Number.EPSILON

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

Number.EPSILON is the difference between 1 and the next greater number representable in the Number format, because double precision floating point format only has 52 bits to represent the mantissa, and the lowest bit has a significance of 2-52.

Note that the absolute accuracy of floating numbers decreases as the number gets larger, because the exponent grows while the mantissa’s accuracy stays the same. Number.MIN_VALUE is the smallest representable positive number, which is much smaller than Number.EPSILON.