It uses require and module.exports as shown here: // Importing modulesĬonst somePackage = require('./somePackage') Ĭonst anotherPackage = require('./anotherPackage') Common JS is the original and default module system of Node.js. However they work in very different ways. What is the different between Common JS and ES6 Modules?Ĭommon JS and ES6 modules are very similar in their syntax. To make a variable or function public, the `export` feature is used. There is no need for `use strict` as everything is already in strict mode. Now with ES6 modules, we can import packages and files into one main script without any need to check the ordering of imports (within reason) and we know immediately if a package has not been loaded correctly.Įverything inside an ES6 module is private by default. And the only way to make sure is launch the website and check everything works correctly. We can only assume that the scripts that we need have been loaded. The second is that we are unsure of our dependencies. In the above example you can see that JQuery and the random-util have been loaded first so that app.js has access to them. Third party scripts and any utility function files have to be loaded first to make sure that any script that requires the functions have access to them. The first is that the namespace gets polluted with global variables. To use a function from another file, that file would need to be already loaded within the DOM like so: Īlthough this isn’t necessarily “bad”, there are a couple of flaws in this approach. In the past it was not possible to directly reference one JavaScript file in another.

What are ES6 Modules?ĮS6 modules are JavaScript modules that are used to import and export functions, objects, or primitive values from one file to another.

It means that any variables or functions declared in the module won’t be added automatically to the global scope. In this post, we’re going to give you a beginner’s guide to using ES6 modules.Īn ES6 module is a piece of JavaScript code that executes in strict mode only. If you’re not familiar with them, they essentially allow you to better organize your code and keep things clean and modular. ES6 Modules are a relatively new concept in the JavaScript world that have been gaining traction lately.

What is es6 javascript