How can i fix the error Uncaught ReferenceError: addEvent is not defined

Question

After changing my python and Django version I came up with the error of
Uncaught ReferenceError: addEvent is not defined.

The error took place at my DateTimeShortcuts.js file.

The code raising the error is:

addEvent(window, 'load', DateTimeShortcuts.init);
window.DateTimeShortcuts = DateTimeShortcuts;

This error prevents me for rendering correct a date widget that I am using for my Django app.

Any idea how to handle it?

user_3722635 · Answer

From commit into Django framework "Fixed #28536 -- Removed old JS cross-browser utilities" you can see that there were changes in that file.

python manage.py collectstatic

user_11960762 · Answer

The problem is 'addEvent' is not defined previously.

Make sure that you have the definition of 'addEvent' imported or written before this line.

user_5458200 · Answer

Maybe you should write

window.addEventListener("load", ...