Q31. What is children prop?
The `children` prop is a special prop in React used to pass elements between the opening and closing tags of a component. It is commonly used in layout and wrapper compon...
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Q32. How to write comments in React?
The comments in React/JSX are similar to JavaScript Multiline comments but are wrapped in curly braces. **Single-line comments:** ```jsx harmony {/* Single-line comments(...
Q33. What is reconciliation?
`Reconciliation` is the process through which React updates the Browser DOM and makes React work faster. React use a `diffing algorithm` so that component updates are pre...
Q34. Does the lazy function support named exports?
No, currently `React.lazy` function supports default exports only. If you would like to import modules which are named exports, you can create an intermediate module that...
Q35. Why React uses `className` over `class` attribute?
React uses **className** instead of **class** because of a JavaScript naming conflict with the class keyword. 1. `class` is a reserved keyword in JavaScript In JavaScript...
Q36. What are fragments?
It's a common pattern or practice in React for a component to return multiple elements. _Fragments_ let you group a list of children without adding extra nodes to the DOM...
Q37. Why fragments are better than container divs?
Below are the list of reasons to prefer fragments over container DOM elements, 1. Fragments are a bit faster and use less memory by not creating an extra DOM node. This o...
Q38. What are portals in React?
A Portal is a React feature that enables rendering children into a DOM node that exists outside the parent component's DOM hierarchy, while still preserving the React com...
Q39. What are stateless components?
If the behaviour of a component is independent of its state then it can be a stateless component. You can use either a function or a class for creating stateless componen...
Q40. What are stateful components?
If the behaviour of a component is dependent on the _state_ of the component then it can be termed as stateful component. These _stateful components_ are either function ...