event-handler-handleEvent-ignored.html (1073B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>"handleEvent" property of EventHandler should be ignored</title> 4 <link rel="help" href="https://html.spec.whatwg.org/#eventhandler"> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <div id="log"></div> 8 <script> 9 "use strict"; 10 11 test(t => { 12 const handler = Object.create(null, { 13 handleEvent: { 14 get: t.unreached_func('"handleEvent" property should not be looked up'), 15 }, 16 }); 17 18 const el = document.createElement("div"); 19 el.onmouseenter = handler; 20 el.dispatchEvent(new MouseEvent("mouseenter")); 21 }, 'plain object "mouseenter" handler'); 22 23 async_test(t => { 24 const handler = Object.create(Function.prototype, { 25 handleEvent: { 26 get: t.unreached_func('"handleEvent" property should not be looked up'), 27 }, 28 }); 29 assert_true(handler instanceof Function); 30 31 window.onmessage = handler; 32 window.postMessage({}, "*"); 33 34 step_timeout(() => { 35 t.done(); 36 }, 50); 37 }, 'non-callable "message" handler that is instance of Function'); 38 </script>