CSS 蒙版**CSS 遮罩**模块定义了遮罩和裁剪,用于部分或完全隐藏视觉元素的部分。参考属性 clip clip-path clip-rule mask mask-border mask-border-mode mask-border-outset mask-border-repeat mask-border-slice mask-border-source mask-border-width mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size mask-type 规范规范CSS 遮罩模块级别 1