split an empty string gives an element

Question

why split on an empty string gives an element?

i.e. how to get 0 in the below case:

let tags = "";
let arr = tags.split(',');
console.log(arr.length);

Answer 1

You can simply remove the empty string elements form arr using filter

let tags = "";
let arr = tags.split(',').filter(x => x);
console.log(arr.length);