<!DOCTYPE html> <html> <head> <script> // Notify parent of our final URI: window.parent.postMessage(window.location.href, "*"); </script> <style> html, body { margin: 0; height: 100%; } svg { display: block; height: 100%; } </style> </head> <body> <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1"> <defs> <rect id="limeRect" width="100%" height="100%" fill="lime"/> </defs> <rect width="100%" height="100%" fill="red"/> <use xlink:href="#limeRect"/> </svg> </body> </html>