The mask-sizeCSS property specifies the sizes of the mask images. The size of the image can be fully or partially constrained in order to preserve its intrinsic ratio.
The mask-repeatCSS property defines how mask images are repeated. A mask image can be repeated along the horizontal axis, the vertical axis, both axes, or not repeated at all.
The -webkit-mask-composite property specifies the manner in which multiple mask images applied to the same element are composited with one another. Mask images are composited in the opposite order that they are declared with the -webkit-mask-image property.
The mask property in CSS allows users to alter the visibility of an item by either partially or fully hiding it. This is accomplished by either masking or clipping the image at specific points.