Get your own website Result Size: 625 x 565
x
 
<!DOCTYPE html>
<html>
<head>
<style> 
#myDIV {
  border: 1px solid black;
  background-color: lightblue;
  width: 270px;
  overflow: auto;
}
</style>
</head>
<body>
<h1>Change resize with JavaScript</h1>
<button onclick="myFunction()">Try it</button>
<div id="myDIV">
  <p>Click the "Try it" button, then click and drag the bottom right corner of this div element to resize.</p>
</div>
<script>
function myFunction() {
  document.getElementById("myDIV").style.resize = "both";
}
</script>
</body>
</html>