Google Analytics error reporting skeleton. NOTE THAT THIS DOES NOT WORK!!! This is just an example how to hook to window.onerror

ga-error.js

function sendErrorToAnalytics(err) {
    console.log('Sending error to analytics', err);

    // WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    // Google analytics exception's exDescription max length is 150 bytes.
    // USE ANOTHER EXCEPTION LOGGING SERVICE IF YOU NEED TO LOG E.G. STACKTRACES
    ga('send', 'exception', {
        exDescription: err.stack,
        fatal: false
    });
}

var Promise = require('bluebird');
Promise.onPossiblyUnhandledRejection(function(error) {
    throw error;
});

// The first 3 parameters are quite standard but some browsers offer the actual
// error object as fifth parameter.
window.onerror = function onGlobalError(message, file, line, column, errorObj) {
    var shortDescription = file + '(' + line + '): ' + message;
    
    if (errorObj) {
        sendErrorToAnalytics({
            stack: shortDescription + '\n' + errObj.stack;
        });
    } else {
        sendErrorToAnalytics({
            stack: shortDescription 
        });
    }    
};