你所不知道的「補白」 首先,你必須要知道這幾個常用屬性的可用值, 屬性 預設值 可用值 justify-content normal flex-start,flex-end,center,space-between,space-around align-content normal flex-start,flex-end,center,space-between,space-around align-items stretch flex-start,flex-end,center,baseline,stretch align-self auto auto,flex-start,flex-end,