webdevelopment
By Paul Krill Svelte 5, a planned update to the reactive UI framework, has reached the release candidate phase. No breaking changes are anticipated between now and the stable release. The release candidate was announced on April 30. It features a rewrite of Svelte to be faster, easier to use, and more robust. Runes, a signal-powered reactivity API, is a highlight of this release. Runes promises to unlock universal, fine-grained reactivity, the Svelte team said. Other highlights in Svelte 5 include: Components written for Svelte 4 will continue to work, with several exceptions. Components are n...
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By Paul Krill Along with releasing Python specialists, Google also has laid off Flutter and Dart teams according to various reports. Google did not respond this morning to InfoWorld's inquiry about Flutter and Dart layoffs. But comments were circulating online about staff reductions at Google. Flutter is an open source framework for building multi-platform applications from a single codebase. Dart, a language leveraged by Flutter, was once positioned as a rival to JavaScript. Google pledged to unveil updates to Flutter at the Google I/O conference in two weeks. With the reduction of staff for ...
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By Paul Krill Userware has released OpenSilver 2.2, an update to the company’s open-source replacement for Microsoft’s Silverlight rich internet application framework. This release lets legacy Visual Studio LightSwitch applications run on modern browsers via a compatibility pack. OpenSilver 2.2 and the LightSwitch Compatibility Pack were announced April 30. Developers can download OpenSilver 2.2 and sign up for a trial of LightSwitch Compatibility Pack. With the Userware updates, Lightswitch applications can be ported without rewriting them. Discontinuation of the Silverlight plugin, which pow...
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By Paul Krill React 19, the latest version of Meta’s JavaScript library for rendering user interfaces, is now available in beta. The update introduces features such as async functions in transitions and the ability to access ref as a prop for function components. The React 19 beta was unveiled April 25. A React 19 beta upgrade guide has been published. React 19 adds support for using async functions in transitions to handle pending states, forms, errors, and optimistic updates automatically. Functions that use async transitions are called Actions. By building on top of Actions, React 19 introd...
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By Paul Krill WebAssembly runtime maker Wasmer has unveiled py2wasm, a Python-to-WebAssembly compiler that transforms Python programs to the WebAssembly (aka Wasm) binary instruction format. Using a fork of the Nuitka Python compiler, py2wasm converts Python programs to Wasm, allowing them to run without interpreter overhead. Introduced April 18, py2wasm addresses a situation in which the performance of Python programs in WebAssembly has been less than ideal, Wasmer founder and CEO Syrus Akbary wrote in a blog post. Akbary said that py2wasm gets about 70% of native Python speed, and is about 2...
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By Serdar Yegulalp WebAssembly was originally designed to give in-browser web applications a way to run portable, sandboxed, high-performance binaries. As WASM matures beyond the browser, new uses for the technology are emerging. Using WASM to build programmability and extensibility into applications is one use case that is gathering steam. The Extism software library lets you write programs that can interface with extensions written in WebAssembly. Extism handles the data and function-calling interface between code written in your host application and the WASM extensions. This lets you focus ...
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By Matthew Tyson Promises are a central mechanism for handling asynchronous code in JavaScript. You will find them in many JavaScript libraries and frameworks, where they're used to manage the results of an action. The fetch() API is one example of promises at work. As a developer, you might not be familiar with creating and using promises outside of an existing product, but it's surprisingly simple. Learning how to create promises will help you understand how libraries use them. It also puts a powerful asynchronous programming mechanism at your disposal. Asynchronous programming with promises...
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By Serdar Yegulalp A common problem with Python applications is how to share them with other people. Developers frequently use a web interface to solve this issue, presenting the app's functionality by way of a UI. But that solution works best when the application UI is a natural fit for web components. Data exploration apps can work like this, for instance, but they also require front-end components written in JavaScript for ideal interactivity. Streamlit is a Python library that aims to solve many of these issues at once. Using Streamlit, developers can create Python apps with web-based fron...
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By Joydip Kanjilal A high-quality application must be stable, performant, scalable, and reliable. The reliability of an application depends on many factors, but one of the most important is resiliency, or the ability to withstand failures or faults during run time. In this article, we’ll see how we can bring resiliency to database connections in ASP.NET Core using Entity Framework Core. EF Core has a feature called connection resiliency that automatically retries failed database commands to maintain connectivity during transient errors or network instability. By encapsulating the logic for ide...
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By Matthew Tyson In the first half of this article, we set up a web development stack and created a simple example application using Bun, HTMX, Elysia, and MongoDB. Here, we'll continue exploring our new stack while cleaning up and abstracting the example application's data access layer and adding more complex HTMX interactions. We'll also add another component to the tech stack: Pug, a popular JavaScript template engine that works well with HTMX and helps with configuring DOM interactions. The example applicationOur example application currently consists of a form and a table. The form lets u...
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