I gave a talk at BuriKaigi 2026 with the title "Building 'Feel-Good UI' with React 19 — A Case for Optimistic Updates"
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Introduction
Hello, I'm Morishige from Classmethod's Manufacturing Business Technology Department.
On January 9, 2026, I gave a presentation titled "Creating a 'Feel-Good UI' with React 19 — The Case for Optimistic Updates" at BuriKaigi 2026, held in Toyama Prefecture.
Materials
Presentation Overview
I presented about two "gentle lies" for creating a "feel-good UI."
- Optimistic UI: A lie that makes slow processes "look fast" (likes, chat submissions, etc.)
- Artificial Delay: A lie that makes fast processes "look heavier" (AI analysis, security checks, etc.)
I introduced implementation patterns using React 19's useOptimistic hook, along with the psychological background of Labor Illusion.
Our job is not to make processing faster, but to align response time with "user expectations."
Impressions
This was my first time attending BuriKaigi, and there was a warm atmosphere where not only the staff but also all the attendees were building the conference together.
And above all, Toyama's cuisine, including its fresh seafood, is truly appealing.
Our colleague Sato also gave a presentation on "Practices for Using Claude Code Safely as a Team." Please check that out as well.