HTML | DOM Input Checkbox defaultChecked Property

The Input Checkbox defaultChecked property in HTML is used to return the default value of checked attribute. It has a boolean value which returns true if the checkbox is checked by default, otherwise returns false.

Syntax:

checkboxObject.defaultChecked

Example: This example illustrates the Input Checkbox defaultChecked property.



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<!DOCTYPE html> 
<html
    <head
        <title>
            DOM Input defaultChecked disabled Property
        </title
    </head
      
    <body style="text-align:center;"
      
        <h1 style="color:green;">
            GeeksforGeeks
        </h1
          
        <h2>DOM Input Checkbox defaultChecked Property</h2
          
        <form id="myGeeks"
          
            <!-- Below input elements have attribute
                 checked -->
            <input type="checkbox" name="check" id="GFG"
                    value="1" Checked>Checked by default<br
                      
            <input type="checkbox" name="check" value="2">
                    Not checked by default<br
        </form><br>
          
        <button onclick="myGeeks()">
            Submit
        </button>
          
        <p id="sudo" style="color:green;font-size:25px;"></p>
          
        <!-- Script to return the Input Checkbox 
            defaultChecked Property -->
        <script>
            function myGeeks() {
                var g = document.getElementById("GFG").defaultChecked;
                document.getElementById("sudo").innerHTML = g;
            }
        </script>
    </body
</html>                             

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Output:
Before clicking on the Button:

After clicking on the Button:

Supported Browsers: The browser supported by DOM input defaultchecked property are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari


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