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Can't read from a file using JSPromise #121

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@revolter

Description

I know that this is more of a support issue than a bug report, but I really don't know what else to try, and didn't find another help channel.

Here is the entire script using Tokamak:

import JavaScriptKit
import TokamakDOM

struct TokamakApp: App {
    var body: some Scene {
        WindowGroup("Tokamak App") {
            ContentView()
        }
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            HTML("input", [
                "id": "file",
                "type": "file"
            ])
            Button("Convert") {
                let document = JSObject.global.document
                let input = document.getElementById("file")
                let file = input.files.item(0).object!

                let promise = file.text.function!.callAsFunction().object!

                JSPromise<JSValue, Error>(promise)!.then { value in
                    let console = JSObject.global.console.object!
                    let log = console.log.function!

                    log(value)
                }
            }
        }
    }
}

// @main attribute is not supported in SwiftPM apps.
// See https://bugs.swift.org/browse/SR-12683 for more details.
TokamakApp.main()

which is throwing this error:

Unhandled Promise Rejection: TypeError: Can only call Blob.text on instances of Blob

Running

document.getElementById("file").files.item(0).text().then(text => console.log(text))

works though.

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