The Map.groupBy() static method groups the elements of a given iterable using the values returned by a provided callback function. The final returned Map uses the unique values from the test function as keys, which can be used to get the array of elements in each group.

The Number.EPSILON static data property represents the difference between 1 and the smallest floating point number greater than 1.

The Math.cbrt() static method returns the cube root of a number. That is

The Math.log() static method returns the natural logarithm (base e) of a number. That is

The Math.min() static method returns the smallest of the numbers given as input parameters, or Infinity if there are no parameters.

The Math.max() static method returns the largest of the numbers given as input parameters, or -Infinity if there are no parameters.

The toFixed() method of Number values formats this number using fixed-point notation.

The Math.random() static method returns a floating-point, pseudo-random number that's greater than or equal to 0 and less than 1, with approximately uniform distribution over that range — which you can then scale to your desired range. The implementation selects the initial seed to the random number generation algorithm; it cannot be chosen or reset by the user.

The Math.imul() static method returns the result of the C-like 32-bit multiplication of the two parameters.

The getUTCMinutes() method of Date instances returns the minutes for this date according to universal time.