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Articles by Manisha Patil
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How to prevent sticky hover effects for buttons on touch devices?
Touch devices often exhibit "sticky" hover effects where buttons remain in their hovered state after being tapped. This creates a poor user experience as the visual feedback doesn't match the intended interaction model of touch interfaces. The Problem with Hover on Touch Devices Touch screens don't have true hover capabilities, but many browsers simulate hover events when elements are touched. This causes several issues: Elements may remain in their hovered state after being tapped, creating a "sticky" effect On iOS devices, the hover state briefly appears before navigation, causing visual flicker Hover effects that show/hide elements ...
Read MoreImplement Green Screen Algorithm using JavaScript
The green screen algorithm, also known as the chromakey algorithm, replaces all green pixels in a foreground image with corresponding pixels from a background image. This technique is widely used in film and video production to composite subjects against different backgrounds. The algorithm works by analyzing each pixel's color values. When a pixel has more green than red and blue combined, it's considered part of the green screen and gets replaced with the corresponding pixel from the background image. Requirements This implementation uses the SimpleImage library for image manipulation. Include this script in your HTML: ...
Read MoreTarget a Window Using JavaScript or HTML
In this article we will learn how to use the TARGET attribute to open a website in a new window using HTML and JavaScript. TARGET attribute of HTML A link's opening named frame or window is specified using the Target attribute of the anchor tag. The concluding tag in the HTML content must appear after each commencing tag since the element is paired. Although the href (hypertext reference) element of the anchor tag has several other options, it is required since it contains the URL of the webpage where the link will go when ...
Read MoreUnit Testing Challenges with Modular JavaScript Patterns
Unit testing is a crucial automated testing technique that isolates and tests small portions of your application. Unlike integration tests, unit tests don't connect to external dependencies like databases or HTTP services, making them faster and more reliable. This "full isolation" approach ensures tests won't fail due to external service issues. However, when working with modular JavaScript patterns, unit testing presents unique challenges. Modules help organize code by keeping units cleanly separated, but their encapsulation features can make testing private methods and variables difficult. JavaScript Module Patterns Overview JavaScript modules (also called ES modules or ECMAScript modules) ...
Read MoreWhat is the role of deferred scripts in JavaScript?
The defer attribute in JavaScript is a crucial performance optimization tool that controls when scripts execute during page loading. It ensures scripts run only after the HTML document has been completely parsed, preventing blocking behavior that can slow down page rendering. The Problem with Regular Scripts When a browser encounters a regular tag, it stops HTML parsing, downloads the script, executes it, and then continues parsing. This blocking behavior creates performance bottlenecks and delays page rendering. Regular Script Loading (Blocking) HTML Parsing Script ...
Read MoreWhat is the use of stopPropagation method in JavaScript
The stopPropagation() method prevents events from bubbling up through the DOM tree to parent elements. When an event occurs on a child element, it normally triggers on all parent elements too - this method stops that behavior. The Event Bubbling Problem In JavaScript, events "bubble up" from child to parent elements. For example, if a button is inside a div and both have click handlers, clicking the button triggers both events. The stopPropagation() method prevents this propagation. Syntax event.stopPropagation(); Example: Event Bubbling Without stopPropagation Event ...
Read MoreWhy is JavaScript considered a loosely-typed language
JavaScript is considered a loosely typed language because you don't need to declare variable types explicitly. JavaScript automatically determines the data type based on the value assigned to the variable. This flexibility sets it apart from strongly typed languages like Java or C++. What Makes JavaScript Loosely Typed? In JavaScript, you can assign any type of value to a variable without declaring its type: JavaScript Loose Typing Example let variable = 42; ...
Read MoreHow to change video playing speed using JavaScript?
In this article, we'll learn how to control video playback speed using JavaScript's HTML5 video properties. This allows users to watch videos at different speeds for better accessibility or user experience. The playbackRate property controls video speed: values less than 1 slow down the video, values greater than 1 speed it up, and 1 returns to normal speed. Note that playbackRate is a JavaScript property, not an HTML attribute. Syntax To change the current playback speed: let video = document.querySelector('video'); video.playbackRate = newSpeed; To set the default playback speed: let video ...
Read MoreCreate many JavaScript objects as the same type?
In JavaScript, there are several ways to create multiple objects of the same type. JavaScript is a prototype-based object-oriented language, which means objects can inherit directly from other objects without needing traditional classes. This article explores various methods for creating objects with consistent structure and behavior. Using Constructor Functions Constructor functions are one of the most traditional ways to create multiple objects with the same structure. A constructor is simply a function that, when called with the new keyword, creates and returns a new object instance. Create many JavaScript objects as the same type ...
Read MoreHow to get the code name and product name of the browser in JavaScript?
When a user accesses a web application, the JavaScript navigator object contains details about the browser they are currently using. Since each browser functions differently in how it interprets JavaScript, the navigator object helps in adapting your application to the user's browser preferences. The browser engine or product name can be accessed in JavaScript using the navigator.product property. However, in modern browsers, navigator.product always returns "Gecko" for compatibility reasons, regardless of the actual browser being used. Navigator.product Property Syntax navigator.product Example 1: Getting Browser Product Name This example demonstrates how to access ...
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