Have you ever used Lodash or similar libraries?

Yes, Lodash is a popular JavaScript library that provides many convenient functions for working with arrays, objects, strings, and other data types. It is often used to simplify and improve the readability of code.

For example, Lodash makes tasks like deep copying objects, debouncing functions, filtering, and sorting data easier.

An example of using Lodash to filter an array of objects:

const _ = require('lodash');

const users = [
  { 'user': 'barney', 'age': 36, 'active': true },
  { 'user': 'fred',   'age': 40, 'active': false }
];

const activeUsers = _.filter(users, { 'active': true });
console.log(activeUsers);
// [{ user: 'barney', age: 36, active: true }]

Lodash alternatives include Underscore.js, Ramda, and other functional libraries, which can be used depending on project preferences and requirements.