html5 - css3背景效果，不知道为什么没显示出来

Question

只是简单的写了一个ul
背景的写法是这样，但是用chrome发现居然背景这一栏被忽略了
效果也没有

不是说按道理会有那层阴影吗，但是什么都没出来

Answer 1

Try removing the backslash at the end of border

Answer 2

The measured background can be displayed.

First, you have to remove the border after .

If it still cannot be displayed, it may be that your browser does not support radial-gradient as a background.

Answer 3

radial-gradientHow about adding a prefix?
-webkit-radial-gradient