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.

The super keyword is used to access properties on an object literal or class's [[Prototype]], or invoke a superclass's constructor.

The yield operator is used to pause and resume a generator function.

The systemLanguage attribute represents a list of supported language tags. This list is matched against the language defined in the user preferences.

The targetY attribute determines the positioning in vertical direction of the convolution matrix relative to a given target pixel in the input image. The topmost row of the matrix is row number zero. The value must be such that: 0 <= targetY < order Y.

The JavaScript exception "duplicate formal argument x" or "duplicate argument names not allowed in this context" occurs when a function creates two or more parameter bindings with the same name, and the function is not a non-strict function with only simple parameters.

The refX attribute defines the x coordinate of an element's reference point.

The function* keyword can be used to define a generator function inside an expression.

The surfaceScale attribute represents the height of the surface for a light filter primitive.

The epochMilliseconds accessor property of Temporal.ZonedDateTime instances returns an integer representing the number of milliseconds elapsed since the Unix epoch (midnight at the beginning of January 1, 1970, UTC) to this instant. It is equivalent to dividing epochNanoseconds by 1e6 and flooring the result.