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Articles by Kalyan Mishra
Page 5 of 6
How to create an element from a string in JavaScript?
In this tutorial, we will explore various methods to create HTML elements from strings in JavaScript. Creating elements dynamically from strings is essential for building interactive websites, such as to-do list apps where items are added, deleted, and edited on the fly. Using createElement() Method The createElement() method is the standard way to create HTML elements dynamically in JavaScript. This method takes a string parameter representing the tag name and returns a new HTML element. Syntax document.createElement(tagName) Where tagName is a string representing the HTML tag (like "div", "p", "h1", "img"). The method ...
Read MoreHow to check if the value is primitive or not in JavaScript?
In JavaScript, data types are divided into two categories: primitive and non-primitive. Understanding how to check if a value is primitive is crucial for proper data handling. Primitive data types: String, number, undefined, boolean, null, symbol, and bigint. Non-primitive data types: Objects (including arrays, functions, and dates). Primitive values are immutable and represent data at the lowest level of the language. When you "change" a primitive value, you're actually creating a new value and reassigning it to the variable. Using Object() Constructor The Object() constructor converts primitive values to objects. By comparing the original value with ...
Read MoreHow to open a webcam using JavaScript?
In this tutorial, we will learn how to open a webcam using JavaScript. This can be accomplished using WebRTC (Web Real-Time Communication), which allows us to access and capture webcam and microphone devices on the user's system. Understanding getUserMedia() We can access the user's webcam and microphone using the navigator.mediaDevices.getUserMedia() method. This function requires user permission and returns a Promise that resolves when access is granted. Basic Implementation Steps Follow these steps to implement webcam access: STEP 1 − Create HTML elements including a video element for the webcam stream and a ...
Read MoreHow to truncate an array in JavaScript?
This tutorial is going to be about truncating an array in JavaScript. Truncating an array means trimming some elements from the end and assigning back the new value of the truncated array to the actual array. Sometimes we need to truncate an array. For example, if there is an array with sorted elements in descending order, and we need only the first k sorted elements from the array. Instead of creating an extra array and modifying that, we can directly truncate the original array. There are several ways to truncate an array. Let's explore these methods. Syntax ...
Read MoreHow to design a Loan EMI Calculator using HTML, CSS and JavaScript?
To design a Loan EMI Calculator, we will be using HTML to create the basic structure, CSS to design the user interface, and JavaScript to add functionality for calculating EMI based on loan amount, interest rate, and time period. In this article, we will understand the step-by-step process of creating a loan EMI calculator with a clean, interactive interface. Table of Contents Structuring Loan EMI Calculator using HTML Designing UI of Loan EMI Calculator using CSS Adding Functionalities using JavaScript ...
Read MoreWhat are top JavaScript animation libraries?
JavaScript animation libraries offer powerful alternatives to CSS animations, providing greater flexibility and advanced features that CSS alone cannot achieve. These libraries enable developers to create complex animations, 3D graphics, particle effects, and interactive experiences with better performance and cross-browser compatibility. This article explores the top JavaScript animation libraries that can transform your web projects with stunning visual effects. Anime.js Anime.js is a lightweight animation library designed to animate HTML elements, JavaScript objects, CSS selectors, DOM attributes, and arrays. It provides complete control over targeted elements with an intuitive API. Key Features: SVG animations and ...
Read MoreWhat are the different use cases of remainder operator (%) in JavaScript?
In this tutorial, we will explore the different use cases of the remainder operator (%). The % operator returns the remainder when one number is divided by another and takes the sign of the dividend (the first operand). What is Remainder? When dividing two numbers, if the dividend is not completely divisible by the divisor, there is always a remainder. The remainder is what's left over after the division. 10 ÷ 2 = 5 (remainder 0, completely divisible) 6 ÷ 4 = 1 (remainder 2, not completely divisible) The remainder operator works as: dividend ...
Read MoreHow to create a revealing sidebar using HTML, CSS, and JavaScript?
In this tutorial, we will create a revealing sidebar using HTML, CSS, and JavaScript. A revealing sidebar is a navigation menu that slides in and out of view when toggled, providing a clean and modern user interface. Approach We will follow these steps to create our revealing sidebar: STEP 1 − Create the HTML structure with navigation elements including a hamburger menu icon and sidebar items. STEP 2 − Style the elements using CSS to position the sidebar and add smooth transitions. STEP 3 − Add JavaScript ...
Read MoreHow to Create a Video and Audio Recorder with JavaScript MediaRecorder API?
In this tutorial, you will learn how to create an audio and video recorder using JavaScript's MediaRecorder API with WebRTC technology. This allows you to capture and record media directly in the browser. What is WebRTC? WebRTC (Web Real-Time Communication) enables real-time communication capabilities in web browsers. It allows access to user devices like webcams and microphones through JavaScript APIs. The core method for accessing media devices is: navigator.mediaDevices.getUserMedia(constraints) The getUserMedia() function requests user permission to access the webcam and microphone. It returns a Promise that resolves with a MediaStream if permission is ...
Read MoreHow to upload an image using HTML and JavaScript in Firebase?
Firebase is a Google cloud platform that provides storage, database, and authentication services. In this tutorial, you'll learn how to upload images to Firebase Storage using HTML and JavaScript. Firebase is a comprehensive cloud platform offering NoSQL databases, real-time hosting, authentication, push notifications, and file storage services for web and mobile applications. Prerequisites Before starting, you need to create a Firebase project and configure storage. Follow these steps to set up your Firebase project: Firebase Project Setup STEP 1 − Visit the Firebase Console and click "Get started", then "Create a project". STEP 2 ...
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