I'm trying to load and execute a WebAssembly .wasm from within a Swift-based, iOS app. I first attempted to use the JavaScriptCore Framework but the WebAssembly.* module wasn't available in the Context when I tried to evaluate a trivial script. I was able to confirm the WebAssembly isn't defined via the Safari Debugger Console.
I then attempted to use WKWebView because I'm led to believe that the lack of WebAssembly is due to JSC not supporting JIT, which WKWebView should. I got the same result.
Here's a trivial app running on an iPhone X 12.4 emulator, Xcode 10.3 and the WebKit Framework manually added to the project. Make sure to open Safari and Select "Developer>Simulator" for WKWebView debugger.
import UIKit
import WebKit
class ViewController: UIViewController {
@IBOutlet weak var webView: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
}
@IBAction func onClick(_ sender: UIButton) {
let testWasm = """
if(typeof WebAssembly !== 'undefined') {
console.log("Hello, Wasm.");
} else {
console.log("No Wasm for you!");
}
"""
webView.evaluateJavaScript(testWasm)
}
}
Does iOS actually have a way to load WebAssembly into a Swift-based app?