Stylelint is a powerful style sheet linter. It brings clarity to code and saves you from errors. It’s useful for everyone. Once you start using it, you will hear no more comments like, “You forgot to remove it there.” in this article, Aleks Hudochenkov will show you why linting a style sheet matters, how stylelint brings order to a style sheet and how we can avoid errors. Happy developing, and may you have a peaceful code review.
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Dependencies are everywhere. They’re unavoidable. They aren’t inherently bad, but if you don’t consider the possibility a given dependency might not be met, you run the risk of frustrating your users. Reducing dependencies improves the likelihood that your site will be usable by the greatest number of people in the widest variety of scenarios. Even knowing this, however, it’s easy to overlook the most basic dependencies our projects have, undermining their resilience in the process. To illustrate this point, consider the humble submit button.
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In this part of the tutorial Nash Vail will start by replacing the photographer’s name with the actual wallpaper image along with proper credits. During this process you’ll learn how to link a library in Xcode, as well as more on general styling and positioning of UI elements. You will learn how to save pictures to the Camera Roll and also how to run your app on a physical device. To apply all your newly learned React Native skills there is a challenge waiting for you at the end. Just like the first part, this article has five sections. Completing each section takes us a step closer to finishing our app.
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Imagine a web component distributed as a single .js file and containing everything. We would still have our basic style sheets, but the dynamic CSS would be a part of JavaScript. Now this is possible, and one way to achieve it is with CSSX. Similar to JSX, CSSX offers encapsulation. Being able to see all parts of a single component is a big step forward. The separation of concerns defined development for years, but the web is changing. Understanding what is going on is easier when everything is in one place.
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These frameworks and the whole idea of building mobile apps with JavaScript never appealed to me, though. I always thought, why not just learn Swift/Objective-C or Java and build real apps? That definitely requires a significant amount of learning, but isn’t that what we developers do and should be good at? Quickly learn new languages and frameworks? What’s the point, then? For me, the advantages never outweighed the doubts.
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Finding little techniques and tricks to help you get to results faster can immensely improve your productivity, so you don’t have to waste time on solutions that will never see the light of day. Vitaly Friedman loves finding those little useful front-end goodies that make our lives easier. Since technologies emerge and evolve permanently, keeping track on what’s going on is often difficult, especially since specifications change and so does the browser support.
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What is that preload? What does it do? And how can it help you? Preload gives developers the ability to define custom loading logic without suffering the performance penalty that script-based resource loaders incur. In human terms, it’s a way to tell a browser to start fetching a certain resource, because you as authors know that the browser is going to need that particular resource pretty soon.
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It’s possible to make visually impressive augmented reality projects using just open source libraries. In this tutorial, Martin Sikora will make use of OpenCV in Python to detect circle-shaped objects in a webcam stream and replace them with 3D Earth in Three.js in a browser window while using WebSockets to join this all together. His core idea behind this demo was to use tools that are common on the web and don’t require any prerequisites so anyone can start using them right away. That’s why Martin wanted to use just circle detection and not pattern matching, which would require to print or have some particular real-world object.
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In this article, James Miller and Mate Marschalko cover the basics of how to get started building for your own IoT devices using JavaScript. When building IoT devices, the task is typically divided between two roles: A hardware engineer creates the physical device, and a developer the ecosystem. However, this is not always necessary. In the case of JavaScript, its isomorphic nature allows for one language to be used across multiple platforms — including hardware. While the prospect of building your own hardware can be daunting, hopefully, after working through these two examples, you’ll be already thinking about the possibilities and planning your next project. Many components are compatible with the Johnny-Five library, meaning that the only limit is your imagination.
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Enter the amazing world of rational agents, supervised learning and unsupervised learning. Start developing algorithms that can solve daily life problems by simulating the thinking of the human mind. In this article, Arnaldo Perez Castano will describe an artificial intelligence by means of an A* search algorithm for the sliding tiles puzzle. You will be able to compete with friends and create artificial intelligences for this and many other puzzles and games!
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