Conteneditable is an attribute of HTML element to edit the content, you can easily edit the content.
Example:
HTML:
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<table border="1">
<tr>
<td contenteditable='true'>HTML</td>
<td>RUN</td>
</tr>
</table>
</body>
</html>
OUTPUT
