This repository contains the starter files and completed solutions for Wes Bos's 'JavaScript30' course - a collection of 30 vanilla JavaScript exercises, each a self-contained mini-application demonstrating a specific browser API or JavaScript pattern. The exercises cover: DOM manipulation and events (Drum Kit, Clock, Whack-a-Mole), modern array methods (Array Cardio Days 1-2), localStorage persistence, HTML5 Canvas drawing, custom video player controls, speech recognition/synthesis, webcam/media devices API, geolocation, CSS variables manipulation, flexbox transitions, sticky navigation, drag-to-scroll, type-ahead autocomplete, shift-click range selection, konami code detection, scroll-triggered animations, dropdown navigation, link highlighting, and various console/debugging techniques. Each exercise exists as a pair: START (boilerplate HTML/CSS) and FINISHED (working solution). The code is intentionally written as inline scripts in HTML files to match the video tutorials, not as modular, reusable components. There are no build tools, test suites, or dependency management (except browser-sync for live-reload in a few exercises). The repo is actively maintained to stay in sync with the course videos, but the content is pedagogically frozen - PRs that improve code but deviate from the videos are explicitly rejected.