javascript make element resizalbe code example

Example 1: resizing div js

<!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">
  <style>
  #resizable { width: 150px; height: 150px; padding: 0.5em; }
  #resizable h3 { text-align: center; margin: 0; }
  </style>
  <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">
  <h3 class="ui-widget-header">Resizable</h3>
</div>
 
 
</body>
</html>

Example 2: js resize div with mouse

bottom-right:  new_width = element_original_width + (mouseX - original_mouseX)  new_height = element_original_height + (mouseY - original_mouseY)bottom-left:  new_width = element_original_width - (mouseX - original_mouseX)  new_height = element_original_height + (mouseY - original_mouseY)  new_x = element_original_x - (mouseX - original_mouseX)top-right:  new_width = element_original_width + (mouseX - original_mouseX)  new_height = element_original_height - (mouseY - original_mouseY)  new_y = element_original_y + (mouseY - original_mouseY)top-left:  new_width = element_original_width - (mouseX - original_mouseX)  new_height = element_original_height - (mouseY - original_mouseY)  new_x = element_original_x + (mouseX - original_mouseX)  new_y = element_original_y + (mouseY - original_mouseY)

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