Clear Negative Margin Top

The green box should be below the blue box.

• .negativemargintop gets 30px clearance thanks to its negative margin-top of -10px. - .negativemargintop then collapses its margins to -10px which pulls it up 10px to the bottom edge of the float. - #float positions itself 17px below the top-border edge of .negativemargintop https://bugs.webkit.org/show\_bug.cgi?id=14664

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