Bundle catches javascript errors and saves them in server logs
Work in progress, not ready for production usage
Download EEExceptionJSBundle using composer
Add EEExceptionJSBundle in your composer.json:
{
    "require": {
        "ee/exceptionjs-bundle": "dev-master"
    }
}
Tell composer to download the bundle by running the command:
$ php composer.phar update ee/exceptionjs-bundle
Composer will install the bundle to your project's vendor/ee directory.
<?php
// app/AppKernel.php
public function registerBundles()
{
    $bundles = array(
        // ...
        new EE\ExceptionJSBundle\EEExceptionJSBundle(),
    );
}Add at the beginning of app/config/routing.yml
    ee_exceptionjs_bundle:
        resource: "@EEExceptionJSBundle/Resources/config/routing.yml"
        prefix:   /
In your base layout include once
    {% include 'EEExceptionJSBundle::catcher.html.twig' %}