javascript return?

#help

function e(){
  return 4, false;
}

e() 
// e () -> false
function f() {
  return 4 + 4, true;
}
f()
// f() -> true

Shouldn't I expect it to return 4 or sum of 4 + 4. Why every time my function e() and function f() return 2nd value?

Top comments (5)

The comma operator (,) evaluates each of its operands (from left to right) and returns the value of the last operand.

Thank you. I actually got confused on left to right and right to left evaluate thing.

return only returns 1 value, and it vould be the last,
if you like to return more then 1 value you can do this as a array

function e() {
return [4,false];
}

if you then like to get first part just type
e()[0];

thank you it was really helpful. I saw this code in react, they had this long complex return with , so I thought what the use of it?

what's the desired behavior of these functions?