio default Checked Property
    </h2>
    <form id="myGeeks">
        Radio Button:
        <input type="radio" 
               checked=true
               id="radioID" 
               value="Geeks_radio" 
               name="Geek_radio" 
               disabled>
        <br>
        <br>
    </form>
    <button onclick="GFG()">
        Click!
    </button>
    <p id="GFG"
       style="font-size:25px;
              color:green;">
    </p>
    <script>
        function GFG() {
 
            // Returning Input Radio defaultChecked Property
            var x =
                document.getElementById(
                  "radioID").defaultChecked;
           
            document.getElementById(
              "GFG").innerHTML = x;
        }
    </script>
</body>
</html>