css - Why are in IE >= 9 using border-radius:[value] fixed child Elements clipped?

Question

If I use css border-radius:[some value] for a parent element and have a fixed positioned child element, in Internet Explorer the child element gets 'clipped' into the parent. If I use border-radius:0 in the parent element, the result is ok (but without a border radius).

This is IE >= 9 only. Other browsers behave like expected.

Here's a jsfiddle showing what I mean.

Answer 1

我认为这与它处理溢出的方式有关。如果您完全删除了溢出属性，IE9 会将这些工具提示视为体面的浏览器。