Only works on apps that have WebUI X

class DomModifierInterface(private val webView: WebView) {

    private val coroutineScope = CoroutineScope(Dispatchers.Default)

    @JavascriptInterface
    fun runHeavyTask() {
        coroutineScope.launch {
            // Heavy background work here
            val result = doHeavyWork()

            // Switch to main thread to update the UI / DOM
            withContext(Dispatchers.Main) {
                webView.evaluateJavascript(
                    "document.body.innerHTML += '<p>Heavy task result: $result</p>'",
                    null
                )
            }
        }
    }

    private suspend fun doHeavyWork(): String {
        // Simulate heavy work, e.g., complex calculations or I/O
        delay(3000)
        return "Task Completed"
    }
}