JSFiddle - React, Tailwind, and code Playground

JavaScript

var txt="";

try
  {
  testMethode(30);
  }
catch(err)
  {
  txt="There was an error on this page.\n\n";
  txt+="Error description: " + err.message + "\n\n";
  txt+="Click OK to continue.\n\n";
  alert(txt);
  }