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HTML | DOM Input Text readOnly Property

  • Difficulty Level : Basic
  • Last Updated : 07 Dec, 2021

The Input Text readOnly property in HTML DOM is used to set or return whether a text 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 returns the readOnly property.
textObject.readOnly
  • it is used to Set the readOnly property.
textObject.readOnly = true|false

Property Values: It accepts two value which are listed below: 

  • true: It defines that the text field is read only.
  • false: It is the default value. It defines that the text field is not read only.

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

Example 1: This example illustrates how to return Input Text readOnly property.  

HTML




<!DOCTYPE html> 
<html
  
<head
    <title
        HTML DOM Input Text readOnly Property
    </title
</head
  
<body style="text-align:center;"
  
    <h1>GeeksForGeeks</h1
  
    <h2>DOM Input Text readOnly Property</h2
      
    <form id="myGeeks">
        <input type="text" id="text_id" readonly> 
    </form><br>
      
    <button onclick="myGeeks()">Click Here!</button
      
    <p id="GFG" style="font-size:25px;"></p>
   
      
    <!-- script to return the readOnly Property-->
    <script
        function myGeeks() { 
            var txt = document.getElementById("text_id").readOnly; 
            document.getElementById("GFG").innerHTML = txt; 
        
    </script
</body
  
</html>                    

Output: 
Before Clicking the Button: 

After Clicking the Button: 

Example 2: This example illustrates how to set Input Text readOnly property. 

HTML




<!DOCTYPE html> 
<html
  
<head
    <title
        HTML DOM Input Text readOnly Property
    </title
</head
  
<body style="text-align:center;"
  
    <h1>GeeksForGeeks</h1
  
    <h2>DOM Input Text readOnly Property</h2
      
    <form id="myGeeks">
        <input type="text" id="text_id" readonly> 
    </form><br>
      
    <button onclick="myGeeks()">Click Here!</button
      
    <p id="GFG" style="font-size:25px;"></p>
   
      
    <!-- script to set the readOnly Property-->
    <script
        function myGeeks() { 
            var txt = document.getElementById("text_id").readOnly
                    = false; 
                      
            document.getElementById("GFG").innerHTML = txt; 
        
    </script
</body
  
</html>                    

Output: 
Before Clicking the Button: 

After Clicking the Button: 
 

Supported Browsers: The browser supported by DOM Input Text readOnly Property are listed below: 

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

 


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