Resisable box

HTML

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>jQuery UI Resizable - Default functionality</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <link rel="stylesheet" href="/resources/demos/style.css">
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
  <script>
  $( function() {
    $( "#resizable" ).resizable();
  } );
  </script>
</head>
<body>
<div id="resizable" class="ui-widget-content center-center">
  <h3 class="ui-widget-header">Resizable</h3>
</div>
</body>
</html>

<!-- Reference link https://jqueryui.com/resizable/ -->

CSS

* {
    margin: 0;
    padding: 0;
    box-sizing:border-box;
  }
  #resizable { 
    display:flex;
    justify-content:center;
    align-items:center;
    width: 150px; 
    height: 150px; 
    min-width:100px;
    min-height:100px;
  }

  #resizable h3 {
    display:flex;
    justify-content:center;
    align-items:center;
    height: 100px;
    width: 100px;
    text-align:center;
  }