HTML | DOM Input Password readOnly Property

Difficulty Level : Basic
Last Updated : 08 Mar, 2019

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 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.

<!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.

<!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>                     