homework/hw17-generators/script.js

const delay = ms => new Promise(ok => setTimeout(() => ok(ms), ms))

function* likeAsync() {
    console.log(1)
    console.log(yield 1.5)
    let res1 = yield delay(2000)
    console.log(2, res1)
    let res2 = yield delay(2000)
    console.log(3, res2)
    try {
        console.log(yield fetch("htpsdasd://localhost:10000"))
    } catch (e) {
        console.log('GENA ERROR CATCH', e)
    }
    let res3 = yield delay(3000)
    console.log(4, res3)
}

let likeA = likeAsync()

console.log(likeA.next())
console.log(likeA.next().value.then(res => console.log(res)))

function run(gena) {
    let iter = gena()
    function next(res, err) {
        let value, done
        try {
            if(!err) {
                //литеральная деструктуризация???
                [{value, done}] = [iter.next(res)]
            } else {
                [{value, done}] = [iter.throw(err)]
            }
            if (done) return;
            if(value && typeof value?.then === 'function') {
                value.then(next, err => next(undefined, err))
            } else if (value){
                next(value)
            }
        } catch(e) {
            console.warn('gena error', e)
        }
    }
    next()
}