Creating promises in Node.js or JavaScript is a common way to run an asynchronous task. There’s a gotcha that you need to be aware of: the global Promise object provides a constructor that requires an executor function. The promise executor is a function accepting two other functions: resolve …

Merging objects in JavaScript is a common task. For example, when starting an application you may load multiple configuration files and merge them into a single configuration object. This tutorial shows you how to merge objects in JavaScript. {{outline}} Merge Objects Merging objects in JavaScript is possible in different ways. …

When building tools that work with dates, you may want to provide a button that acts as a shortcut to increase a date by one week. Internally, your application still works with actual dates and you may want to calculate the date in one week. This tutorial shows you how …

Imagine a planning tool like a ToDo-list where you want to schedule a task due for tomorrow. Clicking a button “plan for tomorrow“ sets the due date to tomorrow. Your database still needs an actual date as the deadline. This tutorial shows you how to retrieve tomorrow’s date in …

When preparing a package release, you may want to preview the upcoming release locally. The NPM CLI has a handy command to create a tarball locally: {{outline}} Create a Local Release Package Running the npm pack command in a directory containing a package.json file will create a .tar.gz …

The release of GitHub Actions opened up opportunities around testing. Testing your code in GitHub is now doable using Docker-based actions. When running your tests, you may need a database dependency, like Redis. This tutorial shows you how to use Redis when testing your code. You’ll also see how …

GitHub Actions provide powerful automation, like running tests for your codebase. Keeping your continuous integration pipeline close to your code is a sweet setup. Typically, an application requires a database dependency. If you’re in the need for MongoDB when using GitHub Actions, this tutorial is for you! {{outline}} Use …