SwiftUI with support for WebAssembly

Carson Katri

Last update: Dec 11, 2022

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Overview

SwiftWebUI and WASM

This is a fork of the incredible SwiftWebUI to support WebAssembly via swiftwasm.

What does it do?

This repo allows you to run your SwiftUI projects completely on the web.

import SwiftWebUI

SwiftWebUI.serve(Text("Hello, world!"))

The code is compiled to WebAssembly, and run entirely in the browser.

This is not a static site generator. By compiling Swift code to WASM, we can create stateful webapps entirely in Swift:

How is it different from the main SwiftWebUI?

SwiftWebUI runs a Swift NIO server which handles the changes. With that approach, every time an action is made on the client, the server has to run the operations and send down the changes to the DOM.

This repo removes the need for a server by compiling the code to run in the browser itself. This allows for more flexible and efficient apps.

Get Started

To create a new SwiftWebUI and WASM project, you can run:

npx carson-katri/swiftwebui-scripts create MyApp

For more information on swiftwebui-scripts, view the repo.

Helpful Packages

swiftwebui-router

A simple Router for SwiftWebUI
JavaScriptKit

Swift framework to interact with JavaScript through WebAssembly

Examples

Firebase Cloud Functions

Contributing

You can build the project with the following command:

swift build --triple wasm32-unknown-wasi

Comments

invalid Darwin version number: macos11.1

my-app % make
cd MyApp && \
	swift build --triple wasm32-unknown-wasi && \
	cp .build/debug/MyApp ../dist/SwiftWASM.wasm && \
	wasm-strip ../dist/SwiftWASM.wasm && \
	gzip ../dist/SwiftWASM.wasm --best
/Users/az/swift/src/github.com/felicitaspublica/my-app/MyApp: error: manifest parse error(s):
<unknown>:0: error: invalid Darwin version number: macos11.1
<unknown>:0: error: invalid version number in '-target x86_64-apple-macos11.1'
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/System/Library/Frameworks/Combine.framework/Modules/Combine.swiftmodule/x86_64-apple-macos.swiftinterface:1:1: error: failed to build module 'Combine' from its module interface; the compiler that produced it, 'Apple Swift version 5.3.1 (swiftlang-1200.2.41 clang-1200.0.32.8)', may have used features that aren't supported by this compiler, 'Swift version 5.3-dev (LLVM b978bd2044, Swift 6b21aa1cfd)'
// swift-interface-format-version: 1.0
^
<unknown>:0: error: invalid Darwin version number: macos11.1
<unknown>:0: error: invalid version number in '-target x86_64-apple-macos11.1'
make: *** [build] Error 1

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