> Markdown version of [/videos?page=62](https://www.wearedevelopers.com/videos?page=62). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Videos 2223 videos · 24118 moments · 1245.7 hours of content ## All videos ### The 2025 State of JavaScript Testing Is Jest officially dead? Discover why Vitest and Playwright dominate the 2025 testing landscape, and how AI-powered, self-healing tests are finally eliminating flaky CI pipelines. - **Speakers:** Daniel Afonso - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 28:33 - [Watch](https://www.wearedevelopers.com/videos/1678-the-2025-state-of-javascript-testing) ### Building a framework-independent component library Ditch endless UI rewrites and break free from framework lock-in. Build a resilient, framework-independent component library using native browser APIs and Lit. - **Speakers:** Tobias Scholz - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 19:46 - [Watch](https://www.wearedevelopers.com/videos/1679-building-a-framework-independent-component-library) ### Advanced Micro Frontends: Multi-Version and Multi-Framework Scenarios True frontend autonomy requires mastering the chaos of conflicting frameworks. Discover how combining Module Federation with Web Components resolves multi-version mismatches without sacrificing developer velocity. - **Speakers:** Manfred Steyer - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 24:47 - [Watch](https://www.wearedevelopers.com/videos/1677-advanced-micro-frontends-multi-version-and-multi-framework-scenarios) ### API = Some REST and HTTP, right? RIGHT?! Building robust REST APIs requires far more than just returning JSON. Master advanced versioning strategies, correct status codes, and OpenAPI contracts to bulletproof your enterprise architectures. - **Speakers:** Rustam Mehmandarov - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 27:25 - [Watch](https://www.wearedevelopers.com/videos/1675-api-some-rest-and-http-right-right) ### HTTP headers that make your website go faster Stop overloading your origin servers with redundant data payloads. Mastering HTTP caching headers unlocks precise bandwidth control and instantly accelerates your website's performance. - **Speakers:** Thijs Feryn - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 30:27 - [Watch](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster) ### Multithreading in Javascript: A guide to Web Workers Is JavaScript actually single-threaded? Discover how Web Workers unlock true parallelism to offload heavy CPU tasks and guarantee smooth 60 FPS interfaces. - **Speakers:** Dani Coll - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 23:14 - [Watch](https://www.wearedevelopers.com/videos/1673-multithreading-in-javascript-a-guide-to-web-workers) ### Semantic HTML means it's semantic, right? Right? Semantic HTML doesn't guarantee an accessible experience. Discover why screen readers silently ignore your perfectly nested tags, and how to properly audit your accessibility tree. - **Speakers:** Emma Dawson - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 23:13 - [Watch](https://www.wearedevelopers.com/videos/1674-semantic-html-means-it-s-semantic-right-right) ### Oh S***! There's a New Accessibility Law and I'm Not Ready! Overwhelmed by the European Accessibility Act? Unplug your mouse to instantly uncover severe UX traps. Conquer massive accessibility debt one logical step at a time. - **Speakers:** Emma Dawson - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 24:30 - [Watch](https://www.wearedevelopers.com/videos/1671-oh-s-there-s-a-new-accessibility-law-and-i-m-not-ready) ### Your Testing Strategy is broken - lets fix it! Are your green builds masking a broken testing strategy? Stop chasing vanity metrics and learn how example mapping and behavior-driven development can build true software confidence. - **Speakers:** Luise Freese - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 28:12 - [Watch](https://www.wearedevelopers.com/videos/1672-your-testing-strategy-is-broken-lets-fix-it) ### Marko.js: Unsung Hero of Scalable Web Frameworks Battle-tested by eBay since 2014, Marko.js quietly pioneered modern frontend architecture. Discover why this server-first framework processes requests twice as fast as React. - **Speakers:** Eugene Fidelin - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 16:57 - [Watch](https://www.wearedevelopers.com/videos/1669-marko-js-unsung-hero-of-scalable-web-frameworks) ### The Journey of a Pixel in a React Application Stop treating React like a performance black box. Uncover the exact end-to-end journey of a rendered pixel to finally diagnose and fix your hardest frontend bugs. - **Speakers:** Shem Magnezi - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 27:01 - [Watch](https://www.wearedevelopers.com/videos/1667-the-journey-of-a-pixel-in-a-react-application) ### How to add test automation to your project: The good, the bad, and the ugly Test automation is not a spare-time activity. Discover how to avoid hidden implementation traps, align tools with team skills, and treat test scripts as first-class code. - **Speakers:** Augustin Gottlieb - **Event:** World Congress 2025 - **Published:** August 20, 2025 - **Duration:** 26:20 - [Watch](https://www.wearedevelopers.com/videos/1668-how-to-add-test-automation-to-your-project-the-good-the-bad-and-the-ugly) [Next page](https://www.wearedevelopers.com/videos?page=63)