Logging Clientside JavaScript Errors on Server [closed]

Question

Im running a ASP.NET Site where I have problems to find some JavaScript Errors just with manual testing.

Is there a possibility to catch all JavaScript Errors on the Clientside and log them on the Server i.e. in the EventLog (via Webservice or something like that)?

Answer 1

You could try setting up your own handler for the onerror event and use XMLHttpRequest to tell the server what went wrong, however since it's not part of any specification, support is somewhat flaky.

Here's an example from Using XMLHttpRequest to log JavaScript errors:

window.onerror = function(msg, url, line) {   var req = new XMLHttpRequest();   var params = "msg=" + encodeURIComponent(msg) + '&url=' + encodeURIComponent(url) + "&line=" + line;   req.open("POST", "/scripts/logerror.php");   req.send(params); }; 

Answer 2

Short answer: Yes, it is possible.

Longer answer: People have already written about how you can (at least partially) solve this issue by writing your own code. However, do note that there are services out there that seems to have made sure the JS code needed works in many browsers. I've found the following:

• http://trackjs.com
• https://www.atatus.com
• http://jserrlog.appspot.com
• http://muscula.com
• https://sentry.io
• https://rollbar.com
• https://catchjs.com

I can't speak for any of these services as I haven't tried them yet.