HTML | DOM Input Password readOnly Property

Last Updated : 25 Aug, 2022

The DOM Input Password readOnly Property is used to set or return whether a Password Field should be read-only or not. It means that a user can not modify or changes the content already present in a particular Element (However, a user can tab to it, highlight it, and copy the text from it) whereas a JavaScript can be used to change the read-only value and make the input field editable.

Syntax:

It is used to return the readOnly property.

passwordObject.readOnly

It is used to Set the readOnly property.

passwordObject.readOnly = true|false

Property Values:

true: It defines that password field is read only.
false: It is a default value. It defines that password field is not read only.

Return Value: It returns a boolean value which represent the password field is read only or not.

Example-1: This example illustrates how to return the property.

HTML

<!DOCTYPE html> 
<html> 
<body style="text-align:center;"> 
    <h1 style="color:green;"> 
        GeeksForGeeks 
    </h1> 
    <h2>DOM Input Password readOnly Property</h2> 
    <form id="myGeeks">
     Password: <input type="password"
        id="myPsw"
          readonly>
         </form>
    <br><br>
    <button onclick="myFunction()"> 
        Click Here! 
    </button> 
    <p id="demo" style="color:green;font-size:20px;"></p> 
    <script> 
        function myFunction() { 
            var x = 
            document.getElementById( 
            "myPsw").readOnly
             
            document.getElementById( 
            "demo").innerHTML = x; 
        } 
    </script> 
</body> 
</html>

Output:

Before clicking on the button:

After clicking on the button:

Example-2: This example illustrates how to set the property.

HTML

<!DOCTYPE html> 
<html> 
<body style="text-align:center;"> 
    <h1 style="color:green;"> 
        GeeksForGeeks 
    </h1> 
    <h2>DOM Input Password readOnly Property</h2> 
    <form id="myGeeks">
     Password: <input type="password"
        id="myPsw"
          readonly>
         </form>
    <br><br>
    <button onclick="myFunction()"> 
        Click Here! 
    </button> 
    <p id="demo" style="color:green;font-size:20px;"></p> 
    <script> 
        function myFunction() { 
            var x = 
            document.getElementById( 
            "myPsw").readOnly = false;
             
            document.getElementById( 
            "demo").innerHTML = x; 
        } 
    </script> 
</body> 
</html>