Converting plain JavaScript objects to strings results in '[object Object]'. This string representation isn’t helpful when debugging issues or looking for details. You can print details for an object when using a JSON string. But you don’t always want to print an object in a JSON …

In some situations, you need the number of days within a month. For example, when displaying statistics for each day of a month or when calculating a value with the unit “per day”. This tutorial shows you how to retrieve the number of days in a month using JavaScript. {{outline} …

Working with dates in an application requires you to think of time zones. Users are going to access your application from different time zones. They expect displayed dates to either match their personal timezone or to contain the timezone information, a la UTC+02:00. A common approach to handling …

One of our projects is a point of sale (POS) application. This POS is a web app and served in a fullscreen browser on a tablet. We can get an overview of the POS with the help of a dashboard. The dashboard displays information about sales and the tablet itself, …

Browsers become powerful when it comes to interacting with the user’s system. For example, the Battery API allows you to retrieve information about the system’s battery charge level. You may check whether a device is charging and has enough energy. This tutorial shows you how to retrieve the …

Tailwind CSS provides the h-screen utility class that makes an element take up 100vh of the user’s display. A downside is that there are no sibling classes with more granular vertical spaces, like 50vh, 33vh, or 25vh. This tutorial shows you how to use any view height utility class …

One of our projects serves thousands of users every day. The users are non-technical and have all sorts of technical devices. The devices may be old and outdated, but they’re still used. We need to ensure the website works on such devices too. All major browsers support localStorage. It’ …

We’re using MySQL as the relational data store in most of our projects. MySQL is a solid foundation, even with complex data types, like JSON. Sometimes we’re integrating apps with external APIs. We typically store responses from external services when requesting from them or synchronizing data with them. …