Q481. What is the use of preventDefault method?
The preventDefault() method cancels the event if it is cancelable, meaning that the default action or behaviour that belongs to the event will not occur. For example, pre...
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Q482. What is the difference between `mapStateToProps()` and `mapDispatchToProps()`?
`mapStateToProps()` is a utility which helps your component get updated state (which is updated by some other components): ```javascript const mapStateToProps = (state) =...
Q483. Is autocommit enabled by default in MySQL?
**Yes**, in MySQL (using the standard InnoDB storage engine), **autocommit is enabled by default** (`autocommit = 1`): ### What Autocommit Means: - Every individual SQL s...
Q484. What is the use of stopPropagation method?
The stopPropagation method is used to stop the event from bubbling up the event chain. For example, the below nested divs with stopPropagation method prevents default eve...
Q485. Can I dispatch an action in reducer?
Dispatching an action within a reducer is an **anti-pattern**. Your reducer should be _without side effects_, simply digesting the action payload and returning a new stat...
Q486. What is CSS filter?
CSS filters are a set of visual effects that can be applied to HTML elements using CSS. Filters can be used to adjust the appearance of an element in various ways, such a...
Q487. What are the steps involved in return false usage?
The return false statement in event handlers performs the below steps, 1. First it stops the browser's default action or behaviour. 2. It prevents the event from propagat...
Q488. How to access Redux store outside a component?
You just need to export the store from the module where it created with `createStore()`. Also, it shouldn't pollute the global window object. ```javascript store = create...
Q489. How do you create a 404 page in Next.js?
Creating a customized 404 Not Found page is straightforward in both Next.js routers: ### 1. In App Router (`app/` directory): Create **`app/not-found.tsx`**: ```tsx // ap...
Q490. What is BOM?
The Browser Object Model (BOM) allows JavaScript to "talk to" the browser. It consists of the objects navigator, history, screen, location and document which are children...