Javascript. Correctly convert -0 to a string

Question

x = -0
>> -0
typeof(x)
>> "number"
x.toString()
>> "0"
console.log(x)
>> -0

How can I convert Javascript's -0 (number zero with the sign bit set rather than clear) to a two character string ("-0") in the same way that console.log does before displaying it?

Answer 1

If Node.js (or npm available¹) util.inspect will do that:

> util.inspect(-0)
'-0'

If not, you can make a function:

const numberToString = x =>
    Object.is(x, -0) ?
        '-0' :
        String(x);

Substitute the condition with x === 0 && 1 / x === -Infinity if you don’t have Object.is.

_{¹ I haven’t read this package’s source and it could be updated in the future anyway; look at it before installing!}