global catch in javascript

1<script>
2  window.onerror = function(message, url, line, col, error) {
3    alert(`${message}\n At ${line}:${col} of ${url}`);
4  };
5
6  function readData() {
7    badFunc(); // Whoops, something went wrong!
8  }
9
10  readData();
11</script>