Applications of generator and promise?

Question

JavaScript

Good day.
I study JS and apply it in practice.
I know separately what a generator is and how it works, there are a lot of articles on this topic and everything is described in detail.
I know what promises are.
The question is how do they work together, where in practice do you need to put these yield or where to return the state of the promise?
Point to a good source or write a couple of examples.

Answer 1

https://developer.mozilla.org/en/docs/Web/JavaScript...

Answer 2

read the ES6 Generators In Brief section

Answer 3

I indulged in my time with generators for the frontend. even put it in production. and forgot about it. forever and ever. thing of dubious necessity. well, without promises , it will
return 4 anywhere in a second

function getPromise() {
  return new Promise((resolve,fail)=> {
    // что либо асинхронное
    setTimeout(()=>resolve(4),1e3)
  })
}

getPromise().then((d)=>console.log(d))

someone will object that generators can and should sequentially resolve several asynchronous requests. for this there is Promise.all

Promise.all([
            httpFactory.get(`reward/${idReward}/view`)
                .then(d=> {
                    this.reward = d.data;
                    this.term = dictFactory.termsDelivery[this.reward.delivery_rules].name;
                    this.reward.date = handleDataFactory.getIntervalDate(this.reward.send_date_from,this.reward.send_date_to);
                    // осталось наград
                    // sell_count == 0 это бесконечность наград
                    this.amountRewD=this.reward.sell_count-(this.reward.collected_count || 0)
                }),
            httpFactory.getAuth()
                .then(d=> {
                    // возвращает 'no' если нет регистрации или она устарела
                    //  под логином возвращает число денег на счету начиная от 0
                    this.isAuth = d.data;//===false? false:d.data;
                    // если фронт под логинон а сервер нет, то
                    if (this.isAuth == 'no' && authFront) userFactory._reLogin(true);
                })
        ]).then(d=> {
            this.getAmountRewD()
        });

Answer 4

Good article with examples
https://habrahabr.ru/post/182620/