Introduction to Modules
Modules are reusable pieces of code that can be imported and exported between different files. This promotes code organization, maintainability, and code reuse. ES6 introduced a standardized module system, which can be used with the import
and export
statements.
Exporting from a Module
Importing into a Module
Destructuring Assignment
Destructuring assignment is a concise syntax for extracting values from arrays or properties from objects and assigning them to variables.
Spread and Rest Operators
The spread operator (...
) allows you to spread the elements of an iterable (like an array) into individual elements, while the rest operator collects multiple elements into an array.
Template Literals
Template literals are a new way of creating strings in ES6. They allow for string interpolation and multi-line strings without the need for concatenation.
Promises and Async/Await
Promises are objects that represent the eventual completion (or failure) of an asynchronous operation and its resulting value. The async/await
syntax provides a more readable way to work with Promises.
In the next chapter, we'll take a look at popular JavaScript libraries and frameworks, as well as testing frameworks.