CSS 转换在 webkit 中有效，但在 FF 中无效
我有一个下拉菜单的代码，在子菜单上有一个过渡：
ul.menu ul {
-moz-transition: visibility 0s linear .55s, opacity .55s linear 0s;
-webkit-transition: visibility 0s linear .55s, opacity .55s linear 0s;
-o-transition: visibility 0s linear .55s, opacity .55s linear 0s;
transition: visibility 0s linear .55s, opacity .55s linear 0s;
visibility: hidden;
opacity: 0;}
ul.menu li:hover > ul {
-moz-transition-delay:0s;
-o-transition-delay:0s;
-webkit-transition-delay:0s;
transition-delay:0s;
visibility: visible;
opacity: 1; }
它在 Chrome 中正确显示，但在 Firefox (7.0.1) 中不正确：为什么？ 另一个改变另一个元素背景颜色的过渡效果很好，并且类似的过渡（www.greywyvern.com/?post=337 归功于这个想法！）在 FF 中也同样有效。
I have this code for a drop-down menu, with a transition on the sub-menu:
ul.menu ul {
-moz-transition: visibility 0s linear .55s, opacity .55s linear 0s;
-webkit-transition: visibility 0s linear .55s, opacity .55s linear 0s;
-o-transition: visibility 0s linear .55s, opacity .55s linear 0s;
transition: visibility 0s linear .55s, opacity .55s linear 0s;
visibility: hidden;
opacity: 0;}
ul.menu li:hover > ul {
-moz-transition-delay:0s;
-o-transition-delay:0s;
-webkit-transition-delay:0s;
transition-delay:0s;
visibility: visible;
opacity: 1; }
It displays properly in Chrome but not in Firefox (7.0.1): why?
Another transition changing background-color on another elemet works fine and a similar transition (www.greywyvern.com/?post=337 credit for the idea!) works as well in FF.
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由于这是一个 CSS3 函数，我认为它在 Firefox 中仍然无法使用。查看此页面底部的兼容性表...尝试升级您的浏览器或使用过渡的替代方案。
Since this is a CSS3 function, I assume it's still not a working feature in Firefox. Take a look at the compatibility table on the bottom of this page... Try upgrading your browser or work with an alternative of transitions.
您有太多计时声明：
如果删除最后一个计时
0s，它将按预期工作。请参阅此处，其中包含您的代码以及上次删除的时间。
You have too many timing declarations:
If you remove the last timing
0sit will work as expected.See here, with your code and with the last time removed.