Q21. How to listen to state changes?
The `componentDidUpdate` lifecycle method will be called when state changes. You can compare provided state and props values with current state and props to determine if ...
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Q22. How to make AJAX call and in which component lifecycle methods should I make an AJAX call?
You can use AJAX libraries such as Axios, jQuery AJAX, and the browser built-in `fetch`. You should fetch data in the `componentDidMount()` lifecycle method. This is so y...
Q23. Why do you not need error boundaries for event handlers?
Error boundaries do not catch errors inside event handlers. React doesn’t need error boundaries to recover from errors in event handlers. Unlike the render method and lif...
Q24. What is the purpose of getDerivedStateFromError?
This lifecycle method is invoked after an error has been thrown by a descendant component. It receives the error that was thrown as a parameter and should return a value ...
Q25. What are the methods invoked during error handling?
Below methods are called when there is an error during rendering, in a lifecycle method, or in the constructor of any child component. 1. static getDerivedStateFromError(...