useasync-ssr
v1.1.0
Published
React useAsync for SSR
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useasync-ssr
React useAsync for SSR. You can use useAsync with SSR Support!
How it works
When first ReactDOM.renderToString called, AsyncManager saves promises that requested in react tree. Then when asyncManager.load called, await all promises resolved or rejected. Next render, AsyncManager will fill async values. Then you can get filled html.
Usage
Client
import { Helmet } from "react-helmet";
import { useAsync } from "useasync-ssr";
function getCount() {
return fetch(API_URI + '/count').then(response => response.text()).then(v => parseInt(v));
}
export const Count1 = () => {
const count = useAsync(() => getCount());
return (
<div>
<Helmet>
<title>{'Count ' + count.value}</title>
</Helmet>
<h1>Count</h1>
<p>Count: {count.value}</p>
</div>
)
};const app = express();
app.get('/render', async (req, res) => {
const asyncManager = new AsyncManager();
const Tree = (
<AsyncProvider asyncManager={asyncManager}>
<App/>
</AsyncProvider>
);
// Scan tree
ReactDOM.renderToString(Tree);
Helmet.renderStatic();
// Load async requests & save caches
const caches = await asyncManager.load();
// Filled content
const content = ReactDOM.renderToString(Tree);
// Make html with useAsync caches
const html = <Html content={content} helmet={helmet} caches={caches}/>;
// Send!
res.status(200);
res.send(`<!doctype html>\n${ReactDOM.renderToString(html)}`);
res.end();
});Check out full examples