Q621. What are template literals?
Template literals or template strings are string literals allowing embedded expressions. These are enclosed by the back-tick (`) character instead of double or single quo...
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Q622. What is the useInsertionEffect hook?
The `useInsertionEffect` hook is designed for **CSS-in-JS library authors** to inject styles into the DOM before any layout effects run. It fires synchronously before DOM...
Q623. How do you write multi-line strings in template literals?
In ES5, you would have to use newline escape characters('\\n') and concatenation symbols(+) in order to get multi-line strings. ```javascript console.log("This is string ...
Q624. How do you share state logic between components using custom hooks?
Custom hooks allow you to **extract and share stateful logic** between components without changing their hierarchy. The state itself is not shared—each component using th...
Q625. What are nesting templates?
The nesting template is a feature supported within template literals syntax to allow inner backticks inside a placeholder ${ } within the template. For example, the below...
Q626. What is the useDebugValue hook?
The `useDebugValue` hook is used to **display a label** for custom hooks in **React DevTools**. It helps developers debug custom hooks by showing meaningful information. ...
Q627. What are tagged templates?
Tagged templates are the advanced form of templates in which tags allow you to parse template literals with a function. The tag function accepts the first parameter as an...
Q628. How do you handle cleanup in useEffect?
The cleanup function in `useEffect` is used to **clean up side effects** before the component unmounts or before the effect runs again. This prevents memory leaks, stale ...
Q629. What are raw strings?
ES6 provides a raw strings feature using the `String.raw()` method which is used to get the raw string form of template strings. This feature allows you to access the raw...
Q630. What are the differences between useEffect and useEvent (experimental)?
`useEvent` is an **experimental hook** (not yet stable in React) designed to solve the problem of creating **stable event handlers** that always access the latest props a...