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JS Iterables

// Create an Object
myNumbers = {};

// Make it Iterable
myNumbers[Symbol.iterator] = function() {
  let n = 0;
  done = false;
  return {
    next() {
      n += 10;
      if (n == 100) {done = true}
      return {value:n, done:done};
    }
  };
}

// Create an Iterator
let iterator = myNumbers[Symbol.iterator]();

let text = ""
while (true) {
  const result = iterator.next();
  if (result.done) break;
  text += result.value +"<br>";
}

document.getElementById("demo").innerHTML = text;