Knowledge of HTTP requests and responses will be more helpful.
The Reporting API is a mechanism for web servers to tell browsers where to send errors and other information about a browsing session.
Using the Reporting API it is possible to get Drupal to record errors on your website's client-side.
- An understanding about HTTP Response header
- An understanding about how to get a report of your website's client-side errors?
- Altering HTTP Request and Response header in Drupal.