HTML DOM Input Text readOnly property

The HTML DOM Input Text readOnly property is used for setting or returning if the input text field is read-only or not. The readOnly property makes the element non-editable but it can still be focused by tab or click. If there is a default value inside a read-only element then it is sent to a server on submit.

Syntax

Following is the syntax for −

Setting the readOnly property −

textObject.readOnly = true|false

Here, truly represents the text field is read-only while false represents otherwise. The readOnly property is set to false by default.

Example

Let us look at an example for the Input Text readOnly property −

<!DOCTYPE html>
<html>
<body>
<h1>Input Text readOnly property</h1>
USERNAME: <input type="text" id="USR" >
<p>Change the readOnly property of the above field by clicking the below button</p>
<button onclick="changeRead()">CHANGE</button>
<script>
   function changeRead() {
      document.getElementById("USR").readOnly = true;
   }
</script>
</body>
</html>

Output

This will produce the following output −

On clicking the CHANGE button you can’t change the text now and it will be submitted to the server on submit −

Updated on: 19-Aug-2019

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