javascript - QQ browser and uc browser do not support css3 animation, but the built-in browsers of qq and WeChat support it

Question

A very simple effect, the drop-down list arrow rotates

Code
There is no problem opening the built-in browsers of QQ and WeChat, and there is no problem with the native browser of the mobile phone (Xiaomi 5splus). But the qq browser and uc will not open when opened

漂亮男人 · Answer

Try adding prefixes to keyframes