Free course

Hono Course

Build a typed Hono API with Web Standard primitives, middleware, validation, testing, inferred clients, and two deployment runtimes.

5 modules · 25 lessons · No signup

Prerequisites: TypeScript, HTTP and Web APIs

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What you'll learn

Build and test a bookmarks API, then deploy the same portable core to Node and Cloudflare Workers with explicit runtime boundaries.

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Course contents

  1. Hono foundations

    Start from Web Standards and separate portable app code from runtime adapters.

    1. ✓ Start from Web Standards
    2. ✓ Choose a runtime adapter
    3. ✓ Use context deliberately
    4. ✓ Return clear responses
    5. ✓ Check your understanding: hono foundations

  2. Routing and middleware

    Design the route tree and compose typed middleware in a visible order.

    1. ✓ Design the route tree
    2. ✓ Understand middleware order
    3. ✓ Use built-in middleware selectively
    4. ✓ Write request context middleware
    5. ✓ Check your understanding: routing and middleware

  3. Validation and errors

    Validate the right input target and handle errors, cookies, and authorization.

    1. ✓ Validate the correct target
    2. ✓ Connect a schema validator
    3. ✓ Handle errors centrally
    4. ✓ Use cookies and authorization safely
    5. ✓ Check your understanding: validation and errors

  4. Type-safe clients and testing

    Test through app.request and use inferred clients without dropping runtime checks.

    1. ✓ Test with app.request
    2. ✓ Use test helpers where they help
    3. ✓ Build a typed RPC client
    4. ✓ Test the contract, not the types
    5. ✓ Check your understanding: type-safe clients and testing

  5. Deploy and operate Hono

    Model bindings, deploy to two runtimes, observe behavior, and measure portability.

    1. ✓ Model runtime bindings
    2. ✓ Deploy to Node and Workers
    3. ✓ Observe portable applications
    4. ✓ Finish the portability report
    5. ✓ Check your understanding: deploy and operate hono