And because it's been around for decades, people figure out how create something like that functionality for other languages: JavaScript Time-Travel Debugger

And because it's been around for decades, people figure out how create something like that functionality for other languages: JavaScript Time-Travel Debugger https://www.microsoft.com/en-us/research/project/javascript-time-travel-debugger/ https://www.microsoft.com/en-us/research/project/javascript-... https://channel9.msdn.com/blogs/Marron/Time-Travel-Debugging-for-JavaScriptHTML https://channel9.msdn.com/blogs/Marron/Time-Travel-Debugging...