Add Number.prototype.padStart/padEnd

padStart or padEnd are often used with numbers

so you have to do one of

String(num).padStart(n, c)
`${num}`.padStart(n, c) 

It would be easier if this method is ported to numbers as well

There is also a 3rd option of num.toString().padStart(n, c).

For more control over formatting numbers this is also Intl.NumberFormat:

45..toLocaleString(“en-us”, {minimumIntegerDigits: 6 });
> 000,045