Cache-bust .sx files, optimize stepper back/hydration

Platform:
- sx-platform.js: extract ?v= query from script tag URL, append to
  all .sx file XHR requests. Prevents stale cached .sx files.

Stepper performance:
- do-back: use rebuild-preview (pure SX→DOM render) instead of
  replaying every do-step from 0. O(1) instead of O(n).
- Hydration effect: same rebuild-preview instead of step replay.
- Cookie save moved from do-step to button on-click handlers only.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-03-25 14:54:43 +00:00
parent 1a3ee40e0d
commit 0c8c0b6426
3 changed files with 715 additions and 18 deletions

View File

@@ -0,0 +1,346 @@
/**
* sx-platform.js — Browser platform layer for the SX WASM kernel.
*
* Registers the 8 FFI host primitives and loads web adapter .sx files.
* This is the only JS needed beyond the WASM kernel itself.
*
* Usage:
* <script src="sx_browser.bc.wasm.js"></script>
* <script src="sx-platform.js"></script>
*
* Or for js_of_ocaml mode:
* <script src="sx_browser.bc.js"></script>
* <script src="sx-platform.js"></script>
*/
(function() {
"use strict";
var K = globalThis.SxKernel;
if (!K) { console.error("[sx-platform] SxKernel not found"); return; }
// ================================================================
// 8 FFI Host Primitives
// ================================================================
K.registerNative("host-global", function(args) {
var name = args[0];
if (typeof globalThis !== "undefined" && name in globalThis) return globalThis[name];
if (typeof window !== "undefined" && name in window) return window[name];
return null;
});
K.registerNative("host-get", function(args) {
var obj = args[0], prop = args[1];
if (obj == null) return null;
var v = obj[prop];
return v === undefined ? null : v;
});
K.registerNative("host-set!", function(args) {
var obj = args[0], prop = args[1], val = args[2];
if (obj != null) obj[prop] = val;
});
K.registerNative("host-call", function(args) {
var obj = args[0], method = args[1];
var callArgs = [];
for (var i = 2; i < args.length; i++) callArgs.push(args[i]);
if (obj == null) {
// Global function call
var fn = typeof globalThis !== "undefined" ? globalThis[method] : window[method];
if (typeof fn === "function") return fn.apply(null, callArgs);
return null;
}
if (typeof obj[method] === "function") {
try { return obj[method].apply(obj, callArgs); }
catch(e) { console.error("[sx] host-call error:", e); return null; }
}
return null;
});
K.registerNative("host-new", function(args) {
var name = args[0];
var cArgs = args.slice(1);
var Ctor = typeof globalThis !== "undefined" ? globalThis[name] : window[name];
if (typeof Ctor !== "function") return null;
switch (cArgs.length) {
case 0: return new Ctor();
case 1: return new Ctor(cArgs[0]);
case 2: return new Ctor(cArgs[0], cArgs[1]);
case 3: return new Ctor(cArgs[0], cArgs[1], cArgs[2]);
default: return new Ctor(cArgs[0], cArgs[1], cArgs[2], cArgs[3]);
}
});
K.registerNative("host-callback", function(args) {
var fn = args[0];
// Native JS function — pass through
if (typeof fn === "function") return fn;
// SX callable (has __sx_handle) — wrap as JS function
if (fn && fn.__sx_handle !== undefined) {
return function() {
var a = Array.prototype.slice.call(arguments);
return K.callFn(fn, a);
};
}
return function() {};
});
K.registerNative("host-typeof", function(args) {
var obj = args[0];
if (obj == null) return "nil";
if (obj instanceof Element) return "element";
if (obj instanceof Text) return "text";
if (obj instanceof DocumentFragment) return "fragment";
if (obj instanceof Document) return "document";
if (obj instanceof Event) return "event";
if (obj instanceof Promise) return "promise";
if (obj instanceof AbortController) return "abort-controller";
return typeof obj;
});
K.registerNative("host-await", function(args) {
var promise = args[0], callback = args[1];
if (promise && typeof promise.then === "function") {
var cb;
if (typeof callback === "function") cb = callback;
else if (callback && callback.__sx_handle !== undefined)
cb = function(v) { return K.callFn(callback, [v]); };
else cb = function() {};
promise.then(cb);
}
});
// ================================================================
// Constants expected by .sx files
// ================================================================
K.eval('(define SX_VERSION "wasm-1.0")');
K.eval('(define SX_ENGINE "ocaml-vm-wasm")');
K.eval('(define parse sx-parse)');
K.eval('(define serialize sx-serialize)');
// ================================================================
// DOM query helpers used by boot.sx / orchestration.sx
// (These are JS-native in the transpiled bundle; here via FFI.)
// ================================================================
K.registerNative("query-sx-scripts", function(args) {
var root = (args[0] && args[0] !== null) ? args[0] : document;
if (typeof root.querySelectorAll !== "function") root = document;
return Array.prototype.slice.call(root.querySelectorAll('script[type="text/sx"]'));
});
K.registerNative("query-page-scripts", function(args) {
return Array.prototype.slice.call(document.querySelectorAll('script[type="text/sx-pages"]'));
});
K.registerNative("query-component-scripts", function(args) {
var root = (args[0] && args[0] !== null) ? args[0] : document;
if (typeof root.querySelectorAll !== "function") root = document;
return Array.prototype.slice.call(root.querySelectorAll('script[type="text/sx"][data-components]'));
});
// localStorage
K.registerNative("local-storage-get", function(args) {
try { var v = localStorage.getItem(args[0]); return v === null ? null : v; }
catch(e) { return null; }
});
K.registerNative("local-storage-set", function(args) {
try { localStorage.setItem(args[0], args[1]); } catch(e) {}
});
K.registerNative("local-storage-remove", function(args) {
try { localStorage.removeItem(args[0]); } catch(e) {}
});
// log-info/log-warn defined in browser.sx; log-error as native fallback
K.registerNative("log-error", function(args) { console.error.apply(console, ["[sx]"].concat(args)); });
// Cookie access (browser-side)
K.registerNative("get-cookie", function(args) {
var name = args[0];
var match = document.cookie.match(new RegExp('(?:^|; )' + name.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + '=([^;]*)'));
return match ? decodeURIComponent(match[1]) : null;
});
K.registerNative("set-cookie", function(args) {
document.cookie = args[0] + "=" + encodeURIComponent(args[1] || "") + ";path=/;max-age=31536000;SameSite=Lax";
});
// ================================================================
// Load SX web libraries and adapters
// ================================================================
// Load order follows dependency graph:
// 1. Core spec files (parser, render, primitives already compiled into WASM kernel)
// 2. Spec modules: signals, deps, router, page-helpers
// 3. Bytecode compiler + VM (for JIT in browser)
// 4. Web libraries: dom.sx, browser.sx (built on 8 FFI primitives)
// 5. Web adapters: adapter-html, adapter-sx, adapter-dom
// 6. Web framework: engine, orchestration, boot
var _baseUrl = "";
// Detect base URL from current script
var _cacheBust = "";
(function() {
if (typeof document !== "undefined") {
var scripts = document.getElementsByTagName("script");
for (var i = scripts.length - 1; i >= 0; i--) {
var src = scripts[i].src || "";
if (src.indexOf("sx-platform") !== -1) {
_baseUrl = src.substring(0, src.lastIndexOf("/") + 1);
var qi = src.indexOf("?");
if (qi !== -1) _cacheBust = src.substring(qi);
break;
}
}
}
})();
/**
* Load an .sx file synchronously via XHR (boot-time only).
* Returns the number of expressions loaded, or an error string.
*/
function loadSxFile(path) {
var url = _baseUrl + path + _cacheBust;
try {
var xhr = new XMLHttpRequest();
xhr.open("GET", url, false); // synchronous
xhr.send();
if (xhr.status === 200) {
var result = K.load(xhr.responseText);
if (typeof result === "string" && result.indexOf("Error") === 0) {
console.error("[sx-platform] FAIL " + path + ":", result);
return 0;
}
console.log("[sx-platform] ok " + path + " (" + result + " exprs)");
return result;
} else {
console.error("[sx] Failed to fetch " + path + ": HTTP " + xhr.status);
return null;
}
} catch(e) {
console.error("[sx] Failed to load " + path + ":", e);
return null;
}
}
/**
* Load all web adapter .sx files in dependency order.
* Called after the 8 FFI primitives are registered.
*/
function loadWebStack() {
var files = [
// Spec modules
"sx/render.sx",
"sx/signals.sx",
"sx/deps.sx",
"sx/router.sx",
"sx/page-helpers.sx",
// Freeze scope (signal persistence)
"sx/freeze.sx",
// Bytecode compiler + VM
"sx/bytecode.sx",
"sx/compiler.sx",
"sx/vm.sx",
// Web libraries (use 8 FFI primitives)
"sx/dom.sx",
"sx/browser.sx",
// Web adapters
"sx/adapter-html.sx",
"sx/adapter-sx.sx",
"sx/adapter-dom.sx",
// Boot helpers (platform functions in pure SX)
"sx/boot-helpers.sx",
// Web framework
"sx/engine.sx",
"sx/orchestration.sx",
"sx/boot.sx",
];
var loaded = 0;
for (var i = 0; i < files.length; i++) {
var r = loadSxFile(files[i]);
if (typeof r === "number") loaded += r;
}
console.log("[sx-platform] Loaded " + loaded + " expressions from " + files.length + " files");
return loaded;
}
// ================================================================
// Compatibility shim — expose Sx global matching current JS API
// ================================================================
globalThis.Sx = {
VERSION: "wasm-1.0",
parse: function(src) { return K.parse(src); },
eval: function(src) { return K.eval(src); },
load: function(src) { return K.load(src); },
renderToHtml: function(expr) { return K.renderToHtml(expr); },
callFn: function(fn, args) { return K.callFn(fn, args); },
engine: function() { return K.engine(); },
// Boot entry point (called by auto-init or manually)
init: function() {
if (typeof K.eval === "function") {
// Check boot-init exists
// Step through boot manually
console.log("[sx] init-css-tracking...");
K.eval("(init-css-tracking)");
console.log("[sx] process-page-scripts...");
K.eval("(process-page-scripts)");
console.log("[sx] routes after pages:", K.eval("(len _page-routes)"));
console.log("[sx] process-sx-scripts...");
K.eval("(process-sx-scripts nil)");
console.log("[sx] sx-hydrate-elements...");
K.eval("(sx-hydrate-elements nil)");
console.log("[sx] sx-hydrate-islands...");
K.eval("(sx-hydrate-islands nil)");
console.log("[sx] process-elements...");
K.eval("(process-elements nil)");
// Debug islands
console.log("[sx] ~home/stepper defined?", K.eval("(type-of ~home/stepper)"));
console.log("[sx] ~layouts/header defined?", K.eval("(type-of ~layouts/header)"));
// Try manual island query
console.log("[sx] manual island query:", K.eval("(len (dom-query-all (dom-body) \"[data-sx-island]\"))"));
// Try hydrating again
console.log("[sx] retry hydrate-islands...");
K.eval("(sx-hydrate-islands nil)");
// Check if links are boosted
var links = document.querySelectorAll("a[href]");
var boosted = 0;
for (var i = 0; i < links.length; i++) {
if (links[i]._sxBoundboost) boosted++;
}
console.log("[sx] boosted links:", boosted, "/", links.length);
// Check island state
var islands = document.querySelectorAll("[data-sx-island]");
console.log("[sx] islands:", islands.length);
for (var j = 0; j < islands.length; j++) {
console.log("[sx] island:", islands[j].getAttribute("data-sx-island"),
"hydrated:", !!islands[j]._sxBoundislandhydrated || !!islands[j]["_sxBound" + "island-hydrated"],
"children:", islands[j].children.length);
}
console.log("[sx] boot done");
}
}
};
// ================================================================
// Auto-init: load web stack and boot on DOMContentLoaded
// ================================================================
if (typeof document !== "undefined") {
var _doInit = function() {
loadWebStack();
Sx.init();
};
if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", _doInit);
} else {
_doInit();
}
}
})();

View File

@@ -0,0 +1,346 @@
/**
* sx-platform.js — Browser platform layer for the SX WASM kernel.
*
* Registers the 8 FFI host primitives and loads web adapter .sx files.
* This is the only JS needed beyond the WASM kernel itself.
*
* Usage:
* <script src="sx_browser.bc.wasm.js"></script>
* <script src="sx-platform.js"></script>
*
* Or for js_of_ocaml mode:
* <script src="sx_browser.bc.js"></script>
* <script src="sx-platform.js"></script>
*/
(function() {
"use strict";
var K = globalThis.SxKernel;
if (!K) { console.error("[sx-platform] SxKernel not found"); return; }
// ================================================================
// 8 FFI Host Primitives
// ================================================================
K.registerNative("host-global", function(args) {
var name = args[0];
if (typeof globalThis !== "undefined" && name in globalThis) return globalThis[name];
if (typeof window !== "undefined" && name in window) return window[name];
return null;
});
K.registerNative("host-get", function(args) {
var obj = args[0], prop = args[1];
if (obj == null) return null;
var v = obj[prop];
return v === undefined ? null : v;
});
K.registerNative("host-set!", function(args) {
var obj = args[0], prop = args[1], val = args[2];
if (obj != null) obj[prop] = val;
});
K.registerNative("host-call", function(args) {
var obj = args[0], method = args[1];
var callArgs = [];
for (var i = 2; i < args.length; i++) callArgs.push(args[i]);
if (obj == null) {
// Global function call
var fn = typeof globalThis !== "undefined" ? globalThis[method] : window[method];
if (typeof fn === "function") return fn.apply(null, callArgs);
return null;
}
if (typeof obj[method] === "function") {
try { return obj[method].apply(obj, callArgs); }
catch(e) { console.error("[sx] host-call error:", e); return null; }
}
return null;
});
K.registerNative("host-new", function(args) {
var name = args[0];
var cArgs = args.slice(1);
var Ctor = typeof globalThis !== "undefined" ? globalThis[name] : window[name];
if (typeof Ctor !== "function") return null;
switch (cArgs.length) {
case 0: return new Ctor();
case 1: return new Ctor(cArgs[0]);
case 2: return new Ctor(cArgs[0], cArgs[1]);
case 3: return new Ctor(cArgs[0], cArgs[1], cArgs[2]);
default: return new Ctor(cArgs[0], cArgs[1], cArgs[2], cArgs[3]);
}
});
K.registerNative("host-callback", function(args) {
var fn = args[0];
// Native JS function — pass through
if (typeof fn === "function") return fn;
// SX callable (has __sx_handle) — wrap as JS function
if (fn && fn.__sx_handle !== undefined) {
return function() {
var a = Array.prototype.slice.call(arguments);
return K.callFn(fn, a);
};
}
return function() {};
});
K.registerNative("host-typeof", function(args) {
var obj = args[0];
if (obj == null) return "nil";
if (obj instanceof Element) return "element";
if (obj instanceof Text) return "text";
if (obj instanceof DocumentFragment) return "fragment";
if (obj instanceof Document) return "document";
if (obj instanceof Event) return "event";
if (obj instanceof Promise) return "promise";
if (obj instanceof AbortController) return "abort-controller";
return typeof obj;
});
K.registerNative("host-await", function(args) {
var promise = args[0], callback = args[1];
if (promise && typeof promise.then === "function") {
var cb;
if (typeof callback === "function") cb = callback;
else if (callback && callback.__sx_handle !== undefined)
cb = function(v) { return K.callFn(callback, [v]); };
else cb = function() {};
promise.then(cb);
}
});
// ================================================================
// Constants expected by .sx files
// ================================================================
K.eval('(define SX_VERSION "wasm-1.0")');
K.eval('(define SX_ENGINE "ocaml-vm-wasm")');
K.eval('(define parse sx-parse)');
K.eval('(define serialize sx-serialize)');
// ================================================================
// DOM query helpers used by boot.sx / orchestration.sx
// (These are JS-native in the transpiled bundle; here via FFI.)
// ================================================================
K.registerNative("query-sx-scripts", function(args) {
var root = (args[0] && args[0] !== null) ? args[0] : document;
if (typeof root.querySelectorAll !== "function") root = document;
return Array.prototype.slice.call(root.querySelectorAll('script[type="text/sx"]'));
});
K.registerNative("query-page-scripts", function(args) {
return Array.prototype.slice.call(document.querySelectorAll('script[type="text/sx-pages"]'));
});
K.registerNative("query-component-scripts", function(args) {
var root = (args[0] && args[0] !== null) ? args[0] : document;
if (typeof root.querySelectorAll !== "function") root = document;
return Array.prototype.slice.call(root.querySelectorAll('script[type="text/sx"][data-components]'));
});
// localStorage
K.registerNative("local-storage-get", function(args) {
try { var v = localStorage.getItem(args[0]); return v === null ? null : v; }
catch(e) { return null; }
});
K.registerNative("local-storage-set", function(args) {
try { localStorage.setItem(args[0], args[1]); } catch(e) {}
});
K.registerNative("local-storage-remove", function(args) {
try { localStorage.removeItem(args[0]); } catch(e) {}
});
// log-info/log-warn defined in browser.sx; log-error as native fallback
K.registerNative("log-error", function(args) { console.error.apply(console, ["[sx]"].concat(args)); });
// Cookie access (browser-side)
K.registerNative("get-cookie", function(args) {
var name = args[0];
var match = document.cookie.match(new RegExp('(?:^|; )' + name.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + '=([^;]*)'));
return match ? decodeURIComponent(match[1]) : null;
});
K.registerNative("set-cookie", function(args) {
document.cookie = args[0] + "=" + encodeURIComponent(args[1] || "") + ";path=/;max-age=31536000;SameSite=Lax";
});
// ================================================================
// Load SX web libraries and adapters
// ================================================================
// Load order follows dependency graph:
// 1. Core spec files (parser, render, primitives already compiled into WASM kernel)
// 2. Spec modules: signals, deps, router, page-helpers
// 3. Bytecode compiler + VM (for JIT in browser)
// 4. Web libraries: dom.sx, browser.sx (built on 8 FFI primitives)
// 5. Web adapters: adapter-html, adapter-sx, adapter-dom
// 6. Web framework: engine, orchestration, boot
var _baseUrl = "";
// Detect base URL from current script
var _cacheBust = "";
(function() {
if (typeof document !== "undefined") {
var scripts = document.getElementsByTagName("script");
for (var i = scripts.length - 1; i >= 0; i--) {
var src = scripts[i].src || "";
if (src.indexOf("sx-platform") !== -1) {
_baseUrl = src.substring(0, src.lastIndexOf("/") + 1);
var qi = src.indexOf("?");
if (qi !== -1) _cacheBust = src.substring(qi);
break;
}
}
}
})();
/**
* Load an .sx file synchronously via XHR (boot-time only).
* Returns the number of expressions loaded, or an error string.
*/
function loadSxFile(path) {
var url = _baseUrl + path + _cacheBust;
try {
var xhr = new XMLHttpRequest();
xhr.open("GET", url, false); // synchronous
xhr.send();
if (xhr.status === 200) {
var result = K.load(xhr.responseText);
if (typeof result === "string" && result.indexOf("Error") === 0) {
console.error("[sx-platform] FAIL " + path + ":", result);
return 0;
}
console.log("[sx-platform] ok " + path + " (" + result + " exprs)");
return result;
} else {
console.error("[sx] Failed to fetch " + path + ": HTTP " + xhr.status);
return null;
}
} catch(e) {
console.error("[sx] Failed to load " + path + ":", e);
return null;
}
}
/**
* Load all web adapter .sx files in dependency order.
* Called after the 8 FFI primitives are registered.
*/
function loadWebStack() {
var files = [
// Spec modules
"sx/render.sx",
"sx/signals.sx",
"sx/deps.sx",
"sx/router.sx",
"sx/page-helpers.sx",
// Freeze scope (signal persistence)
"sx/freeze.sx",
// Bytecode compiler + VM
"sx/bytecode.sx",
"sx/compiler.sx",
"sx/vm.sx",
// Web libraries (use 8 FFI primitives)
"sx/dom.sx",
"sx/browser.sx",
// Web adapters
"sx/adapter-html.sx",
"sx/adapter-sx.sx",
"sx/adapter-dom.sx",
// Boot helpers (platform functions in pure SX)
"sx/boot-helpers.sx",
// Web framework
"sx/engine.sx",
"sx/orchestration.sx",
"sx/boot.sx",
];
var loaded = 0;
for (var i = 0; i < files.length; i++) {
var r = loadSxFile(files[i]);
if (typeof r === "number") loaded += r;
}
console.log("[sx-platform] Loaded " + loaded + " expressions from " + files.length + " files");
return loaded;
}
// ================================================================
// Compatibility shim — expose Sx global matching current JS API
// ================================================================
globalThis.Sx = {
VERSION: "wasm-1.0",
parse: function(src) { return K.parse(src); },
eval: function(src) { return K.eval(src); },
load: function(src) { return K.load(src); },
renderToHtml: function(expr) { return K.renderToHtml(expr); },
callFn: function(fn, args) { return K.callFn(fn, args); },
engine: function() { return K.engine(); },
// Boot entry point (called by auto-init or manually)
init: function() {
if (typeof K.eval === "function") {
// Check boot-init exists
// Step through boot manually
console.log("[sx] init-css-tracking...");
K.eval("(init-css-tracking)");
console.log("[sx] process-page-scripts...");
K.eval("(process-page-scripts)");
console.log("[sx] routes after pages:", K.eval("(len _page-routes)"));
console.log("[sx] process-sx-scripts...");
K.eval("(process-sx-scripts nil)");
console.log("[sx] sx-hydrate-elements...");
K.eval("(sx-hydrate-elements nil)");
console.log("[sx] sx-hydrate-islands...");
K.eval("(sx-hydrate-islands nil)");
console.log("[sx] process-elements...");
K.eval("(process-elements nil)");
// Debug islands
console.log("[sx] ~home/stepper defined?", K.eval("(type-of ~home/stepper)"));
console.log("[sx] ~layouts/header defined?", K.eval("(type-of ~layouts/header)"));
// Try manual island query
console.log("[sx] manual island query:", K.eval("(len (dom-query-all (dom-body) \"[data-sx-island]\"))"));
// Try hydrating again
console.log("[sx] retry hydrate-islands...");
K.eval("(sx-hydrate-islands nil)");
// Check if links are boosted
var links = document.querySelectorAll("a[href]");
var boosted = 0;
for (var i = 0; i < links.length; i++) {
if (links[i]._sxBoundboost) boosted++;
}
console.log("[sx] boosted links:", boosted, "/", links.length);
// Check island state
var islands = document.querySelectorAll("[data-sx-island]");
console.log("[sx] islands:", islands.length);
for (var j = 0; j < islands.length; j++) {
console.log("[sx] island:", islands[j].getAttribute("data-sx-island"),
"hydrated:", !!islands[j]._sxBoundislandhydrated || !!islands[j]["_sxBound" + "island-hydrated"],
"children:", islands[j].children.length);
}
console.log("[sx] boot done");
}
}
};
// ================================================================
// Auto-init: load web stack and boot on DOMContentLoaded
// ================================================================
if (typeof document !== "undefined") {
var _doInit = function() {
loadWebStack();
Sx.init();
};
if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", _doInit);
} else {
_doInit();
}
}
})();

View File

@@ -219,17 +219,24 @@
;; Component expressions handled by lake's reactive render
nil))
(swap! step-idx inc)
(update-code-highlight)
(set-cookie "sx-home-stepper" (freeze-to-sx "home-stepper")))))
(update-code-highlight)))))
(rebuild-preview (fn (target)
;; Rebuild preview DOM directly from steps, without replaying do-step
(let ((container (get-preview)))
(when container
(dom-set-prop container "innerHTML" "")
(let ((expr (steps-to-preview (deref steps) target)))
(when expr
(let ((rendered (render-to-dom expr (get-render-env nil) nil)))
(when rendered (dom-append container rendered)))))
(set-stack (list container))))))
(do-back (fn ()
(when (> (deref step-idx) 0)
(let ((target (- (deref step-idx) 1))
(container (get-preview)))
(when container (dom-set-prop container "innerHTML" ""))
(set-stack (list (get-preview)))
(reset! step-idx 0)
(for-each (fn (_) (do-step)) (slice (deref steps) 0 target))
(set-cookie "sx-home-stepper" (freeze-to-sx "home-stepper")))))))
(let ((target (- (deref step-idx) 1)))
(rebuild-preview target)
(reset! step-idx target)
(update-code-highlight)
(set-cookie "sx-home-stepper" (freeze-to-sx "home-stepper"))))))))
;; Freeze scope for persistence — same mechanism, cookie storage
(freeze-scope "home-stepper" (fn ()
(freeze-signal "step" step-idx)))
@@ -254,13 +261,7 @@
(let ((_eff (effect (fn ()
(schedule-idle (fn ()
(build-code-dom)
(let ((preview (get-preview)))
(when preview (dom-set-prop preview "innerHTML" "")))
(batch (fn ()
(let ((target (deref step-idx)))
(reset! step-idx 0)
(set-stack (list (get-preview)))
(for-each (fn (_) (do-step)) (slice (deref steps) 0 target)))))
(rebuild-preview (deref step-idx))
(update-code-highlight)
(run-post-render-hooks)))))))
(div :class "space-y-4"
@@ -282,7 +283,9 @@
(deref code-tokens)))
;; Controls
(div :class "flex items-center justify-center gap-2 md:gap-3"
(button :on-click (fn (e) (do-back))
(button :on-click (fn (e)
(do-back)
(set-cookie "sx-home-stepper" (freeze-to-sx "home-stepper")))
:class (str "px-2 py-1 rounded text-3xl "
(if (> (deref step-idx) 0)
"text-stone-600 hover:text-stone-800 hover:bg-stone-100"
@@ -290,7 +293,9 @@
"\u25c0")
(span :class "text-sm text-stone-500 font-mono tabular-nums"
(deref step-idx) " / " (len (deref steps)))
(button :on-click (fn (e) (do-step))
(button :on-click (fn (e)
(do-step)
(set-cookie "sx-home-stepper" (freeze-to-sx "home-stepper")))
:class (str "px-2 py-1 rounded text-3xl "
(if (< (deref step-idx) (len (deref steps)))
"text-violet-600 hover:text-violet-800 hover:bg-violet-50"