HTML | DOM Input Time readOnly Property

Last Updated : 14 Dec, 2021

The DOM Input Time readOnly Property in HTML DOM is used to set or return whether the Time Field should be read-only or not. It means that a user can not modify or changes a 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.
```
timeObject.readOnly
```
It is used to set the readOnly property.
```
timeObject.readOnly = true|false
```

Property Values:

true: It defines that Time field is read only.
false: It defines that Time field is not read only. It is false by default.

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

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

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        DOM Input Time readOnly Property 
    </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">  
                GeeksForGeeks  
            </h1> 
  
        <h2> 
          DOM Input Time readOnly Property 
      </h2> 
  
        <label for="uname"
               style="color:green"> 
            <b>Enter time</b> 
        </label> 
  
        <input type="time" 
               id="gfg"
               placeholder="Enter time"
               readonly> 
  
        <br> 
        <br> 
  
        <button type="button" 
                onclick="geeks()"> 
            Click 
        </button> 
  
        <p id="GFG"
           style="font-size:24px; 
                  color:green;"> 
      </p> 
  
        <script> 
            function geeks() { 
                
                var link =  
                    document.getElementById( 
                      "gfg").value; 
                
                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 Time readOnly Property 
    </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">  
                GeeksForGeeks  
            </h1> 
  
        <h2> 
          DOM Input Time readOnly Property 
      </h2> 
  
        <label for="uname"
               style="color:green"> 
            <b>Enter time</b> 
        </label> 
  
        <input type="time" 
               id="gfg"
               placeholder="Enter time" 
               step="5"
               readonly> 
  
        <br> 
        <br> 
  
        <button type="button" 
                onclick="geeks()"> 
            Click 
        </button> 
  
        <p id="GFG"
           style="font-size:24px; 
                  color:green'"> 
      </p> 
  
        <script> 
            function geeks() { 
                
                var link =  
                    document.getElementById( 
                  "gfg").readOnly = "false"; 
                
                document.getElementById( 
                  "GFG").innerHTML = link; 
            } 
        </script> 
    </center> 
</body> 
  
</html> 