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64 lines
1.4 KiB
Markdown
64 lines
1.4 KiB
Markdown
Bun supports `.jsx` and `.tsx` files out of the box. Bun's internal transpiler converts JSX syntax into vanilla JavaScript before execution.
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```tsx#react.tsx
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function Component(props: {message: string}) {
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return (
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<body>
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<h1 style={{color: 'red'}}>{props.message}</h1>
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</body>
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);
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}
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console.log(<Component message="Hello world!" />);
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```
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Bun implements special logging for JSX to make debugging easier.
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```bash
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$ bun run react.tsx
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<Component message="Hello world!" />
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```
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### Prop punning
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The Bun runtime also supports "prop punning" for JSX. This is a shorthand syntax useful for assigning a variable to a prop with the same name.
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```tsx
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function Div(props: {className: string;}) {
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const {className} = props;
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// without punning
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return <div className={className} />;
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// with punning
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return <div {className} />;
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}
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```
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### Server-side rendering
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To server-side render (SSR) React in an [HTTP server](/docs/api/http):
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```tsx#ssr.tsx
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import {renderToReadableStream} from 'react-dom/server';
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function Component(props: {message: string}) {
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return (
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<body>
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<h1 style={{color: 'red'}}>{props.message}</h1>
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</body>
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);
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}
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Bun.serve({
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port: 4000,
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async fetch() {
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const stream = await renderToReadableStream(
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<Component message="Hello from server!" />
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);
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return new Response(stream, {
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headers: {'Content-Type': 'text/html'},
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});
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},
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});
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```
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