To become the 'best' Javascript programmer you'd probably need to know everything about Javascript. Also you'll need to know its limits. To know its limits you

To become the 'best' Javascript programmer you'd probably need to know everything about Javascript. Also you'll need to know its limits. To know its limits you should probably learn about other things that aren't Javascript but closely related to it eg other programming languages, web browsers, HTML, DOM etc. Good luck! Let us know how it works out.