Rob Gravelle

If your application(s) include date and time information, there’s a good chance that you’ll have to deal with time zones. In a nutshell, that requires adding or subtracting hours to a DateTime value to express it in another time zone. Sounds simple enough on the surface. However, in practice, it’s incredibly daunting. Not only do […]

In addition to first-party libraries, such as Angular Material, most enterprise-level Angular applications make use of dozens of third-party dependencies. These handy reusable libraries are published as npm packages that are ready to be integrated into your applications via the Angular CLI. Reusable code is a great thing, but there are downsides. One of the […]

Angular and React are two of the most popular JavaScript frameworks for web development. Each espouses its own philosophy and boasts proponents who swear by one or the other. The goal of this series is not to promote either framework, but to provide an honest evaluation of each framework’s strengths and weaknesses to better equip […]

Whether you’re a novice or an experienced web application developer, you’re almost certainly going to have to make a choice between Angular or React at some point. To do that, you merely need to answer a few simple questions: “Is it a good tool?”, “Can it do what I need it do do?”, and “Is […]

In this series on RESTful Web services, we’ve been learning how to implement both a RESTful Web Service and client component using Node.js, Express.js, and JavaScript. The first three installments focused mainly on the server-side Web Services code. Now it’s time to shift our attention to the client-side of the equation, i.e., the consumer of […]

This series on RESTful Web services covers how to implement both a RESTful Web Service and client component using Node.js, Express.js, and JavaScript. In the Creating Your First Web Service tutorial, we learned how to set up a basic Web service using Node.js and the Express framework. In Part 2, we adapted our web server […]

Welcome to part 2 of this series on RESTful Web Services! In part 1 we set up a basic Web service using Node.js and the Express framework. In this tutorial we’ll learn what makes a service RESTful by adapting our Web server that we built in part 1 to handle different request types. REST Service […]

Some developers consider themselves to be server-side specialists, while others focus most of their efforts on client-side coding. The departments of IT shops often reflect those tendencies. However, that need not be the case. Thanks to the emergence of technologies like Node.js, you can write both the server and client components using essentially the same […]

Infinite Scrolling the Angular 6 and RxJS Way! An infinite-scroll-list is one that loads content asynchronously when the user scrolls down to a certain point in the viewport. It’s a lot more fluid than having the user click on a “Load More” button to see more items. Here‘s an example. You can write a scroll […]

One of the most important DOM operations is tree traversal. It’s one that is made more complicated by the wide range of possible node types — there are Text, Element, Comment and other special nodes, such as ProcessingInstruction or DocumentType. Most of them won’t have any childNodes, and then there are some which carry only a single […]

Once upon a time, event handlers were bound to HTML elements using an inline “on[action]” attribute. It was not a great implementation for several reasons. First, it was not dynamic. It was also limited to one and only one handler. Yuck! Today, we can bind numerous handlers to the same element event at any time. […]

Cross-Origin Resource Sharing (CORS) is a mechanism which allows clients and servers to communicate even if they are not on the same domain. Since it was accepted as a W3C Recommendation back in January 2014, developers have indicated that CORS is not as simple as specifying the appropriate server URL. There are a lot of […]