How to clear textbox on HTML using Javascript
button, html, javascript, textarea
Solution
Just rename your function from `clear` to something like `clearTextarea` and it will work.
The `clear()` method refers to obsolete `document.clear()` method, which is described at MDN as:
This method used to clear the whole specified document in early (pre-1.0) versions of Mozilla. In recent versions of Mozilla-based applications as well as in Internet Explorer and Netscape 4 this method does nothing.
Also according to HTML5 specification:
The `clear()` method must do nothing.
References:
- https://developer.mozilla.org/en-US/docs/DOM/document.clear
- http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#dom-document-clear
Problem
I have code in html like this ``` <html> <script type="text/javascript" src='LatihanKuisJs.js'></script> <body> <form name="kuis"> <table border="1" width="50%"> <tr> <th colspan="2" >Celcius </tr> <tr> <td align="center" width="80%">Kelvin</td> <td align="center"><input type="text" id="kelvin"> </td> </tr> <tr> <td align="center" width="80%">Reamur</td> <td align="center"><input type="text" id="reamur"></td> </tr> <tr> <td align="center" width="80%">Fahrenheit</td> <td align="center"><input type="text" id="fahrenheit"></td> </tr> </table> <input type="button" value="Calculate" onclick='calculateCelcius();'/> <br/><br/> <textarea rows="20" cols="90" id="textarea"> </textarea> <br/><br/> <input type="button" value="Clear" onclick='clear();'/> </form> </body> </html> ``` and external javascript function like this: ``` function calculateCelcius(){ var kelvin = document.getElementById('kelvin'); var reamur = document.getElementById('reamur'); var fahrenheit = document.getElementById('fahrenheit'); var textarea = document.getElementById('textarea'); var hasil=(kelvin.value*1 + reamur.value*1 + fahrenheit.value*1); textarea.value += hasil + '\n'; } function clear(){ document.getElementById("textarea").value=""; } ``` When I tried to click the clear button on my page, the text area wasn't clear. What's wrong? And what should I do?