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Fix: Add cleanup function to useEffect in 03-client-step7 #65

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Fix: Add cleanup function to useEffect in 03-client-step7 #65

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19 changes: 14 additions & 5 deletions 03-client/test/src/hooks/useCounterContract.step7.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@ export function useCounterContract() {
const { sender } = useTonConnect();

const sleep = (time: number) => new Promise((resolve) => setTimeout(resolve, time));

const counterContract = useAsyncInitialize(async () => {
if (!client) return;
const contract = new Counter(
Expand All @@ -21,15 +21,24 @@ export function useCounterContract() {
}, [client]);

useEffect(() => {
let isCancelled = false;

async function getValue() {
if (!counterContract) return;
if (!counterContract || isCancelled) return;
setVal(null);
const val = await counterContract.getCounter();
setVal(val.toString());
await sleep(5000); // sleep 5 seconds and poll value again
getValue();
if (!isCancelled) {
setVal(val.toString());
await sleep(5000); // sleep 5 seconds and poll value again
getValue();
}
}

getValue();

return () => {
isCancelled = true;
};
}, [counterContract]);

return {
Expand Down