

More modern browsers use a technology known as Just-In-Time (JIT) compilation, which compiles JavaScript to executable bytecode just as it is about to run.

Instead, an interpreter in the browser reads over the JavaScript code, interprets each line, and runs it. In contrast, JavaScript has no compilation step. The source code is passed through a program called a compiler, which translates it into bytecode that the machine understands and can execute. A program such as C++ or Java needs to be compiled before it is run. JavaScript is an interpreted language, not a compiled language. The solution provided in this tutorial can also work with Flask, another web framework in the Python community.

