Q1301. 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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Q1302. 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) =...
Q1303. What is the difference between \_app.js and \_document.js?
While both are root-level files in the Next.js Pages Router, they operate at fundamentally different layers: | Dimension | `_app.js` | `_document.js` | | :--- | :--- | :-...
Q1304. How do you use various CDNs?
VueJS is available in jsdelivr, unpkg and cdnjs etc CDNs. Normally you can use them for prototyping or learning purposes. For example, you can use them using jsdelivr wit...
Q1305. 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...
Q1306. What is LIST comprehensions features of Python used for?
LIST comprehensions features were introduced in Python version 2.0, it creates a new list based on existing list. It maps a list into another list by applying a function ...
Q1307. How does color contrast applies to accessibility in web design?
It is important because people with visual impairments or color blindness may have trouble seeing things if there is not enough contrast. There are guidelines for making ...
Q1308. 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...
Q1309. 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...
Q1310. What is the \_error.js file in Next.js?
In the Next.js Pages Router, **`pages/_error.js`** (or `_error.tsx`) is a fallback error page rendered whenever an unhandled HTTP exception (such as a 500 internal server...