I have an error logging function along with a call to an undefined variable t:
const errortext = document.getElementById("errortext");
window.addEventListener("error", function (msg, file_loc, line_no) {
errortext.innerHTML += msg + " " + file_loc + " " + line_no;
});
t
It fires, but errortext is this:
[object ErrorEvent] undefined undefined
My question is, why arguments are not being passed, and what can I do to fix it?
If you refer to the MDN docs on global error handlers here it says
For historical reasons, different arguments are passed to window.onerror and element.onerror handlers (as well as on error-type window.addEventListener handlers).
Under addEventListener it shows the signature
window.addEventListener('error', function(event) { ... })
while it looks like onerror gives you the params you are expecting
window.onerror = function(message, source, lineno, colno, error) { ... };