const messenger = window.webkit.messageHandlers

window.onload = (eve) => {
    console.log("Loaded...");
}

window.onerror = function(msg, url, line, col, error) {
   // Note that col & error are new to the HTML 5 spec and may not be supported in every browser.
   const suppressErrorAlert = false;
   let extra = !col ? '' : '\ncolumn: ' + col;
   extra += !error ? '' : '\nerror: ' + error;
   const data = `Error:  ${msg} \nurl: ${url} \nline: ${line}  ${extra}`

   logUIExceptionAjax(data);

   // If you return true, then error alerts (like in older versions of Internet Explorer) will be suppressed.
   return suppressErrorAlert;
};

const say_hello = () => {
    messenger.backend.postMessage("Hello, World!");
}