Skip to content
skillbld
All courses

Learn Node.js by running it right in the page: modules and npm, the file system, async code and the event loop, events, streams and buffers, HTTP servers, a REST API with middleware, configuration and error handling, and testing with node:test. Every example is a real Node.js program you can edit and run, with diagrams and a quick knowledge check every day.

  • 14 days
  • ~30 min / day
  • Intermediate
  • Free account required
Already know some of this? Take the 70-question skill test
0/14

Ready when you are

Saved on this device. No account needed.

Start Day 1

The big picture

Everything you'll cover, and how it fits together.

Mind map · click a dot to fold, drag to pan

Day by day

Go at your own pace. Your progress is remembered on this device.

  1. 1
    Day 1Up next 30 min

    What Is Node.js?

    JavaScript outside the browser: the runtime, scripts and the process object.

    RuntimeScriptsprocess
  2. 2
    Day 2 30 min

    Modules

    Split code into files with CommonJS and ES modules, and use built-in modules.

    requireimport/exportBuilt-ins
  3. 3
    Day 3 30 min

    npm & package.json

    Install packages, run scripts and understand versions and lockfiles.

    npmScriptsSemver
  4. 4
    Day 4 30 min

    The File System

    Read, write and organise files and folders with fs and path.

    fspathJSON files
  5. 5
    Day 5 30 min

    Asynchronous Node

    Callbacks, promises and async/await, and handling their errors.

    CallbacksPromisesasync/await
  6. 6
    Day 6 30 min

    The Event Loop

    How Node runs many things at once on one thread, and how not to block it.

    Event loopMicrotasksBlocking
  7. 7
    Day 7 30 min

    Events & EventEmitter

    Build event-driven code with EventEmitter.

    EventEmitterListenersErrors
  8. 8
    Day 8 30 min

    Streams & Buffers

    Process data piece by piece with streams, and handle binary data with Buffers.

    BuffersStreamspipeline
  9. 9
    Day 9 30 min

    An HTTP Server

    Build a web server with the http module: requests, responses and routing.

    httpRoutingStatus codes
  10. 10
    Day 10 30 min

    Building a REST API

    Create, read, update and delete resources with JSON and validation.

    RESTJSON bodiesValidation
  11. 11
    Day 11 30 min

    Middleware & Express

    Build a tiny framework with middleware, then see how Express does it.

    MiddlewareRoutersExpress
  12. 12
    Day 12 30 min

    Config, Errors & Logging

    Environment variables, error handling, logging and graceful shutdown.

    Env varsErrorsLogging
  13. 13
    Day 13 30 min

    Testing with node:test

    Write and run tests with Node's built-in test runner and assert.

    node:testassertMocks
  14. 14
    Day 14 30 min

    Project: A Notes API

    Build a tested REST API that stores notes in a JSON file.

    PlanningBuildingTesting