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Always clean up listeners!

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Franck Royer 2021-08-05 16:01:14 +10:00
parent cecbaad4f2
commit 8322d24ac1
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1 changed files with 12 additions and 6 deletions
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18
examples/store-reactjs-chat/src/App.js
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@ -65,18 +65,24 @@ function App() {
// We do not handle disconnection/re-connection in this example // We do not handle disconnection/re-connection in this example
if (connectedToStore) return; if (connectedToStore) return;
const isStoreNode = ({ protocols }) => {
if (protocols.includes(StoreCodec)) {
// We are now connected to a store node
setConnectedToStore(true);
}
};
// This demonstrates one way to wait to be connected to a store node. // This demonstrates one way to wait to be connected to a store node.
// //
// This is only for demonstration purposes as it is not needed in this // This is only for demonstration purposes as it is not needed in this
// example app as we query the store node every 10s and catch if it fails. // example app as we query the store node every 10s and catch if it fails.
// Meaning if we are not connected to a store node, then it just fails and // Meaning if we are not connected to a store node, then it just fails and
// we try again 10s later. // we try again 10s later.
waku.libp2p.peerStore.once('change:protocols', ({ protocols }) => { waku.libp2p.peerStore.on('change:protocols', isStoreNode);
if (protocols.includes(StoreCodec)) {
// We are now connected to a store node return () => {
setConnectedToStore(true); waku.libp2p.peerStore.removeListener('change:protocols', isStoreNode);
} };
});
}, [waku, connectedToStore]); }, [waku, connectedToStore]);
return ( return (