WebGL error handler in loader page

He guys.

Can anyone point me to a code example how I can add an errorhandler in the new webgl loader page structure? I managed the old way easily but got stuck the new way (https://docs.unity3d.com/Manual/webgl-templates.html)
Reason for asking is cause I can't find code that actually calls the handler in case something bad happens.
Thanks!

 

Anyone?

 

Hello! Replying to this 4.5 year old thread just in case anyone else has this same need.

But first... shame on Unity for not making this more explicit. Even in 2022, it doesn't seem to be in any documentation whatsoever. The "new" errorhandler also doesn't seemingly catch all errors, making it of limited usefulness, though it does seem to catch Out of Memory errors, which are a pretty serious concern.

Anyway, the secret is to use a .jspre file in a Plugins folder under Assets. Here's an example of working contents, at least for Unity 2020.3.4f1:

Code (JavaScript):

1.  
2. Module.errorHandler = function(message, filename, lineno) {
3.  
4.     // <your own error handling here>
5.     // console.log(filename + ":" + lineno);
6.  
7.     // Return "true" to stop the default error handling
8.     return true;
9. };
10.