Astexplorer.net

Astexplorer.net is a programming tool that will allow you to paste the JavaScript code into the editor.

This tool will be produce an abstract syntax tree that will give you a better understanding of how JavaScript code works.

What is the Abstract Syntax Tree?

It's a hierarchical representation of the program that presents the source code structure according to the grammar of the programming language, each AST node that matches the source code item.

(All images listed are taken from the official website)