Created
September 3, 2021 01:03
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Fetching data in a useEffect that might be triggered several times.
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| useEffect(() => { | |
| let isSubscribed = true; | |
| // declare the async data fetching function | |
| const fetchData = async () => { | |
| // get the data from the api | |
| const data = await fetch(`https://yourapi.com?param=${param}`); | |
| // convert the data to json | |
| const json = await response.json(); | |
| // set state with the result if `isSubscribed` is true | |
| if (isSubscribed) { | |
| setData(json); | |
| } | |
| } | |
| // call the function | |
| fetchData() | |
| // make sure to catch any error | |
| .catch(console.error);; | |
| // cancel any future `setData` | |
| return () => isSubscribed = false; | |
| }, [param]) |
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