JS Practice — Built-in Objects

Symbol.iterator — custom iterable object

📖 Usage Example

const range = {
  [Symbol.iterator]: function*() {
    yield 1
    yield 2
  }
}
[...range]   // → [1, 2]

Any object can become iterable by defining a [Symbol.iterator] generator method.

Custom Iterable via Symbol.iterator

You can make any object iterable by defining a [Symbol.iterator] generator method.

Challenge: Spread a custom iterable that yields 1, 2.

💡 Hints (1)