Q591. How do you load CSS and JS files dynamically?
You can create both link and script elements in the DOM and append them as child to head tag. Let's create a function to add script and style resources as below, ```javas...
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Q592. Can useRef be used to store previous values?
Yes, `useRef` is a common pattern when you want to compare current and previous props or state without causing re-renders. **Example: Storing previous state value** ```js...
Q593. What are the different methods to find HTML elements in DOM?
If you want to access any element in an HTML page, you need to start with accessing the document object. Later you can use any of the below methods to find the HTML eleme...
Q594. Is it possible to access a ref in the render method?
Yes, you can access a ref in the render method, but what you get from it depends on how you're using the ref and when in the component lifecycle you're rendering. For exa...
Q595. What is jQuery?
jQuery is a popular cross-browser JavaScript library that provides Document Object Model (DOM) traversal, event handling, animations and AJAX interactions by minimizing t...
Q596. What are the common usecases of useRef hook?
Some of the common cases are: * Automatically focus an input when a component mounts. * Scroll to a specific element. * Measure element dimensions (`offsetWidth`, `client...
Q597. What is V8 JavaScript engine?
V8 is an open source high-performance JavaScript engine used by the Google Chrome browser, written in C++. It is also being used in the node.js project. It implements ECM...
Q598. What is useImperativeHandle Hook? Give an example.
`useImperativeHandle` is a React Hook that allows a **child component** to expose **custom functions or properties** to its **parent component**, when using `ref`. It is ...
Q599. Why do we call javascript as dynamic language?
JavaScript is a loosely typed or a dynamic language because variables in JavaScript are not directly associated with any particular value type, and any variable can be as...
Q600. When should you use useImperativeHandle?
The useImperativeHandler hook will be used in below cases: * You want to expose **imperative methods** from a child component - Custom input controls exposing `focus`, `c...