This story was originally published on HackerNoon at:
https://hackernoon.com/how-i-turned-a-404-error-into-a-zero-dependency-game-to-save-a-domain-migration.
How we turned a 404 error page into a zero-dependency JavaScript browser game to rescue lost traffic during a risky domain migration. Read the case study.
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The Problem: Even the best 301 redirect maps leak during a domain migration, sending valuable traffic to dead-end 404 pages.
The Solution: We engineered "404Brain", a zero-dependency, vanilla JavaScript game that renders in under 100ms right on the error route.
The Architecture: Built entirely with a single HTML