How is Javascript translated to bytecode?

Question

I can\'t find information on the web how W3C languages compile to machine code. I know that the gap between the web and the processor must be somehow the browser, but how do

Answer 1

For Firefox there's some specifications on its bytecodes:

https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Bytecodes https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Internals/Bytecode

For V8 it's compiled to native code directly:

http://jayconrod.com/posts/51/a-tour-of-v8-full-compiler