Async UI: A Rust UI Library Where Everything is a Future

In plain words

Async UI is a Rust user interface library designed for developers building applications with asynchronous programming. It treats all UI elements as futures, enabling a functional approach to building interfaces. The library integrates Rust's async/await system directly into UI development, allowing developers to write reactive components naturally. It is intended for Rust programmers who want to leverage async patterns in their user interface code.

written from the facts on this page · September 2026

From the sources

This blog post is intended for readers with some experiences in async Rust. It assumes you know what a Future is! Async UI is a proof-of-concept Rust UI library with backends for the web (HTML/JS) and GTK 4. UI widgets are retained : they run some code, stay there and wait for some events (such as user interactions), and then run some more code to handle those events. Sync Rust cannot handle the stay there and wait for some events step in a clean way. Widgets can live for arbitrarily long, and sync Rust lifetimes cannot express that. Async Rust solves this problem: in async functions, lifetimes can span across await points, and await points may pause for however long we want. This allows us…from wishawa.github.io

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