This step will guide you through creating your first Node.js module. If you need more information on this, read our guide on How To Use the Node.js REPL. It will also help to be comfortable with the Node.js REPL (Read-Evaluate-Print-Loop).To gain this experience, follow How To Use Node.js Modules with npm and package.json, particularly the Step 1 - Creating a package.json File. You should also be familiar with the package.json file, and experience with npm commands would be useful as well.By having Node.js installed you will also have npm installed this tutorial uses version 6.11.3. To install this on macOS or Ubuntu 18.04, follow the steps in How To Install Node.js and Create a Local Development Environment on macOS or the Installing Using a PPA section of How To Install Node.js on Ubuntu 18.04. You will need Node.js and npm installed on your development environment.Afterwards, you will run through various ways of importing a module into a Node.js application. You will develop the module by storing the colors as an array, and providing a function to retrieve one randomly. In this tutorial, you will create a Node.js module that suggests what color web developers should use in their designs. This makes creating modules an essential skill for a Node.js developer. Being able to write modules that export useful functions and data will allow you to contribute to the wider Node.js community-in fact, all packages that you use on npm were bundled and shared as modules. Describing a piece of code as a module refers less to what the code is and more to what it does-any Node.js file or collection of files can be considered a module if its functions and data are made usable to external programs.īecause modules provide units of functionality that can be reused in many larger programs, they enable you to create loosely coupled applications that scale with complexity, and open the door for you to share your code with other developers. In Node.js, a module is a collection of JavaScript functions and objects that can be used by external applications. The author selected the Open Internet/Free Speech Fund to receive a donation as part of the Write for DOnations program.
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