Node.js

Node has been implementing more and more ES6+ (ESNext) features natively. One of the features that is taking the longest to implement is modules. The reason for this is that Node and npm run on what is called CommonJS, with which you use require('module-name') to import from othe ...

This post goes through some patterns that can be used to unit test ES6 classes. The examples will use Jest module auto-mocking but should be portable to other module mocking libraries (eg. Proxyquire) with some modifications. In “Using ES6 classes for Sequelize 4 models&rdq ...

An email sending example. ...

An example consuming a GraphQL API in JavaScript from Node and the browser using graphql.js See the example live: https://example.codewithhugo.com/js-graphql-client-example/. Full repo: https://github.com/HugoDF/js-graphql-client-example. ...

Parcel allows us to bundle frontend applications with no configuration and GitHub pages affords us a way to deploy them for free. Here’s how to use these two tools together to deploy a JavaScript application. Full example of a repo deployed like this: https://github.com/Hug ...

There always comes a point in a web application’s life where an operation is best served in the background, this is where queues come in. There are a few queuing solutions in Node. None of them are ridiculously dominant, eg. Kue, RSMQ, Bee Queue, bull. The issue with Kue, R ...

When using docker-compose, it’s good practice to make anything that relies on Postgres wait for it to be up before launching. This avoids connection issues inside the app. This post walks through how to deliver this functionality both as a CLI and a module that works both as a Co ...

Testing is a crucial part of the software development process. It helps to catch bugs, avoid regressions and to document the behaviour of a piece of software. Express is one of the most widespread libraries for building backend applications in JavaScript. What follows is a summar ...

Channel your inner Sindre Sohrus and ship a beautifully simple CLI app using Node. Command line apps are a neat way to package repetitive tasks. This will walk you through some tools that are useful to build CLI apps. ...

Redis and Express are tools that provide a simple and clean approach to their problem domains. What follows is a Docker/Docker Compose v2 setup. The repo is available at: https://github.com/HugoDF/express-redis-docker. The docker-compose.yml is available at: github.com/HugoDF/exp ...