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December 30, 2012 at 7:38 pm
yes, that is indeed what its doing andy. the catch is your background needs to be a solid color and match the color of the mask.
chris, i’m not sure why the codepen demo is not working in IE, but check it out in the original author’s jsfiddle demo: http://jsfiddle.net/rjzaworski/dpetM/3/
looking good to me on ie8, 9 and 10.
i remember when i used it i didnt have any issues with IE, and this was when i was still testing for ie7.