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Articles by Aman Gupta
Page 3 of 7
How to filter an object depending on the field\'s value in JavaScript?
Filtering objects by field values is a common JavaScript operation used in web applications. This technique allows you to extract specific data from arrays of objects based on certain criteria, such as filtering products by brand or employees by department. Basic Syntax The most efficient way to filter objects is using the filter() method: const filteredArray = array.filter(item => item.fieldName === fieldValue); array − Collection of objects to filter filter() − JavaScript method that creates a new array with elements passing the test item − Current object being processed fieldName − Property name ...
Read MoreHow to Create an Animated Typing Effect using typed.js
Overview Typed.js is a JavaScript animation library that creates realistic typing effects for web text. You can add it to your project via CDN, NPM, or Yarn. The library animates text by typing and deleting characters, simulating human typing behavior with customizable speed and effects. Syntax The basic syntax to create a Typed.js animation is: var typed = new Typed(selector, options); Where selector is the CSS selector (ID or class) of the target element, and options is an object containing configuration properties like strings, typing speed, and loop settings. Installation Add Typed.js to your project using ...
Read MoreHow to find average color of an image using JavaScript?
Finding the average color of an image involves extracting pixel data from the image and calculating the mean RGB values. JavaScript's Canvas API provides the tools needed to access and analyze image pixel data. How It Works The process involves drawing an image onto a canvas element, extracting pixel data using getImageData(), and calculating the average of all red, green, and blue values. The canvas element allows us to manipulate image data at the pixel level. Basic Syntax const canvas = document.createElement("canvas"); const context = canvas.getContext("2d"); context.drawImage(imageElement, 0, 0); const imageData = context.getImageData(0, 0, width, ...
Read MoreHow to find position of HTML elements in JavaScript?
Overview JavaScript provides several methods to find the position of HTML elements. The two main approaches are using offset properties (offsetLeft and offsetTop) and the getBoundingClientRect() method. The offset properties return the position relative to the nearest positioned ancestor, while getBoundingClientRect() returns the position relative to the viewport. Syntax There are two primary ways to get element position: Using offset Properties element.offsetLeft // Horizontal position element.offsetTop // Vertical position Using getBoundingClientRect() var rect = element.getBoundingClientRect(); // Returns: { top, left, right, bottom, width, height } ...
Read MoreHow to find width of a div using vanilla JavaScript?
Overview JavaScript provides two built-in properties to find the width of a div element: offsetWidth and clientWidth. These properties return the width in pixels but calculate it differently based on what measurements they include. Syntax element.offsetWidth element.clientWidth offsetWidth − Returns the total width including content, padding, border, and scrollbar (if present) clientWidth − Returns the width including content and padding, but excludes border and scrollbar Understanding the Difference The key difference between these methods is what measurements they include: Property Includes Content Includes Padding Includes Border Includes Scrollbar ...
Read MoreHow to find whether all element contains same class or not?
Overview In web development, you often need to check if all elements share the same CSS class. This is useful for validation, styling consistency, or conditional logic. JavaScript provides the classList.contains() method combined with the Array.every() method to efficiently check if all selected elements contain a specific class. Syntax The basic syntax for checking if all elements contain the same class: // Get elements and convert to array let elements = Array.from(document.querySelectorAll('selector')); // Check if all elements contain a specific class let allHaveSameClass = elements.every(element => element.classList.contains('className') ); Method ...
Read MoreHow to check a URL contains a hash or not using JavaScript?
To check whether a URL contains a hash (#) fragment or not in JavaScript, we can use the window.location.hash property. This property returns the hash portion of the URL, including the # symbol, or an empty string if no hash exists. What is a URL Hash? A URL hash is the part of a URL that comes after the # symbol. For example, in the URL https://example.com/page#section1, the hash is #section1. Hashes are commonly used for navigation within a single page or to reference specific sections of content. Syntax window.location.hash This property returns: ...
Read MoreHow to check an element with specific id exist using JavaScript?
In JavaScript, checking if an HTML element with a specific ID exists is a common task when manipulating the DOM. The document.getElementById() method returns the element if found, or null if not found. Syntax document.getElementById(id) document − The document object represents the HTML page loaded in the browser getElementById() − A method that searches for an element with the specified ID and returns it, or null if not found How It Works When document.getElementById() is called, it searches through the DOM tree to find an ...
Read MoreHow to create an Edit icon using jQuery Mobile
jQuery Mobile provides a rich icon library that can be easily integrated into web applications. The edit icon is particularly useful for applications with CRUD operations, allowing users to modify existing content. This icon can be created using the data-icon attribute with the value "edit". Syntax Edit Edit jQuery Mobile CDN Links Add these CDN links to your HTML document's head section − Example 1: Basic Edit Icon The following example demonstrates how to create a basic edit icon using jQuery Mobile − ...
Read MoreHow to create a dynamic HTML pages
Dynamic HTML pages are web pages that can change their content, appearance, or behavior based on user interactions or other conditions. Unlike static pages that display fixed content, dynamic pages respond to user input and can modify themselves in real-time using JavaScript and DOM manipulation. Syntax /* Dynamic styling with JavaScript */ element.style.property = "value"; document.getElementById("elementId").style.backgroundColor = "color"; Key Components of Dynamic Pages Dynamic pages typically combine HTML structure, CSS styling, and JavaScript functionality to create interactive experiences. The main components include − HTML Elements − Provide the structure and content containers ...
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