Javascript Auto Expand Textarea Example

If you need to see example of javascript textarea grow automatically. i explained simply about javascript auto expand textarea. i would like to show you javascript autosize textarea height. step by step explain how to make textarea auto resize using javascript.

If you need to set textarea auto height based on content using javascript then i will help you how to auto resize height of textarea in javascript. i will give you two examples of auto adjust textarea height using javascript.

So, let's see bellow preview and examples:

Preview:

Example 1:


<!DOCTYPE html>
<html>
<head>
    <title>Javascript Auto-resize Textarea as User Types Example</title>
</head>
<body>
  
<h1>Javascript Auto-resize Textarea as User Types Example - HDTuto.com</h1>
  
<strong>Body:</strong>
<br/>
<textarea id="body" style="width: 400px;"></textarea>
  
<script type="text/javascript">
    textarea = document.querySelector("#body"); 
    textarea.addEventListener('input', autoResize, false); 
  
    function autoResize() { 
        this.style.height = 'auto'; 
        this.style.height = this.scrollHeight + 'px'; 
    }
</script>
  
</body>
</html>

Example 2:


<!DOCTYPE html>
<html>
<head>
    <title>Textarea Auto Height Based on Content Jquery</title>
    <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
</head>
<body>
  
<h1>Textarea Auto Height Based on Content Jquery Example - HDTuto.com</h1>
  
<strong>Body:</strong>
<br/>
<textarea id="body" style="width: 400px;"></textarea>
   
<script type="text/javascript">
    $('#body').on('input', function () { 
        this.style.height = 'auto'; 
  
        this.style.height = (this.scrollHeight) + 'px'; 
    }); 
</script>
  
</body>
</html>

Javascript Auto Expand Textarea Example

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