The void operator evaluates the given expression and then returns undefined.

A block statement is used to group zero or more statements. The block is delimited by a pair of braces ("curly braces") and contains a list of zero or more statements and declarations.

The lang attribute specifies the primary language used in contents and attributes containing text content of particular elements.

The maskUnits attribute indicates which coordinate system to use for the geometry properties of the <mask> element.

The class declaration creates a binding of a new class to a given name.

A character escape represents a character that may not be able to be conveniently represented in its literal form.

The id attribute assigns a unique name to an element.

The max attribute specifies the maximum value of the active animation duration.

The nullish coalescing assignment (??=) operator, also known as the logical nullish assignment operator, only evaluates the right operand and assigns to the left if the left operand is nullish (null or undefined).

The Uint8Array typed array represents an array of 8-bit unsigned integers. The contents are initialized to 0 unless initialization data is explicitly provided. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).