How do I use yield in JavaScript?

How do I use yield in JavaScript?

The yield keyword is used in generator functions to pause execution and return a value. Would you like an example?

Yes, please provide an example of a generator function using yield.

Sure! Here's a simple example:

function* generatorFunction() {
    yield 1;
    yield 2;
    yield 3;
}

const gen = generatorFunction();
console.log(gen.next().value); // 1
console.log(gen.next().value); // 2
console.log(gen.next().value); // 3

This function yields values one at a time when called.

What happens if I call next() after all values are yielded?

If you call next() after all values have been yielded, it will return an object with value: undefined and done: true, indicating that the generator is finished.