ShatterJS

Since these things are so, we must agree that that which keeps its own form unchangingly, which has not been brought into being and is not destroyed, which neither receives into itself anything else from anywhere else, nor itself enters into anything anywhere, is one thing

— Plato, Timaeus

Decomposes JavaScript files into their four fundamental components: shebang, header, body, and footer.

Features

• Each component is an OOP object that can easily be worked with.
• Header and Footer are subdivided further into comment blocks, comment lines or empty lines.

Warning

I have made the functionality as robust as I could currently foresee to accomplish the goals I had for this package.

Please keep in mind:

• JavaScript document structure is complex, and it's likely I didn't consider all fringe cases and uses.
• The abstract nature of how documents are decomposed could lead to a rapidly evolving API that may not be compatible with current versions.
• I will release a new major version for each breaking change, following a period of evaluation on the current 1.0.0 version.

Note: Use in production environments with caution due to potential structural changes in future major versions

📦 Installation

npm install shatterjs

Or with Yarn:

yarn add shatterjs

🚀 Quick Start

import { Doc } from 'shatterjs';

const source = `
#!/usr/bin/env node
// This is a header comment
/* Multi-line
   block comment */
const hello = 'world';
console.log(hello);
// Footer note
`;

const doc = new Doc();
doc.from(source);

console.log('Shebang:', doc.shebang.content);
console.log('Header:', doc.head.content);
console.log('Body:', doc.body.content);
console.log('Footer:', doc.footer.content); 

🧩 Component Breakdown

Shebang

Detects the shebang line (if present).

Head

Captures decorative comments before code starts.

Body

Framed from the start of valid code to the end of valid code.

Footer

All content after the last line of valid code.

InlineComment

Single-line comments (e.g., // comment).

BlockComment

Block comments spanning multiple lines /* comment */

EmptyLine

A line filled only with whitespace or a single line break \n.

Project Links

I use GitHub as the primary public development spot: https://github.com/alexstevovich/shatterjs

Why ShatterJS?

I created ShatterJS for my licensing preamble package LawfulGood to identify whether a preamble already exists and where to insert a block of licensing code at the start of a document.

I modularized the functionality as I can see other use cases for this beyond script licensing.

License

Licensed under the Apache License 2.0.