The "CSS" column indicates in which CSS version the function is defined (CSS1, CSS2, or CSS3).
|attr()||Returns the value of an attribute of the selected element||2|
|calc()||Allows you to perform calculations to determine CSS property values||3|
|linear-gradient()||Creates an "image" which represents a linear gradient of colors||3|
|radial-gradient()||Creates an "image" which represents a gradient of colors radiating from the center of the gradient||3|
|repeating-linear-gradient()||Creates an "image" consisting of repeating gradients||3|
|repeating-radial-gradient()||Similarly to radial-gradient(), but it automatically repeats the color stops infinitely in both directions||3|