<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=872812 --> <head> <title>Test for Bug 872812</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=872812">Mozilla Bug 872812</a> <p id="display"></p> <div id="content" style="display: none"></div> <iframe id="svg" src="viewport-helper.svg"></iframe> <pre id="test"> <script class="testbody" type="application/javascript"> var svg = document.createElementNS("http://www.w3.org/2000/svg", 'svg'); ok(svg, "SVG exists"); var a = document.createEvent('CustomEvent').initCustomEvent('', '', '', svg.viewBox); ok(true, "CustomEvent exists and we are not crashed!"); </script> </pre> </body> </html>