CategoryJavaScript

May 23, 2019 — In Kristofer’s previous article, he explained how the basic parts of a validation library can be implemented. While the next part will focus on improving the developer experience, today’s article will focus on adding more features to what was created in Part 1. Kristofer will continue implementing the validation library you started implementing in the previous part of this series. These are the features that are going to take us from a simple proof of concept to an actual usable library! Read more…

May 21, 2019 — Do websites created with reactive frameworks get indexed by Google and other search engines? Is it compulsory to set up pre-rendering, as your SEO consultants suggest? Or are they wrong? In this article, Paolo Mioni will talk mostly about Vue.js, since it is the framework he’s used most, and with which he has direct experiences in terms of indexing by the search engines on major projects, but most of what will be covered is valid for other frameworks, too. Read more…

May 16, 2019 — Ever wondered how validation libraries work? In this article, Kristofer Giltvedt Selbekk will tell you how to build your very own validation library for React step by step. You will go through the process step by step, and you’ll find CodeSandbox examples as we go along. By the end of this post, you will know how to write your own validation library, or at the very least have a deeper understanding of how other libraries implement “the magic of validation”. The next part will add some more advanced features, and the final part will focus on improving the developer experience. Read more…

May 15, 2019 — When designing interfaces for IoT web page, one always has many options. In the previous part of this article, Richard Leddy shed light on the meaning of IoT and how Vue.js can be used to hosts groups of IoT human-machine interfaces. Today, Richard Leddy will take a closer look at lazy-loading panels and how to keep the Vue state in sync with devices. More about the editing process may be considered in some other discussion. There is a lot to it. But, for now, we have the tools we need in order to load hierarchal components and make them come alive. Read more…

May 8, 2019 — IoT is growing to include many devices with many owners. Web developers will be faced with the problem of finding ways to enable owners to interact with their devices. But, this problem gives rise to a great deal of business. In this article, Richard Leddy will explore some aspects of web page development for the Internet of Things (IoT) that are already in demand. This discussion delves into the interface requirements using Vue.js as a catalyst and illustrates one method of webpage to device communication out of many subsitutions. Read more…

May 6, 2019 — In this article, you’ll learn how you can progressively replace your JavaScript-driven lazy loading with its native alternative — thanks to hybrid lazy loading. Read more…

April 26, 2019 — DOM changes can be frequent, and as a result, there are instances where your app might need to respond to a specific change to the DOM. Monitoring for changes to the DOM is sometimes needed in complex web apps and frameworks. By means of explanations along with interactive demos, Louis Lazaris will show you how you can use the MutationObserver API to make observing for DOM changes relatively easy. Read more…

April 23, 2019 — Currently, with WordPress supporting Markdown, the format has become even more widely used. In this article, Sameer Borate will show you how to use Node.js and the Express framework to create an API endpoint. The context in which we will be learning this is by building an application that converts Markdown syntax to HTML. Along the way, you will also add authentication to your API endpoint, and you will also find ways to test your application endpoint using Postman. Read more…

April 9, 2019 — Exploiting a security flaw is often about getting multiple small pieces to line up. Every bit of JavaScript you add to a site is a potential way in for a hacker. This is doubly true if that JavaScript is hosted by someone else, such as on a public CDN. Subresource Integrity is a browser feature you can use to make sure that the code being used is exactly what you intended. In this article, Drew McLellan will take a look at what SRI is, how it can help protect you, and how you can start using it in your own projects, not just for files hosted on CDNs. Read more…

April 5, 2019 — WebAssembly is a new language that runs in the browser alongside JavaScript. In this article, Robert Aboukhalil explores how you can speed up web applications by replacing slow JavaScript calculations with compiled WebAssembly. This is a case study on using WebAssembly to speed up a data analysis web tool. To that end, Robert will take an existing tool written in C that performs the same computations, compile it to WebAssembly, and use it to replace slow JavaScript calculations. Read more…