HTML | DOM Input URL readOnly Property

Difficulty Level : Basic
Last Updated : 18 Mar, 2019

The DOM Input URL readOnly Property is used to set or return whether a URL 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.
```
urlObject.readOnly
```

It is used to Set the readOnly property.

urlObject.readOnly = true|false

Property Values:

true: It defines that url field is read only.
false: It defines that url field is not read only.

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

Example-1: This Example illustrates how to return the Property.

<!DOCTYPE html>
<html>
  
<head>
    <title>
        DOM Input URL readOnly Property
    </title>
</head>
  
<body>
    <center>
        <h1 style="color:green;"> 
                GeeksForGeeks 
            </h1>
  
        <h2>
          DOM Input URL readOnly Property
      </h2>
  
        <label for="uname" 
               style="color:green">
            <b>Enter URL</b>
        </label>
  
        <input type="url" 
               id="gfg" 
               placeholder="Enter URL" 
               size="20" 
               readonly>
  
        <br>
        <br>
  
        <button type="button"
                onclick="geeks()">
            Click
        </button>
  
        <p id="GFG"
           style="color:green;
                  font-size:25px;">
      </p>
  
        <script>
            function geeks() {
                var link = 
                    document.getElementById(
                      "gfg").readOnly;
                
                document.getElementById(
                  "GFG").innerHTML = link;
            }
        </script>
    </center>
</body>
  
</html>

Output:
Before Clicking On Button:

After Clicking On Button:

Example-2: This Example illustrates how to set the Property.

<!DOCTYPE html>
<html>
  
<head>
    <title>
        DOM Input URL readOnly Property
    </title>
</head>
  
<body>
    <center>
        <h1 style="color:green;"> 
                GeeksForGeeks 
            </h1>
  
        <h2>
          DOM Input URL readOnly Property
      </h2>
  
        <label for="uname"
               style="color:green">
            <b>Enter URL</b>
        </label>
  
        <input type="url"
               id="gfg"
               placeholder="Enter URL" 
               size="20" 
               readonly>
  
        <br>
        <br>
  
        <button type="button" 
                onclick="geeks()">
            Click
        </button>
  
        <p id="GFG" 
           style="color:green;font-size:25px;">
      </p>
  
        <script>
            function geeks() {
                
                // Set the read only property.
                var link = 
                    document.getElementById(
                      "gfg").readOnly = false;
                
                document.getElementById(
                  "GFG").innerHTML = link;
            }
        </script>
    </center>
</body>
  
</html>