What is the difference between these functions in Javascript

I would like to know which is the difference between these expressions:

case a:

const functionA = () => {
   executeA(), executeB()
}

case b:

const functionA = () => {
  executeA();
  executeB();
}

>Solution :

They do exactly the same thing, but the first one is weird and the second one is the normal way of writing code.
Don’t use the first version.