Forked from mathiasbynens/ios-viewport-scaling-bug-fix-original.js
Created
October 27, 2011 12:29
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Improved version of JavaScript fix for the iOS viewport scaling bug. See http://www.blog.highub.com/mobile-2/a-fix-for-iphone-viewport-scale-bug/
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| // Original code from http://www.blog.highub.com/mobile-2/a-fix-for-iphone-viewport-scale-bug/ | |
| var metas = document.getElementsByTagName('meta'); | |
| var i; | |
| if (navigator.userAgent.match(/iPhone/i)) { | |
| for (i=0; i<metas.length; i++) { | |
| if (metas[i].name == "viewport") { | |
| metas[i].content = "width=device-width, minimum-scale=1.0, maximum-scale=1.0"; | |
| } | |
| } | |
| document.getElementsByTagName('body')[0].addEventListener("gesturestart", gestureStart, false); | |
| } | |
| function gestureStart() { | |
| for (i=0; i<metas.length; i++) { | |
| if (metas[i].name == "viewport") { | |
| metas[i].content = "width=device-width, minimum-scale=0.25, maximum-scale=1.6"; | |
| } | |
| } | |
| } |
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| // My rewritten version | |
| (function(doc) { | |
| var metas = doc.querySelectorAll('meta[name="viewport"]'), | |
| forEach = [].forEach; | |
| function fixMetas(isFirstTime) { | |
| var scales = isFirstTime ? ['1.0', '1.0'] : ['0.25', '1.6']; | |
| forEach.call(metas, function(el) { | |
| el.content = 'width=device-width,minimum-scale=' + scales[0] + ',maximum-scale=' + scales[1]; | |
| }); | |
| } | |
| fixMetas(true); | |
| doc.body.addEventListener('gesturestart', fixMetas, false); | |
| }(document)); |
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