Q251. What is strict mode in React?
`React.StrictMode` is a useful component for highlighting potential problems in an application. Just like ``, `` does not render any extra DOM elements. It activates addi...
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Q252. What is the benefit of strict mode?
The will be helpful in the below cases, 1. To find the bugs caused by impure rendering where the components will re-render twice. 2. To find the bugs caused by missing cl...
Q253. Why does strict mode render twice in React?
StrictMode renders components twice in development mode(not production) in order to detect any problems with your code and warn you about those problems. This is used to ...
Q254. What are the rules of JSX?
The below 3 rules needs to be followed while using JSX in a react application. 1. **Return a single root element**: If you are returning multiple elements from a componen...
Q255. What is the reason behind multiple JSX tags to be wrapped?
Behind the scenes, JSX is transformed into plain javascript objects. It is not possible to return two or more objects from a function without wrapping into an array. This...
Q256. How do you prevent mutating array variables?
The preexisting variables outside of the function scope including state, props and context leads to a mutation and they result in unpredictable bugs during the rendering ...
Q257. What are capture phase events?
The `onClickCapture` React event is helpful to catch all the events of child elements irrespective of event propagation logic or even if the events propagation stopped. T...
Q258. How does React updates screen in an application?
React updates UI in three steps, 1. **Triggering or initiating a render:** The component is going to triggered for render in two ways. 1. **Initial render:** When the app...
Q259. How does React batch multiple state updates?
React prevents component from re-rendering for each and every state update by grouping multiple state updates within an event handler. This strategy improves the applicat...
Q260. Is it possible to prevent automatic batching?
Yes, it is possible to prevent automatic batching default behavior. There might be cases where you need to re-render your component after each state update or updating on...