Implementation of a for-each loop in JavaScript that works with callbacks. The next iteration in the loop does not start until the previous iteration's callback gets called.

for-each-with-promise.js

// request method implementation is in a GitHub Gist linked below
const array = [1, 2, 3, 4, 5];

array.forEachWithCallback((el, i, next) => {
    request({
        method: 'GET',
        hostname: 'httpbin.org',
        path: '/get?myArg=' + el
    }).then((res) => {
        const responseBody = JSON.parse(res.body);
        console.log(responseBody.args.myArg);
        next();
    }).catch((err) => {
        console.error(err);
    });
});

https://gist.github.com/lmzach09/38d291edb90f64d338132824a9de35ce