promise_list.js

function generatePromiseFunc(index) {
    return function () {
        return new Promise((resolve, reject) => {
            setTimeout(() => {
                console.log(index)
                resolve(index)
            }, 1000)
        })
    }
}

const promise_list = []

for(let i = 0; i < 10; i++) {
    promise_list.push(generatePromiseFunc(i))
}