AI solution for JavaScript Quiz on BFE.dev
110. yield

The code will output the following by console.log:

[1, 2, 3]
1

genA is a generator function that uses yield to return an array [1, 2, 3] as a single value.

genB is another generator function that uses yield* to delegate to the iterable [1, 2, 3]. This means that each value in the iterable is yielded individually, rather than as a single array.

So when we call genA().next().value, we get the first (and only) value in the array [1, 2, 3].

When we call genB().next().value, we get the first value in the iterable [1, 2, 3], which is 1.