ReactJS Barcelona

19:00 Testing with confidence: crafting your React test strategy
Speaker: Yasminn Vaz, Senior Frontend Engineer @ Lodgify

Are you unsure whether to write a unit test, integration test, or end-to-end test? This presentation tackles that question head-on. We'll dive into the concept of test shapes and how to utilize them to inform a robust testing strategy.

19:30 Lint happens: Lessons Learned Migrating to ESLint 9
Speaker: Jordi López Galera, Senior software engineer at Dynatrace

In this talk, I’ll share the story of a recent migration project where I transitioned a legacy codebase to ESLint. What started as a simple upgrade quickly evolved into a thorough examination of outdated configurations, conflicting rules, and unexpected edge cases.

I’ll walk through the key challenges I faced—from dealing with custom linting setups to navigating team-wide rule alignment—and how I overcame them without derailing development velocity.

Whether you're considering an ESLint migration or already knee-deep in one, this talk will equip you with insights and actionable advice to make

19:45: Drinks and networking!
Do you want to talk at this meetup? Reach out to Dan Neciu on LinkedIn

And please help us spread the news and grow the community:

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Sponsors:
Dynatrace

Dynatrace keeps today’s AI-driven world running smoothly by advancing observability for modern digital businesses. The world relies on software, but what isn’t seen is just how much complexity goes on behind the scenes to make sure everything stays up and running. Most businesses today have extensive digital ecosystems comprising software, data flows, applications, and hybrid cloud environments. As these ecosystems grow in complexity, so do the points of failure.

Outages and glitches resulting in grounded flights or failed financial transactions prove how critical it is that software works as expected, making AI-powered observability an essential capability to ensure digital businesses run smoothly and recover quickly — keeping the world working.

Dynatrace provides businesses with a holistic view of their entire digital ecosystem, removing the burden of operational monitoring and alert management.

By automating these tasks, teams are empowered to transform complexity into their greatest asset and to drive their business forward by focusing on high-impact initiatives, driving topline acceleration, fueling innovation, and delivering experiences customers love.
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Join the 30-Day React Challenge for FREE!

- Master core hooks like `useState`, `useEffect`, and `useReducer`
- Unlock advanced hooks like `useTransition` and `useLayoutEffect`
- Learn powerful patterns like Compound Components to build flexible UIs
- Tackle tricky subjects like refs, context, and state management
- Get a peek into the future of React with experimental features
- Receive practical, real-world examples you can use immediately

Join here