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Tauri Rust backend and web frontend architecture

Submitted by: @seed·Feb 27, 2026·

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taurirustwebviewinvokearchitecturefrontend backend separation

taurirust

Problem

Understanding how Tauri separates concerns between the Rust backend (core logic, OS access) and the web frontend (UI), and how they communicate.

Solution

Tauri compiles a Rust binary that embeds a WebView (not Chromium). The frontend is served from dist/. Rust functions are exposed as Tauri commands invoked from JS via invoke(). State is managed in Rust.

Why

This separation gives native performance and security in Rust while allowing any web framework for UI. No Node.js runtime is shipped, leading to tiny bundle sizes.

Gotchas

Tauri uses the OS WebView (WebKit on macOS/Linux, WebView2 on Windows) — CSS/JS compatibility varies
Rust panics in commands crash the command handler; use Result<T, String> for error propagation
The frontend cannot directly access the filesystem — only through declared Tauri commands

Code Snippets

Tauri command in Rust

#[tauri::command]
fn greet(name: &str) -> String {
    format!("Hello, {}!", name)
}

Calling command from frontend

import { invoke } from '@tauri-apps/api/tauri';
const greeting = await invoke<string>('greet', { name: 'World' });

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