JSCamp Barcelona 2019
as the organisers put it
International single-track and two-day conference covering all about modern web technologies
who it's for
frontend engineers, web developers, performance engineers, accessibility engineers, tooling engineers, engineering managers
topics
iterable and iterator protocols; weak maps and private fields; generational garbage collection behavior; compiler-driven UI bundling (Svelte); JAMstack static site deployment; CSS-in-JS tradeoffs and runtime costs; accessible widgets and keyboard handling; bundle splitting and dynamic imports; service workers with Workbox; algorithmic performance optimizations in JavaScript; browser devtools cross-browser debugging
| title | author | length |
|---|---|---|
| Jscamp 2019 | Conference Opening Video | 02m |
-- no description -- | ||
| Welcoming | Courtney Christian | 11m |
Welcome notes list about 600 attendees from 55 countries, sponsor shoutouts (Dynatrace, Webflow, others), and scholarship acknowledgments; Catalonia’s tech… | ||
| What happens next: a choose-your-own-adventure with iterators | Jenn Creighton | 28m |
Demonstrates that ES6 iterable and iterator protocols actually power for‑of, spread, and array destructuring and that generators plus yield delegation* consume… | ||
| weak collections, ephemerons, and private fields by Sigurd Schneider | JSCAMP 2019 | Sigurd Schneider | 27m |
Explains how weak maps polyfill private fields by storing per-object side tables, contrasts that with in-object private slots, and shows why generational GC… | ||
| The Return of 'Write Less, Do More' | Rich Harris | 29m |
Argues for a compiler-first UI approach that turns HTML+CSS+JS into minimal runtime code, demonstrates a simple button implemented as web component, React… | ||
| JAMStack - The Total Victory of JavaScript | Shwan Wang | 31m |
Argues that JAMstack actually delivers: pre-rendered markup plus JavaScript and APIs yields static assets served from CDN, cutting runtime servers and… | ||
| "CSS in JS - The good, The bad and The ugly" | Maya Shavin | 39m |
Starts from the claim that CSS-in-JS solves global namespace and dead CSS problems but at the cost of runtime work and fragmentation: about 40+ libraries with… | ||
| Accessible JavaScript patterns | Garance Flore Vallat | 22m |
Live demos show a working accessible nav and modal with code on GitHub, not theory: keyboard handling implements arrow keys home end pageup pagedown plus… | ||
| How we make Web Apps lightning fast at Microsoft | Sean Thomas Larkin | 27m |
Performance audit shows heavy JavaScript as the dominant cost: use Chrome/Edge coverage to measure unused code, apply webpack dynamic imports to split locale… | ||
| Algorithmic performance optimization in practice | Vladimir Agafonkin | 36m |
Libraries and concrete fixes are listed with outcomes: open source projects include leaflet, geojson-vt and supercluster, a Delaunator triangulation that… | ||
| How to effectively use the dev tools in all the browsers | Paul Verbeek-Mast | 30m |
A browser-based video conferencing tool aimed at one‑on‑one doctor‑patient calls uses WebRTC and forces cross‑browser debugging of actual DOM, CSS and… | ||
| Shape Of The Web | Henri Helvetica | 34m |
Covers concrete history and a practical argument for inclusion: traces modem-to-Netscape days, cites 4.4 billion users and mobile-driven growth, reveals the… | ||
| Pwototyping | Adam Argyle | 37m |
Claim: web pages built with Jamstack, a manifest.json, Workbox service workers and careful pre-rendering can first paint within 30ms and routinely fool users… | ||
| FOUC and the Death of Progressive Enhancement | Kyle Simpson | 01h 10m |
Argues progressive enhancement’s moral claim fails and names concrete problems: FOUC and flash of unstyled content, spinners and flash of unbe havior dent from… | ||
| Error handling: doing it right! | Ruben Bridgewater | 32m |
Shows concrete fixes: create a shared application Error class with user-facing subclasses and status codes, log everything, and let most errors bubble to a… | ||
| JSCAMP after party | Sala Bikini | 01m |
For the first time, we did an official gathering with all our attendees with a live concert by @EmpathyTest at Sala Bikini — Ever since the 1950s, it's one of… | ||
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