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timothypratleytimothypratley
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finalizing the sandwich
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‎src/scicloj/clay/uncompiled.cljs‎

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(ns scicloj.clay.uncompiled
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(:require [reagent.core :as r]
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[reagent.dom :as rdom]))
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(:require [reagent.dom :as rdom]))
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(rdom/render
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[:div "hello from Scittle"]
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[:div "Hello from a ClojureScript file (uncompiled.cljs)"]
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(js/document.getElementById "app"))

‎src/scicloj/clay/uncompiled.jpg‎

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‎src/scicloj/clay/uncompiled2.cljs‎

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(ns scicloj.clay.uncompiled2
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(:require [reagent.core :as r]
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[reagent.dom :as rdom]))
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(defonce app-state
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(r/atom {:style "scrambled"
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:eggs 2}))
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(defn cycle-style []
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(swap! app-state update :style
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{"scrambled" "fried"
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"fried" "poached"
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"poached" "scrambled"}))
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(defn add-egg []
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(swap! app-state update :eggs inc))
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(defn remove-egg []
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(swap! app-state update :eggs #(max 1 (dec %))))
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(defn breakfast-order []
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[:div.card.border-primary.mb-3 {:style {:max-width "30rem"}}
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[:div.card-header "Breakfast Order"]
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[:div.card-body
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[:div.mb-3
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[:label.form-label "Style: "
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[:strong (:style @app-state)]]
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[:div.d-grid.gap-2
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[:button.btn.btn-primary
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{:onClick cycle-style}
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"Change Style"]]]
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[:div.mb-3
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[:div
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[:label.form-label "Eggs:"]
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[:div.d-block.mb-2 (:eggs @app-state)]]
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[:div.btn-group
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[:button.btn.btn-secondary
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{:onClick remove-egg
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:disabled (= 1 (:eggs @app-state))}
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"−"]
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[:button.btn.btn-secondary
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{:onClick add-egg}
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"+"]]]
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[:div.text-muted
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(case (:style @app-state)
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"poached" "Water added for poaching..."
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"fried" "Turn n burn!"
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"scrambled" "Whisking away...")]]])
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(rdom/render
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[breakfast-order]
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(js/document.getElementById "app2"))

‎src/scicloj/clay/uncompiled_clojurescript.clj‎

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:quarto {:author :timothypratley
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:description "A lightweight way to cook with Clay and Scittle"
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:type :post
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:draft true
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:date "2025-08-13"
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:category :clay
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:tags [:clay :workflow :scittle :reagent]}}}
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;; Clay lets us interleave plain Hiccup with Reagent/Scittle components:
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(kind/hiccup
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[:div [:strong "Hello from Hiccup"]
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[:div [:strong "Hello from Hiccup (Clojure)"]
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['(fn []
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[:em "Hello from Scittle/Reagent"])]])
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[:em "Hello from Scittle/Reagent (ClojureScript)"])]])
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;; But because Clay serves HTML, re-evaluating this namespace normally reloads the whole page.
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;; Wouldn’t it be great to get a Figwheel/shadow-cljs style experience where code updates in place?
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;; ## A Taste Test
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;; Let's walk through a small example to see hot reload in action.
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;; I recommend copying these snippets into the `uncompiled.cljs` and saving as you go.
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;; I recommend copying these snippets into `uncompiled2.cljs` and saving as you go.
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;; First, we'll set up our ingredients (app state):
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;; ```clojure
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;; (ns my-app.core
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;; (:require [reagent.core :as r]))
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;; (ns scicloj.clay.uncompiled2
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;; (:require [reagent.core :as r]
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;; [reagent.dom :as rdom]))
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;;
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;; (defonce app-state ; <- defonce preserves state during reload
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;; (r/atom {:style "scrambled"
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;; [:h3 "Breakfast Order"]
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;; [:p "Style: " (:style @app-state)]
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;; [:p "Eggs: " (:eggs @app-state)]])
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;;
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;; (rdom/render
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;; [breakfast-order]
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;; (js/document.getElementById "app2"))
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;; ```
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;; We can mount our new component on the `app` div.
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;; We want to be able to change cooking styles.
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;; ```clojure
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;; (rdom/render
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;; [breakfast-order]
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;; (js/document.getElementById "app"))
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;; (defn cycle-style []
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;; (swap! app-state update :style
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;; {"scrambled" "fried"
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;; "fried" "poached"
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;; "poached" "scrambled"}))
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;; ```
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;; And while we're at it, let's add controls for the number of eggs:
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;; ```clojure
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;; (defn add-egg []
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;; (swap! app-state update :eggs inc))
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;; (defn remove-egg []
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;; (swap! app-state update :eggs #(max 1 (dec %))))
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;; ```
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;; Just like our opening story, imagine the order changes mid-cook.
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;; We can update our component without losing the current state:
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;; Now we can update our component to use these functions.
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;; ```clojure
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;; (defn breakfast-order []
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;; [:div
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;; [:h3 "Breakfast Order"]
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;; [:p "Style: " [:em (:style @app-state)]] ; <- added emphasis
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;; [:p "Eggs: " (:eggs @app-state)]
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;; [:small "Water added for poaching..."]]) ; <- new status line
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;; [:div
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;; [:p "Style: " [:strong (:style @app-state)]]
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;; [:button {:onClick cycle-style} "Change Style"]]
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;; [:div
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;; [:p "Eggs: " (:eggs @app-state)]
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;; [:button {:onClick remove-egg
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;; :disabled (= 1 (:eggs @app-state))} "−"]
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;; [:button {:onClick add-egg} "+"]]
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;; [:div
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;; (case (:style @app-state)
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;; "poached" "Water added for poaching..."
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;; "fried" "Turn n burn!"
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;; "scrambled" "Whisking away...")]])
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;; ```
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;; Save the file, and voilà! The display updates while preserving the
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;; existing order details in app-state. No need to start over or lose
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;; your place in the cooking process.
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;; If you are running this locally,
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;; notice how we keep the same state while adding new features.
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;; Each time we save the ClojureScript file,
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;; our app updates but keeps its current state.
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;; Here's the final result of our cooking:
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(kind/hiccup
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[:div#app2
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[:script {:type "application/x-scittle"
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:src "uncompiled2.cljs"}]])
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;; We replaced functions on the fly while our state lives on.
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;; The new code creates a fresh experience without losing where we were.
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;; Just like adding water to the pan.
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;; ## Why Go Light?
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;; A Michelin-star kitchen is a marvel of efficiency.
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;; Sous chefs prepping ingredients,
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;; line cooks at their stations, everything precisely mise en place.
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;; That's your typical ClojureScript setup: build tools, asset compilation,
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;; development servers, and careful configuration.
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;; That's your typical ClojureScript setup.
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;; Build tools, asset compilation, development servers, and careful configuration.
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;;
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;; But sometimes you just want to slap some cold cuts and cheese in a sandwich and start munching.
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;; That's Scittle: quick, simple, and satisfying.
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;; That's Scittle. Quick, simple, and satisfying.
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;; No waiting for the kitchen to warm up, no cleanup afterward.
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;; Just write some code and see it work.
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;; Write some code and see it work.
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;; ![Sandwich creation workspace](uncompiled.jpg)
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;; ## Chef's Notes
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;; Clay blends the traditional with the experimental.
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;; Write a namespace, get a webpage.
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;; Add some Scittle, get interactive components.
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;; The magic happens in how Clay handles changes:
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;; Magic happens when Clay handles changes:
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;; - For your narrative and page structure in Clojure live reload refreshes the whole view
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;; - For your Scittle components hot reload updates just the code, keeping state alive
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;; - For your narrative and page structure in Clojure, live reload refreshes the whole page
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;; - For your Scittle components, hot reload updates only the code, keeping state alive
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;; This is especially sweet when you're cooking up mini-games with MatterJS.
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;; Tweak physics parameters or game logic, and watch them take effect as soon as you save.
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;; This is especially sweet when you're cooking up interactive elements like mini-games
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;; with matter.js. Tweak physics parameters or game logic, and watch them take effect
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;; instantly. Your game state, scores, and position all preserved.
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;;
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;; Remember how we started with those poached eggs?
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;; Maybe they were destined for a sandwich all along.
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;; That's the beauty of this approach: start simple,
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;; stay flexible, and build exactly what you need.
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;; Clay lets you shape your story with markdown, spice it up with interactive widgets,
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;; That's the beauty of this approach.
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;; Start simple, stay flexible, and build what you need.
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;; Clay lets you shape your story with markdown,
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;; spice it up with interactive widgets,
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;; and adjust the ingredients.
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;; That's the kind of flow that keeps creative coding delicious.

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