Actually, no, beneath the JS layer is the browser, which is a massive wall of architecture-independent C++ with its own graphics abstractions and high-level con

Actually, no, beneath the JS layer is the browser, which is a massive wall of architecture-independent C++ with its own graphics abstractions and high-level constructs. You'd need to drop another level or three to reach the C layer. I dare you to actually try SDL sometime; it is far less pain than doing browser work in JS.