index.js

const fetchTweets = async (text) => {

    // fetch tweets from server
    // enviroment [string]: Base url to the express.js server app
    // text [string]: username of the tweets author
    // tweetsToSearch [number]: number of tweets (10, 20, 50 or 100)
    const result = await fetch(`${enviroment}/twits/${text}/${tweetsToSearch}`);
    const response = await result.json();

    return response.body;
}