🧠 Minimal GraphQL Engine in Node.js — Built from Scratch

This project is a learning-first implementation of a GraphQL-like query system using plain JavaScript.

No external libraries, no GraphQL packages — just raw recursion and logic to understand how GraphQL really works under the hood.

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🔍 Features

• Supports nested queries like:

{ user { name posts { title } } }

• Returns clean, structured responses:

{
  "user": {
    "name": "John Doe",
    "posts": [
      { "title": "My First Post" },
      { "title": "Second Post" }
    ]
  }
}

• No overfetching — returns only what's requested

• Built with Express.js for easy testing via a /graphql POST endpoint

🛠️ Tech Stack

• Node.js

• Express

• Pure JavaScript (no GraphQL libraries)

📁 Structure

• utils.js: Contains the core parser and resolver logic

• server.js: Express server with /graphql endpoint

🚀 Getting Started

git clone https://github.com/yourusername/graphql-from-scratch
cd graphql-from-scratch
npm install
node server.js

Make a POST request:

POST /graphql
{
  "query": "{ user { name posts { title } } }"
}

🛣️ Roadmap

• ✅ Nested querying

• 🔜 Multiple root queries

• 🔜 Schema validation

• 🔜 Variable & fragment support

📚 Why This?

Inspired by curiosity. GraphQL is powerful — but even more so when you understand how it works internally.

🧑‍💻 Author

Aman Tyagi — LinkedIn