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Fix thunk handling for island SSR + effect no-op on server

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- trampoline resolves Thunk values (sf-letrec returns them for TCO)
- render-to-html handles "thunk" type by unwrapping expr+env
- effect overridden to no-op after loading signals.sx (prevents
  reactive loops during SSR — effects are DOM side-effects)
- Added thunk?/thunk-expr/thunk-env primitives
- Added DOM API stubs for SSR (dom-query, schedule-idle, etc.)

Header island renders fully with styling. Stepper island still
fails SSR (letrec + complex body hits "Undefined symbol: div"
in eval path — render mode not active during CEK letrec eval).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-03-23 15:31:58 +00:00
parent f3c0cbd8e2
commit f4610e1799
4 changed files with 33 additions and 4 deletions
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6
shared/static/scripts/sx-browser.js
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@@ -14,7 +14,7 @@
// =========================================================================
var NIL = Object.freeze({ _nil: true, toString: function() { return "nil"; } });
var SX_VERSION = "2026-03-23T13:21:57Z";
var SX_VERSION = "2026-03-23T15:29:13Z";
function isNil(x) { return x === NIL || x === null || x === undefined; }
function isSxTruthy(x) { return x !== false && !isNil(x); }
@@ -2456,11 +2456,11 @@ PRIMITIVES["serialize"] = serialize;
// render-to-html
var renderToHtml = function(expr, env) { setRenderActiveB(true);
return (function() { var _m = typeOf(expr); if (_m == "nil") return ""; if (_m == "string") return escapeHtml(expr); if (_m == "number") return (String(expr)); if (_m == "boolean") return (isSxTruthy(expr) ? "true" : "false"); if (_m == "list") return (isSxTruthy(isEmpty(expr)) ? "" : renderListToHtml(expr, env)); if (_m == "symbol") return renderValueToHtml(trampoline(evalExpr(expr, env)), env); if (_m == "keyword") return escapeHtml(keywordName(expr)); if (_m == "raw-html") return rawHtmlContent(expr); if (_m == "spread") return (sxEmit("element-attrs", spreadAttrs(expr)), ""); return renderValueToHtml(trampoline(evalExpr(expr, env)), env); })(); };
return (function() { var _m = typeOf(expr); if (_m == "nil") return ""; if (_m == "string") return escapeHtml(expr); if (_m == "number") return (String(expr)); if (_m == "boolean") return (isSxTruthy(expr) ? "true" : "false"); if (_m == "list") return (isSxTruthy(isEmpty(expr)) ? "" : renderListToHtml(expr, env)); if (_m == "symbol") return renderValueToHtml(trampoline(evalExpr(expr, env)), env); if (_m == "keyword") return escapeHtml(keywordName(expr)); if (_m == "raw-html") return rawHtmlContent(expr); if (_m == "spread") return (sxEmit("element-attrs", spreadAttrs(expr)), ""); if (_m == "thunk") return renderToHtml(thunkExpr(expr), thunkEnv(expr)); return renderValueToHtml(trampoline(evalExpr(expr, env)), env); })(); };
PRIMITIVES["render-to-html"] = renderToHtml;
// render-value-to-html
var renderValueToHtml = function(val, env) { return (function() { var _m = typeOf(val); if (_m == "nil") return ""; if (_m == "string") return escapeHtml(val); if (_m == "number") return (String(val)); if (_m == "boolean") return (isSxTruthy(val) ? "true" : "false"); if (_m == "list") return renderListToHtml(val, env); if (_m == "raw-html") return rawHtmlContent(val); if (_m == "spread") return (sxEmit("element-attrs", spreadAttrs(val)), ""); return escapeHtml((String(val))); })(); };
var renderValueToHtml = function(val, env) { return (function() { var _m = typeOf(val); if (_m == "nil") return ""; if (_m == "string") return escapeHtml(val); if (_m == "number") return (String(val)); if (_m == "boolean") return (isSxTruthy(val) ? "true" : "false"); if (_m == "list") return renderListToHtml(val, env); if (_m == "raw-html") return rawHtmlContent(val); if (_m == "spread") return (sxEmit("element-attrs", spreadAttrs(val)), ""); if (_m == "thunk") return renderToHtml(thunkExpr(val), thunkEnv(val)); return escapeHtml((String(val))); })(); };
PRIMITIVES["render-value-to-html"] = renderValueToHtml;
// RENDER_HTML_FORMS