The numOctaves attribute defines the number of octaves for the noise function of the <feTurbulence> primitive.

The for...of statement executes a loop that operates on a sequence of values sourced from an iterable object. Iterable objects include instances of built-ins such as Array, String, TypedArray, Map, Set, NodeList (and other DOM collections), as well as the arguments object, generators produced by generator functions, and user-defined iterables.

The preserveAspectRatio attribute indicates how an element with a viewBox providing a given aspect ratio must fit into a viewport with a different aspect ratio.

The fx attribute defines the x-axis coordinate of the focal point for a radial gradient.

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

The with statement extends the scope chain for a statement.

The flood-color attribute indicates what color to use to flood the current filter primitive subregion.

The division assignment (/=) operator performs division on the two operands and assigns the result to the left operand.

The multiplication (*) operator produces the product of the operands.