Early last year a new online resource was launched for WordPress developers called Hookr.io. The website is described as The WordPress Hook/API Index, but it is so much more.
Fast forward to today and Hookr.io has just launched a new beta layout. Not only does the website feature documentation for WordPress Core, but it also includes information on popular plugins and themes. Hookr.io displays more than just action and filter hooks, it also includes all Classes, Constants, Functions, and Shortcodes available. You can easily filter through the data to find exactly what you are looking for. The new beta also features a more simplified UI and is device agnostic.
Hookr.io is a very valuable resource for all WordPress developers. If you haven’t already, bookmark this website. You will thank me later!