Use JSX as view engine in Oak

Question

I'm trying to create a simple html page with Deno and Oak.
As view engine I like to use JSX to generate the actual html.
Here is a simple example, but this fails because JSX is converted to React.createElement and React is not available.

But do I need to import the full React library now? Is that even possible?
(I don't need hooks)

import { Application } from "https://deno.land/x/[email protected]/mod.ts";
import page from "./page.jsx";

const app = new Application();

app.use((ctx) => {
  ctx.response.body = page();
});

await app.listen({ port: 8000 });

page.jsx

export default function() {
    return(<div>TEST</div>)
}

Answer 1

I solved it like this:

deps.ts

export { Application } from "https://deno.land/x/[email protected]/mod.ts";
export { h } from "https://cdn.skypack.dev/preact";
export { render } from "https://cdn.skypack.dev/[email protected]";

home.jsx

/** @jsx h */
import {h} from './deps.ts';

export default function () {
    return <div>TEST</div>
}   

The JSX pragma is to replace React with h (hyperscript).
You can also use a tsconfig.json like below:

{
    "compilerOptions": {
        "jsxFactory": "h",
    }
}

You have to load it like this: deno run --config ./tsconfig.json ...

server.js

import { Application, render } from "./deps.ts";
import home from "./home.jsx";

const app = new Application();

const respond = function (ctx, vdom) {
  ctx.response.type = "html";
  ctx.response.body = render(vdom(), {}, {pretty: true});
};

app.use((ctx) => {
  respond(ctx, home);
});

await app.listen({ port: 8000 });

Here is more information about using JSX in Deno.