The lastIndexOf() method of Array instances returns the last index at which a given element can be found in the array, or -1 if it is not present. The array is searched backwards, starting at fromIndex.

The reduceRight() method of Array instances applies a function against an accumulator and each value of the array (from right-to-left) to reduce it to a single value.

The Math.fround() static method returns the nearest 32-bit single precision float representation of a number.

The Math.asin() static method returns the inverse sine (in radians) of a number. That is,

The toLocaleDateString() method of Date instances returns a string with a language-sensitive representation of the date portion of this date in the local timezone. In implementations with Intl.DateTimeFormat API support, this method simply calls Intl.DateTimeFormat.

The BigInt64Array() constructor creates BigInt64Array objects. The contents are initialized to 0n.

The Uint16Array() constructor creates Uint16Array objects. The contents are initialized to 0.

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

The intercept attribute defines the intercept of the linear function of color component transfers when the type attribute is set to linear.

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