CSS相關

flex主要屬性

.Flex {
  flex-direction : row | row-reverse | column | column-reverse;
  flex-wrap : nowrap | wrap | wrap-reverse;
  flex-flow : <flex-direction> <flex-wrap>;
  justify-content : flex-start | flex-end | center | space-between | space-around;
  align-items : flex-start | flex-end | center | baseline | stretch;
  align-content : flex-start | flex-end | center | space-between | space-around | stretch;
}