Fix React Page Not Updating on Data Change

In case data updates in a React page but the page does not reflect the changes, there could be a few possible reasons and solutions for this issue.

1. Check if state or props are being used correctly: Ensure that when data is updated, the corresponding state or props are updated correctly. If state or props are not updated correctly, the page will not update. Data can be updated by using the setState() method or passing new props when updating data.
2. Check if the reference of the data has changed: React uses shallow comparison to determine if a page needs to be updated. Even if the value of the data changes, the page will not be updated if the reference of the data remains the same. Shallow or deep copying can be used to ensure that the reference of the data changes.
3. Ensure that the method for updating data is correctly called within the component: If the method for updating data is not called correctly, the data will not be updated. This issue can be resolved by properly calling the method for updating data within the component.
4. Double check if the correct lifecycle method is being used: sometimes, the reason why the page does not update after data is updated is because the lifecycle methods are not being used correctly. For example, if the data update is done in the componentDidMount() method instead of the componentDidUpdate() method, the page will not update. Make sure to update data in the correct lifecycle method.
5. Check if pure components are used: if a component is labeled as a pure component, it will only update the page when the props change, not when the state changes. If you need the page to update when the state changes, you can change the component to a regular component.

By examining the possible reasons mentioned above and taking appropriate measures, the issue of React data not updating on the page should be resolved.