Array.map()

A map is a method of array in javascript thats create a new array with same length of original array by making aloop in array indexes .

Array.reduce()

A reduce is method of array in javascript thats reduce the array of one value .

superagent()

SuperAgent is light-weight progressive ajax API crafted for flexibility, readability, and a low learning curve after being frustrated with many of the existing request APIs. It also works with Node.js!

.then()

The then() method returns a Promise. It takes up to two arguments: callback functions for the success and failure cases of the Promise.

async/await function

An async function is a function declared with the async keyword, and the await keyword is permitted within them. The async and await keywords enable asynchronous, promise-based behavior to be written in a cleaner style, avoiding the need to explicitly configure promise chains.