re-frame2

Alpha. But it works.

re-frame2 is a pattern for building Single Page Apps on a virtual-DOM substrate — React, in practice. You build with Reagent v2, Reagent-slim (a Reagent rewrite that knows about re-frame2), UIx, or Helix. Production apps can be built on it today.

What's novel

Views are derivative, not central. Events update centralised state. Subscriptions derive data. Views sit at the end as render functions over reactive inputs. No useState, no useEffect, no "lifting state up" — state was never down there in the first place. Your app is a small virtual machine; handlers are the instruction set; events are the program.

Tooling is first-class. The runtime is a predictable pipeline with a single deeply integrated trace bus. Devtools, AI pair-programmers, story tools, test harnesses — they all attach to one surface and get the whole picture for free. Source-coord stamping on every handler and DOM element gives click-to-source from any panel.

Your language of choice should be Turing complete; your architecture shouldn't be.