The style.backgroundColor property is used to change the element color, and it returns the string value, which represents the color of the background. Transparent is the default value of these color property. Here we use the onclick event to make changes effective after clicking the button. As we know, the onclick event occurs only when a user clicks the elements and it is a purely JavaScript attribute. Whenever you click on the onclick event it does some actions like displaying a message or redirects the user another page. The onclick event must be used very less in the website, because ... Read More

In this tutorial, we will learn the fastest way to convert JavaScript NodeList to Array. NodeList is a similar structure to an array; it is a collection of DOM (Document Object Model) elements. However, array methods like ‘map( )’, ‘filter( )’, and ‘slice( )’ cannot be used on NodeList objects. There are so many ways to convert NodeList to Array, but this task can be done faster using these two ways − By iterating for loop Using Array.from( ) function By iterating for loop In JavaScript, we can use for loop to iterate over the NodeList to get ... Read More

In this tutorial, we will learn to create an explosion animation effect using canvas in HTML. Using canvas, we can draw graphics on a web page in an easy and powerful way. Let’s see some examples of creating explosion animation in canvas. Explosion Animation 1 We will create an explosion of 50 randomly colored particles that originate from the center of the canvas and move in random directions. The particles will continue to move until the page is refreshed. Algorithm Step 1 − Create an HTML canvas element with an id of "explosion" and set its dimensions to 400x400 ... Read More

We will learn about the V8 engine, Node.js, and the connection between V8 and Node.js. Overview of V8 JavaScript Engine V8 is a high-performance JavaScript engine developed by Google and used in Google Chrome, the open-source browser from Google. It was designed to improve the performance of web applications by compiling JavaScript into native machine code rather than interpreting it, which makes it faster. V8 is C++ based open source JavaScript engine. It runs on various platforms, like Linux, Windows, and macOS. It has features like just-in-time (JIT) compilation, garbage collection, and support for modern JavaScript features such as classes, ... Read More

We can use cookies to store the user information on the client side in the web browser. For example, whenever a user opens any website in the browser, it requests some information to the server, and once the client gets the information, it stores it in the browser with the expiry time. It makes the website faster for users, as it doesn’t need to request the server for information every time users come back to the site. However, once cookies expire, the client requests the server again for that information. In this tutorial, we will learn about the express cookie-parse ... Read More

AJAX (Asynchronous JavaScript and XML) is not a programming language but a technique for creating more interactive web applications. Unlike conventional web applications, which direct us to a new page when interacting with the server, AJAX loads data onto the screen without letting the user know that the request was even made. Advantages Displays content dynamically without reloading the HTML page. Faster interaction with the users. Updates the data within the page without redirecting the user. Users were allowed to use the website while communication with the server went in the background. What is meant by Callback Function? ... Read More

In this tutorial, we will learn to implement MUL() function in JavaScript. This function is a very small kind of multiplication function. Basically, we use the concept of nested functions to implement MUL( ) function. Nested functions are used for creating closures and decorators. And we can achieve privacy using nested functions. There are two ways to implement MUL() function using nested functions − Using nested function with name By currying a function Using nested Function With Name In JavaScript, we can use nested functions to get the multiplication result. We need to write n nested functions to ... Read More

What is JavaScript? It is a loosely typed language that is mainly used in development. We can use javascript both in frontend as well as backend development. The nature of programs is synchronous and executed line by line. You can run javascript on any system or browser as it contains a javascript engine. What is CoffeeScript? CoffeeScript is a subset of javascript in a naive way and is compiled into javascript internally. It is a lightweight language in nature, having user-friendly syntaxes which are contrary to the complex syntax of JavaScript. Many languages like Perl, Python, and Ruby, along with ... Read More

We will generate all rotations of a number in JavaScript by converting the number into a string, then rotating the characters of the string, and finally converting it back into a number. This process will be repeated for each rotation. We will continuously repeat this process until we have generated all the possible rotations of the given number. This program will allow us to efficiently generate all rotations of a number and will be useful for various mathematical computations. Approach The approach to generate all rotations of a number in JavaScript is to convert the number to a string, split ... Read More

We will write a JavaScript program that generates a matrix with the sum of the secondary diagonal being a perfect square. Our program will use nested loops to traverse the matrix and calculate the sum of the secondary diagonal elements. We will then use the Math.sqrt() method to find the square root of the sum and check if it is a whole number. If it is, we will consider the sum to be a perfect square. Approach The approach to generate a matrix with the sum of secondary diagonal equal to a perfect square is as follows − Create ... Read More