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Articles by Chandu yadav
Page 19 of 81
Set the top margin of an element with CSS
The margin-top property specifies the top margin of an element in CSS. It creates space above an element, pushing it away from adjacent elements or the container's top edge. Syntax margin-top: value; The value can be specified in pixels (px), percentages (%), em units, or set to auto for automatic margin calculation. Example CSS margin-top Example This ...
Read MoreAlign HTML5 SVG to the center of the screen
SVG stands for Scalable Vector Graphics and it is a language for describing 2D-graphics and graphical applications in XML. HTML5 provides native SVG support, and centering SVG elements on a webpage requires specific CSS techniques. Method 1: Using Auto Margins and Display Block The simplest way to center an SVG horizontally is using auto margins with display block: #svgelem { margin-left: auto; ...
Read MoreHTML5 Canvas distorted
HTML5 Canvas distortion occurs when the canvas element's CSS dimensions don't match its internal drawing dimensions. This creates scaling issues that make drawings appear stretched or blurry. Understanding Canvas Dimensions Canvas has two sets of dimensions: Drawing dimensions: Set via width and height attributes Display dimensions: Set via CSS width and height properties When these don't match, the browser scales the drawing surface to fit the display size, causing distortion. Default Canvas Size The default canvas dimensions are: width = 300px height = 150px This gives a 2:1 aspect ...
Read MoreSet image for bullet style with CSS
The list-style-image CSS property allows you to replace default bullet points with custom images, giving you complete control over list styling. Syntax list-style-image: url('path/to/image.png'); list-style-image: none; /* Default */ Basic Example Here's how to set a custom bullet image for an unordered list: .custom-bullets { list-style-image: url('/images/arrow-bullet.png'); } ...
Read MoreUsage of CSS list-style-position property
The list-style-position property controls whether list markers (bullets, numbers) appear inside or outside the content area of list items. Syntax list-style-position: inside | outside | initial | inherit; Values outside (default): Markers appear outside the content area inside: Markers appear inside the content area Example: Outside vs Inside Positioning .outside-list { list-style-position: outside; ...
Read MoreUse HTML with jQuery to make a form
To create forms with HTML and jQuery, you can either write static HTML forms or dynamically generate them using jQuery's DOM manipulation methods. Creating a Static HTML Form The basic approach uses standard HTML form elements: Student Details: Student Name: ...
Read MoreWhat's the best way to detect a 'touch screen' device using JavaScript?
The best way to detect a touch screen device is to check whether touch events are supported in the browser's document model. This approach tests for the presence of touch event properties. Basic Touch Detection The most reliable method is to check for the ontouchstart property in the document element: function checkTouchDevice() { return 'ontouchstart' in document.documentElement; } // Test the function console.log("Touch device:", checkTouchDevice()); // Display result on page document.body.innerHTML = "Touch Device: " + checkTouchDevice() + ""; Enhanced Touch Detection Method For better compatibility ...
Read MoreHow to choose between `window.URL.createObjectURL()` and `window.webkitURL.createObjectURL()` based on browser?
When working with file blobs in JavaScript, different browsers may support different implementations of createObjectURL(). Modern browsers use window.URL.createObjectURL(), while older WebKit browsers used window.webkitURL.createObjectURL(). Browser Compatibility Issue The webkitURL prefix was used in older versions of Chrome and Safari, while modern browsers have standardized on URL.createObjectURL(). Creating a Cross-Browser Wrapper Function To handle both cases, create a wrapper function that checks for browser support: function createObjectURL(file) { if (window.URL && window.URL.createObjectURL) { return window.URL.createObjectURL(file); } else if (window.webkitURL) { ...
Read MoreHow to workaround Objects vs arrays in JavaScript for key/value pairs?
When you need key-value pairs in JavaScript, objects are the preferred choice over arrays. Objects provide direct key-based lookup, making data retrieval more efficient than searching through array indices. Why Objects Over Arrays for Key-Value Pairs Arrays use numeric indices and are optimized for ordered data, while objects are designed for key-value associations. Using objects allows you to access values directly by their keys. Basic Object Syntax Store key-value pairs using object literal syntax: var players = { 600: 'Sachin', 300: 'Brad' }; console.log(players[600]); // ...
Read MoreHTML5 and Amazon S3 Multi-Part uploads
Amazon S3 multi-part uploads allow you to upload large files in smaller chunks, providing better reliability and performance. When combined with the HTML5 File API, you can create powerful client-side upload functionality. Overview of S3 Multi-Part Uploads Amazon S3 multi-part upload is a feature that enables you to upload a single object as a set of parts. Each part is a contiguous portion of the object's data, and you can upload these parts independently and in any order. How HTML5 File API Works with S3 The HTML5 File API provides interfaces for accessing files from web ...
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