In design, reflections are stylized mirror images of objects. Even though they are not as popular as shadows, they have their moments — just think about the first time you explored the different font formats in MS Word or PowerPoint: …
maskproperty in CSS allows you to hide parts of an element. For example, if you have a black and white image, you can apply that as a mask and the black parts will force the element to be transparent on that elements. Masks can also match the alpha transparency of the mask image.
Chris Coyier on (Updated on )