Q541. What is V8 JavaScript engine?
V8 is an open source high-performance JavaScript engine used by the Google Chrome browser, written in C++. It is also being used in the node.js project. It implements ECM...
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Q542. Why do we call javascript as dynamic language?
JavaScript is a loosely typed or a dynamic language because variables in JavaScript are not directly associated with any particular value type, and any variable can be as...
Q543. What is a void operator?
The `void` operator evaluates the given expression and then returns `undefined` (i.e, without returning value). The syntax would be as below, ```javascript void expressio...
Q544. How to set the cursor to wait?
The cursor can be set to wait in JavaScript by using the property `cursor`. Let's perform this behavior on page load using the below function. ```javascript function myFu...
Q545. How do you create an infinite loop?
You can create infinite loops using for and while loops without using any expressions. The for loop construct or syntax is better approach in terms of ESLint and code opt...
Q546. Why do you need to avoid with statement?
JavaScript's with statement was intended to provide a shorthand for writing recurring accesses to objects. So it can help reduce file size by reducing the need to repeat ...
Q547. What is the output of the following for loops?
```javascript for (var i = 0; i < 4; i++) { // global scope setTimeout(() => console.log(i)); } for (let i = 0; i < 4; i++) { // block scope setTimeout(() => console.log(...
Q548. List down some of the features of ES6
Below are the list of some new features of ES6, 1. Support for constants or immutable variables 2. Block-scope support for variables, constants and functions 3. Arrow fun...
Q549. What is ES6?
ES6 is the sixth edition of the javascript language and it was released in June 2015. It was initially known as ECMAScript 6 (ES6) and later renamed to ECMAScript 2015. A...
Q550. Can I redeclare let and const variables?
No, you cannot redeclare let and const variables. If you do, it throws below error ```bash Uncaught SyntaxError: Identifier 'someVariable' has already been declared ``` *...