The unicodeSets accessor property of RegExp instances returns whether or not the v flag is used with this regular expression.

The findIndex() method of TypedArray instances returns the index of the first element in a typed array that satisfies the provided testing function. If no elements satisfy the testing function, -1 is returned. This method has the same algorithm as Array.prototype.findIndex().

The reduce() method of TypedArray instances executes a user-supplied "reducer" callback function on each element of the typed array, in order, passing in the return value from the calculation on the preceding element. The final result of running the reducer across all elements of the typed array is a single value. This method has the same algorithm as Array.prototype.reduce().

The indexOf() method of TypedArray instances returns the first index at which a given element can be found in the typed array, or -1 if it is not present. This method has the same algorithm as Array.prototype.indexOf().

The keys() method of TypedArray instances returns a new array iterator object that contains the keys for each index in the typed array. This method has the same algorithm as Array.prototype.keys().

The RegExp.leftContext static accessor property returns the substring preceding the most recent match. RegExp["$`"] is an alias for this property.

The RegExp.lastParen static accessor property returns the last parenthesized substring match, if any. RegExp["$+"] is an alias for this property.

The source accessor property of RegExp instances returns a string containing the source text of this regular expression, without the two forward slashes on both sides or any flags.

The format() method of Intl.NumberFormat instances formats a number according to the locale and formatting options of this Intl.NumberFormat object.

The Array.of() static method creates a new Array instance from a variable number of arguments, regardless of number or type of the arguments.