Q491. What are the drawbacks of MVW pattern?
1. DOM manipulation is very expensive which causes applications to behave slow and inefficient. 2. Due to circular dependencies, a complicated model was created around mo...
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Q492. What is a CSS sprite?
A CSS sprite is a technique used to combine multiple images into a single image file, reducing the number of HTTP requests required to load the page and improving loading...
Q493. What is the use of setTimeout?
The setTimeout() method is used to call a function or evaluate an expression after a specified number of milliseconds. For example, let's log a message after 2 seconds us...
Q494. Are there any similarities between Redux and RxJS?
These libraries are very different for very different purposes, but there are some vague similarities. Redux is a tool for managing state throughout the application. It i...
Q495. What is the :not() pseudo-class used for in CSS?
The **`:not()`** functional pseudo-class (known as the negation pseudo-class) matches elements that do **not** match the selector argument provided inside its parentheses...
Q496. What is the use of setInterval?
The setInterval() method is used to call a function or evaluate an expression at specified intervals (in milliseconds). For example, let's log a message after 2 seconds u...
Q497. How to reset state in Redux?
You need to write a _root reducer_ in your application which delegate handling the action to the reducer generated by `combineReducers()`. For example, let us take `rootR...
Q498. Why is JavaScript treated as Single threaded?
JavaScript is a single-threaded language. Because the language specification does not allow the programmer to write code so that the interpreter can run parts of it in pa...
Q499. What is the :visited pseudo-class used for in CSS?
The **`:visited`** pseudo-class styles anchor links (``) that the user has already navigated to in their browser history: ```css a:visited { color: #7c3aed; /* Purple ind...
Q500. What is an event delegation?
Event delegation is a technique where you attach **one event listener to a parent element** instead of adding listeners to each child element. It works because events bub...