Browsers do implement Javascript using a bytecode based VM - https://github.com/WebKit/webkit/tree/master/Source/JavaScriptCore/bytecode https://github.com/WebK

Browsers do implement Javascript using a bytecode based VM - https://github.com/WebKit/webkit/tree/master/Source/JavaScriptCore/bytecode https://github.com/WebKit/webkit/tree/master/Source/JavaScri... It just isn't standardized, or made available to website authors directly (there would likely need to be significant extra security audits before you could contemplate something like that...).