| <html> |
| <head> |
| <link rel="help" href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"> |
| <script src="../../resources/js-test.js"></script> |
| </head> |
| <body> |
| <div id="div"></div> |
| <script> |
| description("This test checks that EventHandler attributes only accept JS functions as input."); |
| |
| var div = document.getElementById("div"); |
| var callbackCount = 0; |
| |
| function callback() { |
| ++callbackCount; |
| } |
| |
| function dispatchKeyEvent() |
| { |
| var event = new KeyboardEvent('keydown', { bubbles: true, cancelable: true, view: null, key: 'Enter' }); |
| div.dispatchEvent(event); |
| } |
| |
| // Input is a JS function, this should work. |
| shouldBeNull('div.onkeydown'); |
| shouldNotThrow('div.onkeydown = callback'); |
| shouldBe('div.onkeydown', 'callback'); |
| shouldBe('callbackCount', '0'); |
| dispatchKeyEvent(); |
| shouldBe('callbackCount', '1'); |
| |
| // Non callable input should be treated as null. |
| var o = { handleEvent: callback }; |
| shouldNotBe('div.onkeydown', 'null'); |
| shouldNotThrow('div.onkeydown = o'); |
| shouldBe('div.onkeydown', 'o'); |
| dispatchKeyEvent(); |
| shouldBe('callbackCount', '1'); |
| |
| // Test non-object assignment. |
| shouldNotThrow('div.onkeydown = callback'); |
| shouldBe('div.onkeydown', 'callback'); |
| shouldNotThrow('div.onkeydown = "non-object"'); |
| shouldBeNull('div.onkeydown'); |
| |
| // Test null assignment. |
| shouldNotThrow('div.onkeydown = callback'); |
| shouldBe('div.onkeydown', 'callback'); |
| shouldNotThrow('div.onkeydown = null'); |
| shouldBeNull('div.onkeydown'); |
| </script> |
| </body> |
| </html> |
