> For the complete documentation index, see [llms.txt](https://program.hackyourfuture.dk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://program.hackyourfuture.dk/course-content/frontend/advanced-javascript/week4/session-plan.md).

# Session Plan

## Session Materials

* [Demo](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/demo/README.md) – In-session live coding: plain-object motivation, `Comment` class, methods, flagged comments, then Errors / Web Components as “real world” context. **index.js** = worksheet; **index-solution.js** = reference. [README](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/demo/README.md).

## Session Outline

Start VERY simple. Just a class that has few fields, no methods. Explain the diff from object to class. Explain instance etc. When they get that move on to class methods. **Only teach extends if they really are on top of things** otherwise just get them comfortable with classes :) if you can repeat a bit of promise, maybe when working with class that would be great.

* Constructor
  * [Code inspiration](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/code-inspiration.md#constructor)
  * [Exercise](/course-content/frontend/advanced-javascript/week4/exercises.md#1-create-a-user-class)
* Instance
  * [Code inspiration](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/code-inspiration.md#instance)
  * [Exercise](/course-content/frontend/advanced-javascript/week4/exercises.md#2-create-an-instance-of-the-class)
* Methods (instance + static)
  * [Code inspiration](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/code-inspiration.md#methods)
  * [Code inspiration — static methods](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/code-inspiration.md#static-methods) (Promise as "you already use this")
  * [Exercise](/course-content/frontend/advanced-javascript/week4/exercises.md#3-create-a-class-method)
* `this`
  * Refers to the instance of the class. Do go into too much detail and edge cases. Avoid mentioning `bind`, `apply`, etc unless you find it super important, the trainees will just forget it anyway!
* [Exercise](/course-content/frontend/advanced-javascript/week4/exercises.md#4-creating-a-cv-class)
* Extend (Only if time!)
  * [Code inspiration](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/code-inspiration.md#extending-built-ins-error-and-web-components) (`Error`, `ValidationError`, Web Components sketch — matches demo Part 4)

## Exercises

See the separate [Exercises](/course-content/frontend/advanced-javascript/week4/exercises.md) document.

## Code inspiration

See the separate [Code inspiration](https://github.com/HackYourFuture-CPH/program/blob/main/courses/frontend/advanced-javascript/week4/session-materials/code-inspiration.md) document.


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