opacity错误
Error: Undefined mixin 'opacity'. on line 22 of E:\css\Untitled-2.scss, in `opacity' from line 22 of E:\css\Untitled-2.scss Use --trace for backtrace. 什么错误
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Error: Undefined mixin 'opacity'. on line 22 of E:\css\Untitled-2.scss, in `opacity' from line 22 of E:\css\Untitled-2.scss Use --trace for backtrace. 什么错误
2016-08-07
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