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December 14, 2015 10:49
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SWF swallows any JavaScript key events while it's focused. This demo illustrates how to make key events always work while SWF exists on page.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>SWF & JavaScript Key Event</title> | |
| <style> | |
| #focusable-link { | |
| position: absolute; | |
| left: -1000em; | |
| top: -1000em; | |
| } | |
| #logger { | |
| font-size: 11px; | |
| font-family: Verdana; | |
| position: absolute; | |
| left: 450px; | |
| top: 100px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>SWF and JavaScript Key Event</h1> | |
| <div id="demo"></div> | |
| <ul id="logger"></ul> | |
| <script src="http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js"></script> | |
| <script> | |
| var attrs = {}, | |
| linkEl, | |
| params = {}; | |
| // Uses SWFObject Renders Player. | |
| // It makes sure you won't have a duplicated ID. | |
| attrs.id = "player"; // Defines player's ID. | |
| params.allowScriptAccess = "always"; // Needed to allow player to call functions. | |
| swfobject.embedSWF( | |
| "https://www.youtube.com/v/Zhawgd0REhA?enablejsapi=1&playerapiid=ytplayer&version=3", | |
| "demo", "425", "356", "8", null, null, params, attrs | |
| ); | |
| // Injects an invisible link as a focus target. | |
| linkEl = document.createElement("a") ; | |
| linkEl.href = "javascript:void(0);"; | |
| linkEl.setAttribute("id", "focusable-link"); | |
| document.body.appendChild(linkEl); | |
| // Shows all key events. | |
| document.onkeyup = function (e) { | |
| e = e || window.event; | |
| var item = document.createElement("li"); | |
| item.innerHTML = "keyup event, keyCode = " + e.keyCode; | |
| document.getElementById("logger").appendChild(item) | |
| }; | |
| // Always makes sure user can't focus on the SWF. | |
| setTimeout(function () { | |
| if (document.getElementById("player") === document.activeElement) { | |
| document.getElementById("focusable-link").focus(); | |
| } | |
| setTimeout(arguments.callee, 100); | |
| }, 100); | |
| </script> | |
| </body> | |
| </html> |
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It also causes keyboard shortcuts fails.