Demo - https://cdn.mjp.co/demos/js/astar/
A simple Javascript OO A* path finder class.
Well commented code. Perfect for learning but not optimised for performance.
To convert two colour PNGs into a Javascript array for use with the A* class, use the generate-map.php
script.
php generate-map.php mymap
This will read mymap.png and generate a mymap.js file.