ElementaryUI is a framework designed to run declarative Swift applications natively in a web browser by leveraging WebAssembly (Wasm). It provides a developer experience modeled after SwiftUI, offering a familiar and intuitive syntax for building web user interfaces. The framework includes built-in reactivity through property wrappers like @State, @Environment, and @Reactive, which automate state management for the UI. To streamline the development process, it utilizes a Vite-powered environment that supports a fast development server with hot reloading for rapid iteration.
The framework is designed to run declarative Swift applications natively in a web browser by leveraging WebAssembly (Wasm).
Technically, the framework distinguishes itself by utilizing Embedded Swift to produce small, kilobyte-sized Wasm bundles. It also features a CSS-based animation system that includes automatic FLIP (First, Last, Invert, Play) transitions. According to the project's author, the framework was initially born from a personal challenge to use Swift across all platforms, but it offers a practical benefit by allowing developers to stay within a modern, clean, and powerful language and tooling environment for web projects. The author notes that while the framework is currently listed in JS framework benchmarks, it is designed to be "fast enough" for most use cases.
Despite its capabilities, the project faces specific technical hurdles and community considerations. The author acknowledges that bundle size remains a weak spot and that proper bundling and splitting of Wasm modules still need to be "willed into existence." Community discussion around the project highlights the trade-offs of using Swift, with some users comparing its developer experience to Haskell while others expressed concerns regarding the speed of the Swift compiler. Additionally, some observers noted the potential risks of relying on a language heavily associated with Apple's ecosystem, though the primary goal remains providing a comfortable way to build web projects using Swift's modern features.