Datastar and Hypermedia

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Sep 9, 2025

Delaney shares his fascinating journey from 3D artist to developer, driven by a passion for real-time web visualization. The conversation dives into the innovative DataStar framework, highlighting its efficiency with Server-Sent Events over traditional polling. Delaney also discusses the challenges of WebSockets and introduces upcoming projects like DarkStar for low-latency gaming. He emphasizes the importance of simplicity in programming and community engagement, advocating for practical solutions that address real user problems.

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INSIGHT

Hypermedia Over SPA State

Delaney criticizes modern SPA approaches and promotes hypermedia as a backend-driven UI where links determine available actions.
This reduces duplicate validation and keeps authoritative state on the server for safer, simpler apps.

INSIGHT

Stream HTML, Not JSON Polls

Sending HTML fragments and using SSE avoids JSON+JS conversion and reduces RTT by eliminating frequent polling.
Datastar streams compressed HTML updates to achieve microsecond-level interactivity with far less bandwidth.

ADVICE

Use Native Compression Correctly

Rely on the browser's built-in compression (Accept-Encoding) and keep the SSE response window open for large compression gains.
Configure server compression windows and flush behavior to avoid buffering delays for real-time streams.

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Episode 4 – Datastar and Hypermedia.

In this episode, Glen interviews Delaney, the creator of DataStar, a lightweight framework designed for building real-time collaborative web applications. Delaney shares his journey from being a 3D artist to a developer, emphasizing the importance of hypermedia and real-time visualization. The conversation delves into the efficiency of DataStar, its use of Server-Sent Events (SSE), and the framework's potential for collaborative web experiences. Delaney also discusses the challenges of WebSockets and introduces future projects like DarkStar, aimed at enhancing networking capabilities. Overall, the episode highlights the transformative potential of DataStar in modern web development. In this conversation, Delaney discusses the intricacies of DataStar, a real-time system for handling large volumes of messages. He emphasizes the importance of simplicity in programming, the significance of measuring performance, and the role of abstraction in software development. Delaney also explains the core functions of DataStar, including patch elements and signals, and how they facilitate real-time interactivity. The discussion touches on offline support, the growth of the DataStar community, and the non-profit model that supports its development. Delaney encourages developers to engage with the community and emphasizes the importance of building solutions to real problems.

Learn more about Datastar and Hypermedia:

https://data-star.dev/
https://data-star.dev/reference/datastar_pro
https://hypermedia.systems/

Rama

If you like this podcast you might also like our modular network framework in Rust: https://ramaproxy.org

Chapters

00:00 Intro
00:42 Delaney and his background
02:39 The Evolution of Hypermedia and Real-Time Systems
06:27 SSE and Compression
15:33 The Social Web
23:01 Why use datastar?
29:42 Web Transport and Darkstar
33:55 DataStar and Future Directions
46:04 Understanding Abstraction in Programming
50:19 DataStar: Key Functions and Concepts
53:27 Signals in DataStar: When to Use Them
57:25 Front-End Validation and User Experience
59:27 Offline Support and Web Applications
01:02:56 The Growth of DataStar and Community Engagement
01:07:09 The Challenges of Web Development
01:09:26 AI and Its Role in Development
01:13:22 DataStar and WebTransport: Future Directions
01:16:33 Dynamic Content and DataStar's Use Cases
01:18:35 Funding and Sustainability of Open Source Projects
01:31:02 Outro

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Music for this episode was composed by Dj Mailbox. Listen to his music at https://on.soundcloud.com/4MRyPSNj8FZoVGpytj.