Generally speaking, a function is a "subprogram" that can be called by code external (or internal, in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function as parameters, and the function will return a value.

The rest parameter syntax allows a function to accept an indefinite number of arguments as an array, providing a way to represent variadic functions in JavaScript.

The overflow attribute sets what to do when an element's content is too big to fit in its block formatting context. This feature is not widely implemented yet.

Asserts that two expressions are equal to each other.

Redundant constants module for the `u32` primitive type.

Indicates unfinished code.

Trait for comparisons using the equality operator.

The order attribute indicates the size of the matrix to be used by a <feConvolveMatrix> element.

Cast between types, or rename an import.

The points attribute defines a list of points. Each point is defined by a pair of number representing a X and a Y coordinate in the user coordinate system. If the attribute contains an odd number of coordinates, the last one will be ignored.