Columngap 一开始是 Multicolumn 布局 下的特有属性,后来在其他布局中也使用这个属性。 如 CSS 盒子对齐中的表述In the above column layout example, A gap of px will be added between flex children items as I have added fxLayoutGap as px fxLayoutGap column CSS fxLayoutGap row wrap If we are using wrap with fxLayout to wrap the the flex children items inside row or column layout, we should consider fxLayoutGap sizes when adding the flex item sizes for Since the columngap property is set to normal, the column gap will depend upon the browser Use the prefix webkit for browser support from Chrome, Safari and Opera, and moz for support from Firefox If the gap between the columns is increased while keeping the number of columns constant, then the column width will decrease Working With Column Gaps Analogwp Column gap in bootstrap