Idiomatic ClojureScript interface to modern React.js

"Oh god, I just started learning reagent. Don’t tell me I’ll have to switch" /r/clojure

• API compatibility: React v18.2.0
• UIx v1 is in roman01la/uix repo
• Discuss at #uix on Clojurians Slack
• A slide deck explaining UIx and migration path from Reagent
• Try it out live in ClojureScript Studio

Installation

yarn add react@18.2.0 react-dom@18.2.0

{:deps {com.pitch/uix.core {:mvn/version "1.0.1"}
        com.pitch/uix.dom {:mvn/version "1.0.1"}}}

How to start a new project with UIx

• Run npx create-uix-app@latest my-app to scaffold a new project
• Clone starter template manually from pitch-io/uix-starter

Usage

(ns my.app
  (:require [uix.core :refer [defui $]]
            [uix.dom]))

(defui button [{:keys [on-click children]}]
  ($ :button.btn {:on-click on-click}
    children))

(defui app []
  (let [[state set-state!] (uix.core/use-state 0)]
    ($ :<>
      ($ button {:on-click #(set-state! dec)} "-")
      ($ :span state)
      ($ button {:on-click #(set-state! inc)} "+"))))

(defonce root
  (uix.dom/create-root (js/document.getElementById "root")))

(uix.dom/render-root ($ app) root)

Docs

• What is UIx?
• Components
• Elements
• Hooks
• State
• Effects
• Props validation
• Interop with React
• Interop with Reagent
• Code-splitting and React.lazy
• Migrating from Reagent
• Server-side rendering
• Hot reloading
• React DevTools
• Code linting
• Differences from Reagent
• Utilities
• Examples
• Internals
• Other render targets
  • React Native
  • React Three Fiber

Testing

scripts/test

Note: to ensure you're using the right Node.js version, you can use nvm and run nvm use once in the directory. Otherwise the Node.js version you use is in the .nvmrc file. See nvm repo for more documentation.

Publishing

1. Update version in core/release.edn, dom/release.edn and in README.md
2. Update docs if needed
3. Update CHANGELOG.md
4. Publish both core and dom packages to Clojars

cd core && CLOJARS_PASSWORD={YOUR_CLOJARS_TOKEN} clj -A:release --skip-tag
cd dom && CLOJARS_PASSWORD={YOUR_CLOJARS_TOKEN} clj -A:release --skip-tag

Who's using UIx2?

• Pitch
• Cognician
• Multiply
• ClojureScript Studio
• Ogres, virtual tabletop

Thanks to

• UIx v1 for initial set of ideas and learnings
• Helix for even more ideas
• Pitch for sponsoring and dogfooding the work