Sorting numbers in descending order but with `0`s at the start

You could sort by the delta of b and a (for descending sorting) and take Number.MAX_VALUE, for falsy values like zero.

This:

Number.MAX_VALUE - Number.MAX_VALUE

is equal to zero.

let array = [0, 1, 0, 2, 0, 3, 0, 4, 0, 5];

array.sort((a, b) => (b || Number.MAX_VALUE) - (a || Number.MAX_VALUE));

console.log(...array);