JavaScript

Part 1: The basics

What JavaScript is, the kinds of value it works with, and how to read an error message.

1. 1JavaScript from zero45 min · 4 steps

Part 2: Logic

Decisions, guard clauses, picking a value, and going through a list.

1. 2Decisions and repetition45 min · 4 steps

Part 3: Values and functions

Variables, functions that return, arrays and objects.

1. 3JavaScript basics45 min · 4 steps

Part 4: The page

Finding elements, changing what is on screen, and responding to what people do.

1. 4Making pages interactive40 min · 3 steps
2. 5Events: making the page respond50 min · 4 steps

Part 5: Waiting

Timers, promises, async and await, and requests done properly.

1. 6Waiting: timers, promises and fetch50 min · 4 steps

Part 6: Structure and data

Scope and closures, functions you can trust, reading data safely, and saving it.

1. 7Scope, closures and keeping code tidy45 min · 4 steps
2. 8Working with data45 min · 4 steps

Part 7: Finding faults

Reading a stack trace, pausing your code, and failing loudly rather than quietly.

1. 9Finding out what went wrong40 min · 3 steps

Part 8: Projects

Two features end to end, then the pass that decides whether it is really finished.

1. 10Project: a quote calculator that works75 min · 4 steps
2. 11Project: make the business site work80 min · 4 steps