Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <link rel="stylesheet" href="../../code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css"> <script src="../../code.jquery.com/jquery-1.8.3.min.js"></script> <script src="../../code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script> </head> <body> <div data-role="page"> <div data-role="header"> <h1>Text area</h1> </div> <div data-role="content"> <form method="post" action="demoform.asp"> <div data-role="fieldcontain"> <label for="info">Additional Information:</label> <textarea name="addinfo" id="info"></textarea> </div> <input type="submit" data-inline="true" value="Submit"> </form> <p><b>Note:</b> The text area will automatically grow to fit new lines as you type some text. Try to fill the area with some text and see how it works.</p> </div> </div> </body> </html>
Result:
W3Schools.com - Try it yourself