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JavaScript

28 videos · 12 per page.

Any length Under 30 min 30–60 min Over 60 min
Any level Beginner Middle Advanced
map / filter / reduce24 min

Beginner

Array methods you actually use

Maya Chen · map, filter, reduce — skip the rest until you need it.
event loop41 min

Middle

The event loop with pictures

Sam Ortiz · Call stack, microtasks, why setTimeout(0) is not now.
fetch18 min

Beginner

fetch without a library

Lea Holm · GET, POST, JSON, and the one catch you always forget.
modules55 min

Middle

ES modules in the browser

Alex Morgan · type=module, import maps, when bundlers still help.
testing72 min

Advanced

Vitest on a small UI

Riley Cole · One hour, a form, and tests that fail for a reason.
closures12 min

Beginner

Closures in twelve minutes

Maya Chen · A function that remembers. That is the whole talk.