Q561. What are default values in destructuring assignment?
A variable can be assigned a default value when the value unpacked from the array or object is undefined during destructuring assignment. It helps to avoid setting defaul...
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Q562. What are the key features introduced in React 18?
React 18, released in March 2022, introduced several groundbreaking features focused on performance and user experience: #### 1. **Automatic Batching** Batch multiple sta...
Q563. How do you swap variables in destructuring assignment?
If you don't use destructuring assignment, swapping two values requires a temporary variable. Whereas using a destructuring feature, two variable values can be swapped in...
Q564. What are the key features introduced in React 19?
React 19 (released 2024) brings major improvements for full-stack React applications: #### 1. **React Compiler (formerly React Forget)** Automatic memoization - no more m...
Q565. What are enhanced object literals?
Object literals make it easy to quickly create objects with properties inside the curly braces. For example, it provides shorter syntax for common object property definit...
Q566. What is the use() hook in React 19?
The `use()` hook allows you to read the value of a resource (Promise or Context) during render, with Suspense integration. #### Reading Promises ```jsx import { use, Susp...
Q567. What are dynamic imports?
The dynamic imports using `import()` function syntax allows us to load modules on demand by using promises or the async/await syntax. Currently this feature is in [stage4...
Q568. What are Server Actions in React 19?
**Server Actions** allow you to call server-side functions directly from client components without writing API endpoints. #### Basic Server Action ```jsx // app/actions.j...
Q569. What are the use cases for dynamic imports?
Below are some of the use cases of using dynamic imports over static imports, 1. Import a module on-demand or conditionally. For example, if you want to load a polyfill o...
Q570. What are useFormState and useFormStatus hooks?
These hooks simplify form handling with Server Actions in React 19. #### useFormState Manages form state and handles server responses: ```jsx 'use client' import { useFor...