JavaScript-QnA

TypeScript

What is e.target Value in JavaScript ?

WebTech-FAQs

Last Updated: 22 February 2024

In JavaScript, `e.target` refers to the event target of a user interaction, typically within an event handler function. It represents the DO ...read more

Temporal dead zone in JavaScript

Last Updated: 12 February 2024

The Temporal Dead Zone (TDZ) is a concept in JavaScript that relates to the hoisting of the variables and the visibility of variables declar ...read more

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What is the DOM (Document Object Model) ?

Last Updated: 02 February 2024

The DOM, or Document Object Model, is a programming interface for web documents. It represents the structure of a document as a tree of obje ...read more

How to Create an Empty Map in JavaScript ?

Last Updated: 01 February 2024

In JavaScript, you can create an empty Map using the Map constructor. whenever we initialize any map it is empty at first and we need to dec ...read more

How to Check the Size of a JavaScript Map ?

Last Updated: 01 February 2024

To check the size (number of key-value pairs) of a Map in JavaScript, you can use the size property. The size property is a property of the ...read more

What Happens when you try to Add a Duplicate Value to a Set in JavaScript ?

Last Updated: 01 February 2024

When you try to add a duplicate value to a Set in JavaScript using the add() method, the Set ignores the duplicate value. Sets are designed ...read more

How to Iterate over the Elements of a Set in JavaScript ?

Last Updated: 01 February 2024

In JavaScript, you can iterate over the elements of a Set using various methods, such as the forEach() method, the for...of loop, or by conv ...read more

How to Create an Empty Set in JavaScript ?

Last Updated: 01 February 2024

In JavaScript, you can create an empty Set using the Set constructor.Syntax:let emptySet = new Set();Example: Here, new Set() creates a new ...read more

How to Convert an Array to a String in JavaScript ?

Last Updated: 31 January 2024

In JavaScript, you can convert an array to a string using the join() method or by using the toString() method. Both methods provide differen ...read more

What is a Blob Object in JavaScript ?

Last Updated: 31 January 2024

In JavaScript, a Blob (Binary Large Object) is an object that represents raw binary data(collection of bytes). It is commonly used to handle ...read more

How to Concatenate Two Variables in JavaScript ?

Last Updated: 29 January 2024

In JavaScript, you can concatenate two variables (combine their values into a single string) using the + operator. Example 1: Here, the + op ...read more

How to use the ! Operator to negate a Boolean Value in JavaScript ?

Last Updated: 29 January 2024

In JavaScript, you can use the ! (logical NOT) operator to negate a boolean value. The ! operator flips the truthiness of a value. If the op ...read more

How to Create an Empty Object in JavaScript ?

Last Updated: 29 January 2024

In JavaScript, We can create an empty object using curly braces {} and the Object constructor.Example: Using curly braces {} and we are not ...read more