Summary

In this chapter, we learned about variable scopes, read-only variables, splitting arrays into individual values, passing indefinite parameters to a function, extracting data from objects and arrays, arrow functions, and new syntaxes for creating object properties, hoisting, IIFE, semicolon usage, and more.
In the next chapter, we will learn about built-in objects and symbols, and we will discover tons of fundamental tools JavaScript natively provides us with out-of-the-box.