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let ws = new WebSocket("ws://elepsio.herokuapp.com/");
const [barData, setBarData] = useState({
data: [
{
time: "18:02",
pulse: 87,
},
],
});
useEffect(() => {
ws.onopen = () => console.log("ws opened");
// ws.onclose = () => console.log("ws closed");
return () => {
ws.close();
};
}, []);
ws.onmessage = function (event) {
setBarData({ data: [...barData.data, JSON.parse(event.data)] });
};M
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