Highlights of Virtual JS Days 2025

We’re thrilled to share a recap of JS Days 2025, our premier virtual JavaScript event, which successfully concluded from August 19–21, 2025. This three-day conference brought together over 5000 JavaScript professionals, developers, and tech leaders from across the globe, immersing them in discussions around cutting-edge frameworks, enterprise-grade tools, and innovations in modern UI development.

For those who joined us and for those who couldn’t, here’s a brief summary of the key learnings and insights from each day’s recorded sessions, with a particular in-depth look at the ReExt integration session.

Day – 1 Talks

Day one, held on August 19, 2025, kicked off with a forward-looking perspective on the JavaScript landscape. Sean Duffy’s keynote set an inspiring tone, exploring the evolving direction of JavaScript, hinting at upcoming paradigms and the expanding capabilities of the language

Marc Gusmano, a sales engineer with Sencha, presented a detailed session on ReExt, one of Sencha’s newest products. ReExt is defined as a React library that exposes Ext JS components as native React components, allowing for their seamless integration into React applications.

The core philosophy of ReExt is its simplicity, centered around a single reext component that utilises five specific props and a set of event props:

ReExt is available as an npm package, npm install @sencha/reext, with comprehensive documentation for getting started. The session’s primary purpose was to demonstrate how to reuse existing Ext JS applications and custom components in React without rewriting them.

Next session by eyeworkers GmbH delved into the state of Micro-Frontends in 2025, illustrating best practices for constructing highly modular and scalable user interfaces, a crucial approach for complex enterprise applications.

Wemerson Januario provided a tangible example of Ext JS in action, showcasing a recipe app case study that highlighted the framework’s capabilities for rapid application development.

Day – 2 Talks

The second day, August 20, 2025, shifted focus towards the transformative power of Artificial Intelligence within JavaScript development and strategies for enhancing development efficiency.

Bhuvan Pasham’s session explored the critical topic of JavaScript’s role in the age of AI, discussing how developers can adapt their skills and innovate to leverage AI technologies effectively within their projects.

Andres Villalba presented an exciting integration, demonstrating how ChatGPT can be used to enable natural language search within Ext JS grids, offering a more intuitive and powerful user experience for data exploration.

Rafael Méndez showcased the power of low-code development with Sencha, illustrating how a drag-and-drop interface can significantly accelerate the deployment of applications, making development more accessible and faster.

Bryan Frankel offered valuable insights into the strategic business process behind selecting the right development tools, a crucial consideration for organisations aiming for long-term success and efficiency.

Day – 3 Talks

The final day, August 21, 2025, brought to light real-time application development, advanced AI integrations, and a deep dive into core framework mechanics, culminating in an engaging Q&A.

Pavel Perminov introduced Indi Engine AI, demonstrating its capabilities in building advanced, real-time, multi-window Ext JS applications powered by AI prompts, pushing the boundaries of interactive application design.

Andres Villalba returned to present a compelling use case: real-time map tracking utilising Ext JS and Node.js, showcasing how these technologies can be combined to create dynamic and responsive location-based services.

For those looking to deepen their technical expertise, Felipe da Cunha Bueno’s session on mastering Ext JS Data Store Internals provided a comprehensive look under the hood, offering invaluable knowledge for optimising data handling.

The event concluded with an interactive “Ask Me Anything” session joined by a team of Sencha product, sales engineering, and MVPs, covering a wide range of topics related to Ext JS, ReExt, and the future trajectory of these technologies, allowing attendees to directly engage with an expert.

JS Days 2025 was a resounding success, providing a platform for unparalleled learning and networking within the global JavaScript community. The diverse range of topics, from cutting-edge AI integrations to foundational framework insights and practical component reuse strategies like ReExt, underscored the dynamic and ever-evolving nature of JavaScript development.

We extend our sincere gratitude to all speakers, attendees, and partners who contributed to making this event truly memorable. We look forward to continuing to explore the innovations in modern UI development and beyond!

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