The Date() constructor creates Date objects. When called as a function, it returns a string representing the current time.

The then() method of Promise instances takes up to two arguments: callback functions for the fulfilled and rejected cases of the Promise. It stores the callbacks within the promise it is called on and immediately returns another Promise object, allowing you to chain calls to other promise methods.

The Number.parseInt() static method parses a string argument and returns an integer of the specified radix or base.

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 Math.hypot() static method returns the square root of the sum of squares of its arguments. That is,

The toPrecision() method of Number values returns a string representing this number to the specified number of significant digits.

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

The Math.atan() static method returns the inverse tangent (in radians) of a number, that is

The Math.sign() static method returns 1 or -1, indicating the sign of the number passed as argument. If the input is 0 or -0, it will be returned as-is.

The Math.cosh() static method returns the hyperbolic cosine of a number. That is,