JSFiddle - React, Tailwind, and code Playground

HTML

<div id="output"></div>

JavaScript

function getUserById(usersArr, userId, cb) {
    cb(usersArr.filter(function (el) {
        return el.id === userId;
    })[0]);
}

var users = [{
    id: '15a',
    name: 'bob',
    email: '[email protected]',
    address: '123 main'
}, {
    id: 'zxv',
    name: 'jim',
    email: '[email protected]',
    address: '234 main'
}];

getUserById(users, '15a', function (user) {
    document.getElementById('output').innerHTML = 'The user with the id 15a has the email of ' + user.email + ' the name of ' + user.name + ' and the address of ' + user.address;
});