React: How to Update Props?

In React, props are immutable, meaning you cannot directly modify the props received by a component. If you need to update props, the typical approach is to modify these props' values in the parent component. Here are the general steps:

1. Maintain state in the parent component: Use useState or this.state in class components to manage state.

2. Pass the state to the child component: Pass the state to the child component via props.

3. Provide a callback function to the child component: This callback function allows the child component to notify the parent component to update the state. Typically, this function is also passed to the child component via props.

4. Call the callback function in the child component: When the child component needs to trigger an update, it can call the callback function passed from the parent component, which typically triggers a state update.

5. Re-render after parent component state update: When the parent component's state is updated, it triggers a re-render of the parent component and related child components, so the new props values are passed to the child components.

In this way, although props themselves cannot be directly modified, you can indirectly update the props of the child component through the state and callback mechanism in the parent component.