frust

Frust is a Rust-native, mobile-first declarative UI framework: write one View tree in Rust and ship it to Android, iOS, macOS, Windows, Linux, and the web, rendered everywhere by the frust-owned frust-engine GPU pipeline.

frust is the facade crate. Application code depends on this single crate; it exposes run, the canonical app entry point, and curates the view, widget and reactive vocabulary from the underlying framework crates (frust-core, frust-widgets, frust-reactive, frust-theme and others).

Status: pre-1.0; APIs may change between minor versions.

Platforms

• Android and iOS
• macOS, Windows and Linux (desktop shells)
• Web (WebGPU, with a WebGL2 fallback)

Example

Add the dependency:

[dependencies]
frust = { package = "frust-ui", version = "0.5" }

The package is named frust-ui and imported as frust, because the crates.io name frust belongs to another project (https://github.com/lloydmeta/frunk/issues/258).

A counter-style component, as shown in the crate-level documentation:

use frust::{Component, View, AnyView, any, text};

struct Counter;

impl Component for Counter {
    type State = i32;

    fn init(&self) -> i32 {
        0
    }

    fn build(&self, state: &mut i32) -> AnyView<i32> {
        any(text(format!("count: {state}")).size(32.0))
    }
}

frust::run(Counter).unwrap();

Getting started

Install the command-line tool and create a project:

cargo install frust-cli
frust create my_app

frust create writes the dependency above into the new project.

Design systems ship as separate plugin crates that an application depends on beside frust; the facade itself carries only the baseline widget set.

Links

• Documentation: https://frust.dev
• Source: https://github.com/frust-rs/frust

License

Licensed under MIT OR Apache-2.0, at your option. See LICENSE-MIT and LICENSE-APACHE in this directory.