sprintf in js

[VICTORVICKIE]

Hey,

I have implemented essential formatting (without 3rd party dependency) as a learning challenge. can I make a pr or still in the idea of compiling stb_printf?

It is around 300L of implementation, still pending are

// Flags => # *
// Len Mod => j z t L
// Specify => o x X e E a A g G n p

https://gist.github.com/VICTORVICKIE/faa7a7252607f600fb114781fd4d1ade#file-index-html-L36

comparison of outputs, examples are taken from https://en.cppreference.com/w/c/io/fprintf