initial jsx support

deno.json

@@ -2,6 +2,9 @@
   "tasks": {
     "dev": "deno run --allow-net src/main.ts"
   },
+  "imports": {
+    "interest/jsx-runtime": "./src/jsx.ts"
+  },
   "lint": {
     "rules": {
       "tags": [
@@ -11,14 +14,13 @@
     }
   },
   "compilerOptions": {
+    "jsx": "react-jsx",
+    "jsxImportSource": "interest",
     "lib": [
       "deno.ns",
       "esnext",
       "dom",
       "dom.iterable"
     ]
-  },
-  "imports": {
-    "@std/assert": "jsr:@std/assert@1"
   }
 }

deno.lock

@@ -1,20 +1,5 @@
 {
   "version": "5",
-  "specifiers": {
-    "jsr:@std/assert@1": "1.0.15",
-    "jsr:@std/internal@^1.0.12": "1.0.12"
-  },
-  "jsr": {
-    "@std/assert@1.0.15": {
-      "integrity": "d64018e951dbdfab9777335ecdb000c0b4e3df036984083be219ce5941e4703b",
-      "dependencies": [
-        "jsr:@std/internal"
-      ]
-    },
-    "@std/internal@1.0.12": {
-      "integrity": "972a634fd5bc34b242024402972cd5143eac68d8dffaca5eaa4dba30ce17b027"
-    }
-  },
   "redirects": {
     "https://deno.land/std/fs/walk.ts": "https://deno.land/std@0.224.0/fs/walk.ts"
   },
@@ -46,10 +31,5 @@
     "https://deno.land/std@0.224.0/path/windows/from_file_url.ts": "ced2d587b6dff18f963f269d745c4a599cf82b0c4007356bd957cb4cb52efc01",
     "https://deno.land/std@0.224.0/path/windows/join.ts": "8d03530ab89195185103b7da9dfc6327af13eabdcd44c7c63e42e27808f50ecf",
     "https://deno.land/std@0.224.0/path/windows/normalize.ts": "78126170ab917f0ca355a9af9e65ad6bfa5be14d574c5fb09bb1920f52577780"
-  },
-  "workspace": {
-    "dependencies": [
-      "jsr:@std/assert@1"
-    ]
   }
 }

src/app.tsx

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) 2025 xwra
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+export default function App() {
+  return (
+    <>
+      <h1>JSX Page</h1>
+      <p class="oh hey">meowing chunk by chunk</p>
+    </>
+  );
+}

src/global.d.ts

@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) 2025 xwra
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+/// <reference types="interest/jsx-runtime" />
+
+import type { ChunkedStream } from "./stream.ts";
+
+declare global {
+  namespace JSX {
+    type Element = (chunks: ChunkedStream<string>) => Promise<void>;
+    interface IntrinsicElements {
+      [key: string]: ElementProps;
+    }
+    interface ElementProps {
+      [key: string]: any;
+    }
+  }
+}

src/html.ts

@@ -71,9 +71,9 @@ type TagFn = {
   (fn: () => any): TagRes;
 };
 
-type HtmlProxy = { [K in keyof HTMLElementTagNameMap]: TagFn } & {
+export type HtmlProxy = { [K in keyof HTMLElementTagNameMap]: TagFn } & {
   [key: string]: TagFn;
-};
+} & { render(child: any): Promise<void> };
 
 const isTemplateLiteral = (arg: any): arg is TemplateStringsArray =>
   Array.isArray(arg) && "raw" in arg;
@@ -125,5 +125,8 @@ export function html(
     },
   };
 
-  return new Proxy({}, handler) as HtmlProxy;
+  const proxy = new Proxy({}, handler) as HtmlProxy;
+  proxy.render = async (stuff: any) => void write(await render(stuff));
+
+  return proxy;
 }

src/jsx.ts

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2025 xwra
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { html, type HtmlProxy } from "./html.ts";
+import { ChunkedStream } from "./stream.ts";
+
+let context;
+
+export function jsx(
+  tag: string | typeof Fragment,
+  { children }: Record<string, any> = {},
+) {
+  return async (chunks: ChunkedStream<string>) => {
+    if (tag === Fragment) {
+      context = html(chunks);
+      for (const child of children) {
+        await context.render?.(child);
+      }
+      return;
+    }
+    await (context ||= html(chunks))[tag](...children);
+  };
+}
+
+export const Fragment = Symbol("Fragment");
+
+export const jsxs = jsx;

src/main.ts

@@ -5,18 +5,18 @@
 
 import { html } from "./html.ts";
 import { createHtmlStream } from "./http.ts";
+import App from "./app.tsx";
 
 Deno.serve({
   port: 8080,
   async handler() {
     const stream = await createHtmlStream({ lang: "en" });
-    const { h1, ol, p, li } = html(stream.chunks);
+    const { ol, li } = html(stream.chunks);
 
-    await h1`Normal Streaming Page`;
-    await p({ class: "oh hey" }, "meowing chunk by chunk");
+    await App()(stream.chunks);
 
     ol(async () => {
-      const fruits = ["Apple", "Banana", "Cherry"];
+      const fruits = ["TSX support", "Apple", "Banana", "Cherry"];
       for (const fruit of fruits) {
         await new Promise((r) => setTimeout(r, 500));
         await li(fruit);