Vue FesJapan 2026
The main visual of Vue Fes Japan 2026. It features a silhouette of a V, representing Vue, and a circle, representing the Japanese flag, side by side. The colors are deep matcha-like shades derived from the two colors, and the circle features a Japanese gold marbling pattern.
OtemachiPlace Hall & Conference

Speaker

Wellness × hacomono Track
15:50 - 16:50

Rethinking Boundaries in the JavaScript Ecosystem

In recent years, tools in the JavaScript ecosystem have evolved beyond their traditional roles. As individual tools take on a broader range of responsibilities, the boundaries between them are becoming increasingly blurred.

How much should a single tool take on, and what should it leave to other tools or to standards? How can we reconcile preserving compatibility with creating unique value, and technical progress with sustaining an open ecosystem?

In this panel discussion, our panelists will explore where the JavaScript ecosystem stands today and where it may be headed next, through the lens of the boundaries between tools, between implementations and standards, and between projects and communities.

Leo Kettmeir

Rethinking Boundaries in the JavaScript Ecosystem

In recent years, tools in the JavaScript ecosystem have evolved beyond their traditional roles. As individual tools take on a broader range of responsibilities, the boundaries between them are becoming increasingly blurred.

How much should a single tool take on, and what should it leave to other tools or to standards? How can we reconcile preserving compatibility with creating unique value, and technical progress with sustaining an open ecosystem?

In this panel discussion, our panelists will explore where the JavaScript ecosystem stands today and where it may be headed next, through the lens of the boundaries between tools, between implementations and standards, and between projects and communities.

  • Denoland

Leo Kettmeir

I am a software engineer at Deno, where I've implemented key Web APIs—including WebSocket, WebGPU, and Web Storage—and contributed to core runtime features.

I focus on improving developer experience through tooling and documentation. Additionally, I am a maintainer to jsr.io, a modern alternative to npm, where I lead work on documentation tooling and registry infrastructure.

  • Denoland

Leo Kettmeir

I am a software engineer at Deno, where I've implemented key Web APIs—including WebSocket, WebGPU, and Web Storage—and contributed to core runtime features.

I focus on improving developer experience through tooling and documentation. Additionally, I am a maintainer to jsr.io, a modern alternative to npm, where I lead work on documentation tooling and registry infrastructure.