Number is negative zero
JavaScript, Math · Oct 20, 2020

Checks if the given value is equal to negative zero (-0
).
- Check whether a passed value is equal to
0
and if1
divided by the value equals-Infinity
.
const isNegativeZero = val => val === 0 && 1 / val === -Infinity;
isNegativeZero(-0); // true
isNegativeZero(0); // false