Is there a way to unhook the Javascript error popup?

Currently UnityLoader.js handles errors, so that if an error occurs during loading, it pops up a window.

I want to be able to catch and log loading errors. Is there a graceful way to unhook the catching from UnityLoader?

My one strategy is to unminify UnityLoader.js, unhook it in there, and reminify it. But I would like to know if there is a better way to do it.

 

Yep, quick way to do it is to override the error handler - you don't have to do this in the UnityLoader itself, you can do this in your own separate JS script block.

Code (JavaScript):

1. UnityLoader.Error.handler = function(e, t)
2. {
3.     console.log(e);
4. }
5.  

e is the error (e.message is the raw string if you want to compare it against certain types of errors)
Unfortunately I can't remember of the top of my head what 't' is.

 

awesome, thank you so much guys!

 

When you say your own separate JS block, do you mean in a different .jslib file? Would that work?

Edit: OHMYGOLYGOSH you are right. It does work. <3 Thanks!

 

Hey there, trying to implement this same fix! A bit new to using jslib files; I created a jslib file with below contents, and dropped that in the Plugins folder, but it is failing to compiler on build without giving much feedback, just an obscure stracktrace.

What am I doing wrong here? Any help would be greatly appreciated!

Code (JavaScript):

1. mergeInto(LibraryManager.library, {
2.     UnityLoader.Error.handler = function(e,t)
3.     {
4.         console.log(e);
5.     },
6. });

 

Code (CSharp):

1. mergeInto(LibraryManager.library, {
2.      UnityLoader.Error.handler = function(e,t)
3.      {
4.          console.log(e);
5.      },
6.  };);

maybe that?

or just write it separately so it is more readable. like

Code (CSharp):

1. var dodgeFn = {
2.     UnityLoader.Error.handler = function(e,t)
3.     {
4.        console.log(e);
5.     },
6. };
7. mergeInto(LibraryManager.library, dodgeFn);

 

Thanks for the help @ravishnair , unfortunately it's still failing on build. There's not much feedback, other than a long console output starting like this:

Code (CSharp):

1. stdout:
2. stderr:WARNING:root:--separate-asm works best when compiling to HTML. Otherwise, you must yourself load the '.asm.js' file that is emitted separately, and must do so before loading the main '.js' file. [-Wseparate-asm]
3. error: failure to execute js library

Seems like it doesn't like the syntax and is getting a compiler error when converting, but what's strange is that when I upload a .js file including just:

Code (JavaScript):

1. UnityLoader.Error.handler = function(e,t)
2. {
3.     console.log(e);
4. }

And manually reference this script when I instantiate the gameinstance, it works fine and overrides the Error Handler as intended. Seems to be an issue with the mergeInto() portion... time to dig further into that.

 

.jslib is for cases when you want to have reference from C# to JS using DLL import.
In your case, you can use .jspre file, there you can write JS as usual...
You can also have a reference from .jslib file to a method in a .jspre file.

 

Hello forum, I'm new to Unity WebGL. I've been searching to replace Javascript error popup like "An error occurred running the Unity content on this page. See your java script console for more info", I know this is getting by object reference since I removed ref in instantiate. So, in Unity 2021.3.11f1, there is no UnityLoader since there is only unityInstance in createUnityInstance() in index.html. Please help me to the right direction. Sorry to post this on old thread.

 

Just found out in loader.js, an "alert(e)" which is generating the error messages.