– Foundations: https://exploringjs.com/impatient-js/ch_async-js.html
– Promises for async programming: https://exploringjs.com/impatient-js/ch_promises.html
– Async functions: https://exploringjs.com/impatient-js/ch_async-functions.html
– Async iteration: https://exploringjs.com/impatient-js/ch_async-iteration.html