InfoQ Homepage JavaScript Content on InfoQ
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New Signals Proposal Seeks to Formalize Reactive Programming Primitives in JavaScript
The JavaScript language recently added the Signals proposal (currently in Stage 1) to the list of candidate features striving to improve the language. The Signals proposal seeks to provide common primitives primarily for framework maintainers to implement reactive programming patterns. It reflects input from authors/maintainers of Angular, Ember, MobX, Preact, Qwik, RxJS, Solid, Svelte, Vue.
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The Deno Team Releases JSR, a New JavaScript Package Registry
The Deno team recently beta released JSR, a new JavaScript registry that strives to better fit the current needs of modern development and unify a fragmented JavaScript ecosystem. In particular, JSR embraces ESM (JavaScript native modules), natively accepts TypeScript packages, and supports major JavaScript runtimes (e.g., Node, Deno, Bun, browsers, miscellaneous serverless environments).
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CO2.js Helps Developers Track Their Application’s Carbon Footprint
The Green Web Foundation published a new release of CO2.js, a JavaScript library that enables developers to access the Green Web API and estimate the carbon emissions associated with their apps, websites, and software. CO2.js supports developers who want to create a carbon budget for their site or include carbon footprint estimation in monitoring tools.
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Running PostgreSQL in the Browser with WebAssembly
With the recently released PGlite, a WASM build of Postgres that is packaged into a TypeScript client library, developers can run Postgres queries in the browser with no extra dependencies. PGlite is used for reactive, real-time, local-first apps.
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Rolldown, a Rollup-Compatible Rust-Based Bundler for JavaScript, is Now Open -Sourced
Rolldown is a new JavaScript bundler written in Rust for performance. Rolldown intends to be compatible with Rollup’s APIs and plugins. The Rolldown project is led by Evan You (creator of the Vue web framework) and is intended to become Vite’s next bundler.
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Phoenix LiveView Promises SPA-Like Interactivity for Real-Time Server-Rendered Apps
9 years after the Phoenix web framework was made generally available, Phoenix LiveView recently reached 1.0 (release candidate). LiveView allows developers to create rich, real-time server-rendered applications without writing JavaScript. LiveView relies on the Erlang virtual machine (BEAM) to scale to millions of WebSocket connections handled by multiple processes concurrently.
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Expedia Speeds up Flights Search with Micro Frontends and GraphQL Optimizations
Expedia made flight search faster by up to 52% (page usable time) by applying a range of optimizations to web and mobile applications. To support these improvements, the company improved the observability of its applications. Expedia Flights web application has been migrated to Micro Frontend Architecture (MFA) to allow flexibility, reusability, and better optimization.
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AdonisJS v6 Released: TypeScript, ESM, and beyond
AdonisJS, a Node.js web application framework, has released its latest major release AdonisJS v6. Notable highlights include a transition to ECMAScript Modules (ESM), an improved and simplified IoC container, improved TypeScript integration, and a more straightforward approach to route and controller binding.
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Deno 1.40 Released, Features Upcoming JavaScript’s Temporal API and Decorators
The Deno team recently released Deno 1.40. Deno 1.40 implements upcoming JavaScript’s Temporal API for advanced date and time operations; and the latest JavaScript’s decorator proposal for meta- and aspect-oriented programming.
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Major Browser Vendors Announce Interop 2024 to Solve Incompatibility Issues
Browser makers Apple, Google, Microsoft, and Mozilla, alongside consultancies Bocoup and Igalia, recently announced Interop 2024, a project to promote web browser interoperability. Interop 2024 includes 17 focus areas addressing layout, styling, user interaction concerns, and more.
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Bun Announces Cross-Platform Shell Scripting in JavaScript and TypeScript
Bun recently announced the release of Bun Shell, offering JavaScript and TypeScript developers a cross-platform shell. This release aims to simplify the execution of shell scripts in JavaScript and TypeScript, providing a bash-like environment with features such as globbing, environment variables, redirection, and piping. The release is alpha quality and may undergo breaking changes in the future.
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AWS Introduces an Experimental Low Latency Runtime for Faster, More Efficient Serverless Apps
AWS recently open-sourced its JavaScript runtime, called LLRT (Low Latency Runtime), an experimental, lightweight JavaScript runtime designed to address the growing demand for fast and efficient Serverless applications.
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Netflix Announces SafeTest, Its Custom Approach to Front-End Testing
Moshe Kolodny recently introduced SafeTest, described as a novel approach to front-end web testing. SafeTest orchestrates a test runner, a browser automation library, a UI framework, and dependency injection capabilities to alleviate the pain points of traditional UI testing methods. SafeTest is currently used at Netflix.
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How Continuous Mobile Development Can Benefit from Test Automation
Test automation can support continuous mobile software development by reducing manual testing efforts, minimizing human errors, and accelerating the release cycle. Burak Ergören shared his experiences from automating their mobile testing at QA Challenge Accepted 2023.
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2023 JavaScript Rising Stars
The recent report from Rising Stars highlights the trends in the JavaScript ecosystem and showcases standout projects based on GitHub Stars in 2023. Overall, the most popular project was shadcn/ui, a collection of UI components that can be used to create custom components. The JavaScript runtime Bun continued its momentum, making it the second most popular project.