css flexbox中縮寫屬性

flex-flow爲flex-direction與flex-wrap的縮寫

默認爲：flex-flow:row wrap;

flex屬性是flex-grow, flex-shrink 和 flex-basis的簡寫，默認值爲0 1 auto。後兩個屬性可選。

flex的詳情https://blog.csdn.net/fengyjch/article/details/79047908