Function Generator Example 1

script.js

//create a new generator function called takeOff
function* takeOff(){
  yield "Three";
  yield "Two";
  yield "One";
  yield "Space Craft taking off....."
}
//assign takeOff to a funtion expression named countDown
const countDown = takeOff();

//iterate the countDown function until you get an object with 'done:true' as a key/value pair
console.log(countDown.next()); //-> {value: "Three", done: false}
console.log(countDown.next()); //-> {value: "Two", done: false}
console.log(countDown.next()); //-> {value: "One", done: false}
console.log(countDown.next()); //-> {value: "Space Craft taking off.....", done: false}
console.log(countDown.next()); //-> {value: undefined, done: true}