Local-First Means Three Different Things

Author here. I've been designing a local-first data layer for most of this year, and I kept having the same conversation. I'd say "local-first" and people would hear ownership, or offline, or speed, depending on where they first ran into the word. So I wrote down where the three meanings come from and why they split. I also wanted to get to what local-first actually fixes, and in a web app that's mostly the waiting: spinners, "Saving...", hand-written optimistic updates, and the app that dies in a tunnel.

There are five demos in there too, one for each idea. Playing with them as you read is half the fun.