Q41. How to apply validation on props in React?
When the application is running in _development mode_, React will automatically check all props that we set on components to make sure they have _correct type_. If the ty...
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Q42. What are the advantages of React?
Below are the list of main advantages of React, 1. Increases the application's performance with _Virtual DOM_. 2. JSX makes code easy to read and write. 3. It renders bot...
Q43. What are the limitations of React?
Apart from the advantages, there are few limitations of React too, 1. React is just a view library, not a full framework. 2. There is a learning curve for beginners who a...
Q44. What are the recommended ways for static type checking?
**Modern Recommendation (2026):** **TypeScript** is the industry standard for type checking in React applications. While PropTypes (`React.PropTypes` moved to `prop-types...
Q45. What is the use of `react-dom` package?
The `react-dom` package provides _DOM-specific methods_ that can be used at the top level of your app. Most of the components are not required to use this module. Some of...
Q46. What is ReactDOMServer?
The `ReactDOMServer` object enables you to render components to static markup (typically used on node server). This object is mainly used for _server-side rendering_ (SSR...
Q47. How to use innerHTML in React?
The `dangerouslySetInnerHTML` attribute is React's replacement for using `innerHTML` in the browser DOM. Just like `innerHTML`, it is risky to use this attribute consider...
Q48. How to use styles in React?
The `style` attribute accepts a JavaScript object with camelCased properties rather than a CSS string. This is consistent with the DOM style JavaScript property, is more ...
Q49. How events are different in React?
Handling events in React elements has some syntactic differences: 1. React event handlers are named using camelCase, rather than lowercase. 2. With JSX you pass a functio...
Q50. What is the impact of indexes as keys?
Keys should be stable, predictable, and unique so that React can keep track of elements. In the below code snippet each element's key will be based on ordering, rather th...