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Use any web browser as GUI, with Swift in the backend and modern web technologies in the frontend.

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webui-dev/swift-webui

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Swift-WebUI

Use any web browser or WebView as GUI.
With Swift in the backend and modern web technologies in the frontend.

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Features

  • Parent library written in pure C
  • Fully Independent (No need for any third-party runtimes)
  • Lightweight ~200 Kb & Small memory footprint
  • Fast binary communication protocol between WebUI and the browser (Instead of JSON)
  • Multi-platform & Multi-Browser
  • Using private profile for safety

Usage

Minimal Example

import SwiftWebUI

let doc = "<html><head><script src='webui.js'></script></head> Hello World</html>"

let win = newWindow()

try! win.show(doc)

wait()

Find more examples in the Examples/ directory.

After cloning the repository, examples can be run from the repository root.

git clone --recursive --shallow-submodules --filter=blob:none --also-filter-submodules \
  https://github.com/webui-dev/swift-webui.git
swift run CallSwiftFromJS

UI & Web Technologies

Borislav Stanimirov discusses using HTML5 in the web browser as GUI at the C++ Conference 2019 (YouTube).

CPPCon

Web application UI design is not just about how a product looks but how it works. Using web technologies in your UI makes your product modern and professional, And a well-designed web application will help you make a solid first impression on potential customers. Great web application design also assists you in nurturing leads and increasing conversions. In addition, it makes navigating and using your web app easier for your users.

Why Use Web Browsers?

Today's web browsers have everything a modern UI needs. Web browsers are very sophisticated and optimized. Therefore, using it as a GUI will be an excellent choice. While old legacy GUI lib is complex and outdated, a WebView-based app is still an option. However, a WebView needs a huge SDK to build and many dependencies to run, and it can only provide some features like a real web browser. That is why WebUI uses real web browsers to give you full features of comprehensive web technologies while keeping your software lightweight and portable.

How Does it Work?

Diagram

Think of WebUI like a WebView controller, but instead of embedding the WebView controller in your program, which makes the final program big in size, and non-portable as it needs the WebView runtimes. Instead, by using WebUI, you use a tiny static/dynamic library to run any installed web browser and use it as GUI, which makes your program small, fast, and portable. All it needs is a web browser.

Runtime Dependencies Comparison

WebView Qt WebUI
Runtime Dependencies on Windows WebView2 QtCore, QtGui, QtWidgets A Web Browser
Runtime Dependencies on Linux GTK3, WebKitGTK QtCore, QtGui, QtWidgets A Web Browser
Runtime Dependencies on macOS Cocoa, WebKit QtCore, QtGui, QtWidgets A Web Browser

Wrappers

Language Status Link
Go ✔️ Go-WebUI
Nim ✔️ Nim-WebUI
Pascal ✔️ Pascal-WebUI
Python ✔️ Python-WebUI
Rust not complete Rust-WebUI
TypeScript / JavaScript ✔️ Deno-WebUI
V ✔️ V-WebUI
Zig not complete Zig-WebUI

Supported Web Browsers

Browser Windows macOS Linux
Mozilla Firefox ✔️ ✔️ ✔️
Google Chrome ✔️ ✔️ ✔️
Microsoft Edge ✔️ ✔️ ✔️
Chromium ✔️ ✔️ ✔️
Yandex ✔️ ✔️ ✔️
Brave ✔️ ✔️ ✔️
Vivaldi ✔️ ✔️ ✔️
Epic ✔️ ✔️ not available
Apple Safari not available coming soon not available
Opera coming soon coming soon coming soon

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Use any web browser as GUI, with Swift in the backend and modern web technologies in the frontend.

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