<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>jQuery UI Resizable - Constrain resize area</title> <link rel="stylesheet" href="../../themes/base/all.css"> <link rel="stylesheet" href="../demos.css"> <style> #container { width: 300px; height: 300px; } #container h3 { text-align: center; margin: 0; margin-bottom: 10px; } #resizable { background-position: top left; width: 150px; height: 150px; } #resizable, #container { padding: 0.5em; } </style> <script src="../../external/requirejs/require.js"></script> <script src="../bootstrap.js"> $( "#resizable" ).resizable({ containment: "#container" }); </script> </head> <body> <div id="container" class="ui-widget-content"> <h3 class="ui-widget-header">Containment</h3> <div id="resizable" class="ui-state-active"> <h3 class="ui-widget-header">Resizable</h3> </div> </div> <div class="demo-description"> <p>Define the boundaries of the resizable area. Use the <code>containment</code> option to specify a parent DOM element or a jQuery selector, like 'document.'</p> </div> </body> </html>