ES6 - Yield and Return at the Same Time

Question

I have this,

function*(a){
 if (a) {
    yield API.callRoute();
    return;
  }
  // other stuff that is blocked by return
}

I want this:

function*(a){
  if (a) {
    return yield API.callRoute(); // one fewer line of code
  }
  //...
}

Doable? Why? Why not?

Answer 1

Yes, it's doable, but your second snippet return s the result of the yield expression. If you don't want that but make it exactly equivalent to your first snippet, use

return void yield API.callRoute();

though probably it's not worth making this a line shorter when the difference is significant.