Update Textarea value JavaScript

In this tutorial we will learn How To Update Textarea value with JavaScript. We can use value property, innerHTML property or textContent property to update or set the value of the textarea tag.

value property

value property is used to set, update or get the value of input elements. In this example it can be used to update the value of textarea tag.

innerHTML property

innerHTML property is used to set or update the HTML content of html tags. In this example we can use innerHTML property to update the value of textarea tag.

innerHTML property can also update or change the HTML code inside any tag along with it's text.

textContent property

textContent property is used to set the text of the HTML tags. We can also use this property to update the text of textarea tag.

HTML Code

HTML Code is given below, in this code we have a textarea tag and a button tag.

<!DOCTYPE html>
<html>
<head>
<title>Update Textarea value JavaScript</title>
</head>    
<body>

<textarea id="textarea">This is HowToCodeSchool.com</textarea>
<br>
<button onclick="updateValue()">Update Value</button>    
    
<script src="script.js"></script>    
</body>
</html>

JavaScript Code

Take a look at the JavaScript code, in this code getElementById() method is used to select the textarea tag and value property is used to update the value of textarea.

<script>
function updateValue()
{
var textarea  = document.getElementById('textarea');
textarea.value = "New Text";
}
</script>

With innerHTML property

<script>
function updateValue()
{
var textarea  = document.getElementById('textarea');
textarea.innerHTML = "New Text";
}
</script>

With textContent property

<script>
function updateValue()
{
var textarea  = document.getElementById('textarea');
textarea.textContent = "New Text";
}
</script>

Demo

Video Tutorial

Watch video tutorial on How To Update Textarea value in JavaScript.

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