jasdeepkhalsa
/ fif.js
Created
March 12, 2013 09:59
Friendly iFrames (FIF) - Loading JavaScript Asynchronously Without Blocking window.onload by Stoyan Stefanov. Designed for loading third party scripts only (for first party scripts this script may have a negative performance impact, as tested by Yahoo)
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| // Documented by Stoyan Stefanov: https://www.facebook.com/note.php?note_id=10151176218703920 | |
| (function() { | |
| var url = 'http://example.org/js.js'; | |
| var iframe = document.createElement('iframe'); | |
| (iframe.frameElement || iframe).style.cssText = | |
| "width: 0; height: 0; border: 0"; | |
| iframe.src = "javascript:false"; | |
| var where = document.getElementsByTagName('script')[0]; | |
| where.parentNode.insertBefore(iframe, where); | |
| var doc = iframe.contentWindow.document; |