Updating data without having to refresh the page is a useful feature when it comes to deleting a document on Firebase

Question

Updating data without having to refresh the page is a useful feature when it comes to deleting a document on Firebase

Currently, I have a button that triggers this function to remove a value from Firebase. These values are being displayed in a flatlist on the same page. The function itself works perfectly fine, but to see the updated changes, I either need to refresh the page or navigate away and back to it.

Here is the function in question:

   const onDelete = (sizeId) => {
        firebase.firestore()
            .collection("Measures")
            .doc(firebase.auth().currentUser.uid)
            .collection(route.params.size)
            .doc(sizeId)
            .delete()

I am interested in finding out how I can automatically trigger a refresh after the deletion so that the flatlist updates instantly without showing the deleted value.

reactjs firebase google-cloud-firestore

Answer 1

Answer №1

To enhance performance in React, consider using a PureComponent instead of a regular Class component. By implementing a boolean state to trigger re-renders when removing values from the state array, you can optimize rendering processes.
If you prefer functional components and utilize a useState hook for data management, leverage the useEffect hook to automatically re-render upon changes to the state.

const [arr, setArr] = useState([]);

useEffect( () => {}, [arr] ); //This will trigger re-renders when 'arr' state changes.

Make sure not to update state within the useEffect function to avoid infinite loops. For such cases, consider using a toggling boolean variable to manually control re-renders as needed.

Answer 2

To enhance performance in React, consider using a PureComponent instead of a regular Class component. By implementing a boolean state to trigger re-renders when removing values from the state array, you can optimize rendering processes.
If you prefer functional components and utilize a useState hook for data management, leverage the useEffect hook to automatically re-render upon changes to the state.

const [arr, setArr] = useState([]);

useEffect( () => {}, [arr] ); //This will trigger re-renders when 'arr' state changes.

Make sure not to update state within the useEffect function to avoid infinite loops. For such cases, consider using a toggling boolean variable to manually control re-renders as needed.

Updating data without having to refresh the page is a useful feature when it comes to deleting a document on Firebase

Answer №1

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