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The problem I still have with the modals is the scrolling behavior. Aside from taking over the scroll event, which I do Not want to do, it seems if I want a modal to scroll without the background scrolling, the only way is to put a 'overflow: hidden' on the body tag. Anybody have a more clever way of doing this?

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What's wrong with that CSS?

For one thing it hides the scrollbar which in some browsers causes the whole page to shift by a number of pixels. It's not the worst thing but it's a little bit distracting. My QA people recently sent me a bug that was basically this issue.

Exactly, and you can't simply set a left margin because the scrollbar width is different in every OS. This is what bootstrap does: https://github.com/twbs/bootstrap/blob/83bfff7f0765503b990b9...

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