Essential Javascript For Beginners Download

Description

How do JavaScript engines work?

JavaScript Engines are complicated. But it works on some simple basics:

The engine reads (“parses:) the script.
Then it converts or compiles the script to the machine language.
After that machine code runs.
Here, JavaScript engine applies optimizations at each step of the process. It reads a compiled script and analyzes the data that passes in JavaScript engine. After that, it applies optimizations to the machine code from that acquired knowledge. When this process is completed, scripts run quite fast.