JavaScript Engine under the hood: How is Code Translated and Executed? | Core JavaScript
Have you ever wondered how JavaScript code gets compiled and executed by your browser? In this video, we'll take a deep dive into the inner workings of the JS Engine. We'll cover the six primary components that make up the JS Engine, including the parser, abstract syntax tree, interpreter, profiler, compiler, and optimised code. You'll learn how the JS Engine converts your code into executable code, and how it executes that code using the call stack and memory heap. By the end of this video, you'll have a clear understanding of how your JavaScript code gets compiled and executed, and what you can do to optimise its performance.
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Content:
00:00 - Intro
00:18 - What is a JS Engine?
00:39 - How does the JS Engine work?
01:00 - Parser
01:41 - Parser - Tokens
02:22 - Abstract Syntax Tree
03:57 - Interpreter
04:28 - Interpreter - Bytecode
05:06 - Profiler
05:16 - Compiler
05:42 - Compiler - Machine Code
06:17 - Optimise Machine Code
06:52 - How does the engine convert code?
07:56 - JS Code Execution
08:04 - Call Stack
08:53 - Memory Heap
09:35 - How code is executed by JS Engine?
09:58 - Summary
Tools being used:
Code editor: VS Code ( https://code.visualstudio.com/ )
Manage version control: GIT ( https://git-scm.com/downloads )
GUI for GIT: Sourcetree ( https://www.sourcetreeapp.com/ )
Design: Pencil Project ( https://pencil.evolus.vn/ )
Repository: GitHub( https://github.com/DecodeWebWithRohan... )
Graphic Design: Canva ( https://www.canva.com/ )
Recording: OBS Studio ( https://obsproject.com )
Video Editor: DaVinci Resolve ( https://www.blackmagicdesign.com/prod... )
Link to the code repositories:
https://github.com/DecodeWebWithRohan...
Please consider supporting the channel:
https://paypal.me/DecodeWebWithRohan
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