Split empty string should return empty array

Question

If I use

''.split(',')

I get [''] instead of an empty array [].

How do I make sure that an empty string always returns me an empty array?

Answer 1

Just do a simple check if the string is falsy before calling split:

function returnArr(str){
  return !str ? [] : str.split(',')
}

returnArr('1,2,3')
// ['1','2','3']
returnArr('')
//[]