In-Memory Todo CRUD API with Node.js and Express

[beabcanoy]

A simple RESTful API using Node.js and Express that manages todos in memory. Supports creating, updating (including toggling completed), and deleting todos with validation and clear messages. All data is stored in a shared array that resets when the server stops or there are changes in code, ideal for learning backend development, testing endpoints, and learning without a database.

[Copilot]

Pull request overview

Adds a simple in-memory Todo REST API to the backend Express app, exposing CRUD endpoints under /api and using a shared array as the data store.

Changes:

• Switch backend runtime to ES modules and mount /api todo routes.
• Add todo routes + controller implementing create/read/update/delete for in-memory todos.
• Add an in-memory todos data module and a dev script for local development.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
backend/index.js	Converts server entrypoint to ESM, enables JSON parsing, mounts /api routes
backend/package.json	Declares ESM mode and adds dev script + new dependency entry
backend/routes/todo.routes.js	Defines REST routes for todo CRUD endpoints
backend/controllers/todo.controller.js	Implements CRUD handlers and ID generation
backend/data/todos.js	Adds shared in-memory todos array

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