In his article, Alex MacArthur explores JavaScript generator functions, which have been part of the language since ES2015 but remain underutilized. He delves into the iterator and iterable protocols that underpin generators, providing clear examples to illustrate their mechanics. MacArthur shares his personal journey of experimenting with generators, highlighting their advantages in scenarios like on-demand value generation and infinite sequences. He concludes that, while not universally applicable, generators offer ergonomic benefits and a compelling mental model for certain use cases.