Get all javascript errors on page/javascript error handling

When an exception is raised in most languages, execution of the current command stack is going to be stopped. So your global window.onerror approach works, but doesn't continue to execute code after a failure. I'm curious why you would expect a retry to work in the case that the original call fails? Maybe there's another way to optimize your application to avoid this.

One of the things I like to do is wrap any of my code in window.onerror function in a try catch block. In the catch statement (last resort) I will generally use an alert of some sort, just in case something goes catastrophically wrong. The idea here is that you don't want your error handling for the page to EVER end up causing another error to be launched.

I have mine working with window.onerror and it doesn't stop my javascript:

window.onerror = function(error, url, line) {
    controller.sendLog({acc:'error', data:'ERR:'+error+' URL:'+url+' L:'+line});
};

Note that controller.sendLog is a function that sends this data to a logging php.

Can be because you're causing some javascript error inside that function?

Sorry but try/catch will catch only code errors, never load error (if a file is missing or something that).

window.onerror / $(window).error is definitely the best solution.