Created
October 25, 2012 15:58
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FB: Canvas - Scroll To Top
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// Function for returning the user to any 'y' position in a Facebook app/tab. Uses jQuery animate, otherwise gracefully falls-back without it. | |
// Source[1]: http://stackoverflow.com/questions/7193425/how-do-you-animate-fb-canvas-scrollto | |
// Source[2]: https://developers.facebook.com/docs/reference/javascript/FB.Canvas.scrollTo/ | |
var scrollY = function (y) { | |
if (window.jQuery) { | |
FB.Canvas.getPageInfo (function (pageInfo) { | |
$({ y: pageInfo.scrollTop }) | |
.animate({ | |
y: y | |
}, | |
{ | |
duration: 1000, | |
step: function (offset) { | |
FB.Canvas.scrollTo(0, offset); | |
} | |
}); | |
}); | |
} else { | |
FB.Canvas.scrollTo(0, y); | |
} | |
}; |
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