JavaScript · Beginner

JavaScript From Zero

The language of the web, taught by writing it. Learn each layer in tested exercises, prove it in low-scaffold checkpoints, then build an asynchronous browser interface from a fresh brief.

5 h 39 min16 of 16 lessons live16 coding challenges

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Curriculum

7 modules, 16 lessons, built to be done in order.

01Values and logicThe building blocks you will use every day.4 lessons

Variables, types and truthinesspractice · 15 min
Functions and return valuespractice · 16 min
Conditionals and guard clauseschallenge · 16 min
Checkpoint: checkout calculatorchallenge · 22 min

02Working with dataArrays and objects, the workhorses of JS.4 lessons

Arrays and iterationpractice · 18 min
Objects and destructuringpractice · 18 min
map, filter, reducechallenge · 20 min
Checkpoint: order summarychallenge · 25 min

03Debugging like a professionalRead the error, form a theory, test it.2 lessons

Reading stack traceschallenge · 16 min
Debug the cart totalchallenge · 20 min

04Inside the browserLoad scripts deliberately and debug the real page.1 lessons

Run JavaScript in a browserpractice · 18 min

05The DOMMake the page respond to people.3 lessons

Selecting and updating elementspractice · 18 min
Events and statechallenge · 22 min
Checkpoint: packing listchallenge · 30 min

06Asynchronous codePromises, async/await and waiting well.1 lessons

Promises and async/awaitchallenge · 20 min

07Independent projectCombine state, the DOM and asynchronous work.1 lessons

Capstone: product searchchallenge · 45 min