Fabric.js provides four primary methods for straightening elements (rotating them to 0°, 90°, 180°, or 270° based on proximity): Core Methods canvas.straightenObject(obj) - Immediate straightening obj.straighten() - Requires manual canvas refresh canvas.fxStraightenObject(obj) - Animated straighteni...
1. Utility Functions Convert File to Base64 function getBase64(file) { return new Promise((resolve, reject) => { const fileReader = new FileReader(); let result = ''; fileReader.readAsDataURL(file); fileReader.onload = () => { result = fileReader.result; }; fileReader.onerror = (error) => {...
Installation CDN <!-- Stylesheet --> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@recogito/annotorious@2.7.10/dist/annotorious.min.css"> <!-- JavaScript --> <script src="https://cdn.jsdelivr.net/npm/@recogito/annotorious@2.7.10/dist/annotor...
jQuery provides two methods for plugin development: jQuery.fn.extend() and jQuery.extend(). jQuery.fn is equivalent to jQuery.prototype. This allows for the addition of methods to the prototype chain, which are then available to all instances of the jQuery class. jQuery.extend(object) adds static me...
The canvas.interactive Property in Fabric.js The interactive property controls whether the Fabric.js canvas responds to user interactions. According to the official documentation: Indicates that canvas is interactive. This property should not be changed. By default, canvas.interactive is set to true...
This article demonstrates three methods to implement a waterfall (masonry) layout: using plain JavaScript, jQuery, and CSS. Method 1: Using JavaScript <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Waterfall Layout</title>...
To create an HSL-based color wheel using Canvas, we can leverage iether small filled arcs acting as color dots or radial lines. Both methods rely on covnerting hue values to radiens and mapping lightness to the distance from the wheel's center. Arc-Based Color Wheel function renderHslWheelArcs(canva...
CSS Fundamentals Block Formatting Context (BFC) BFC represents an isolated rendering environment where elements inside it are independent from outside elements. It helps solve common layout issues like margin collapsing and float clearing. Centering Elements Multiple techniques exist for achieving h...
Centering Elements in CSS Method 1: Absolute Positioning with Calculated Margins When dimensions are known: .parent { width: 500px; height: 500px; position: relative; } .child { width: 200px; height: 200px; position: absolute; top: 150px; left: 150px; } Method 2: Aboslute Positioning with Auto Margi...
Core Concepts of Canvas Canvas is an HTML5 element that provides a scriptable rendreing surface for 2D graphics. It allows dynamic generation of pixel-based images through JavaScript and serves as a foundational technology for web-based data visualization and interactive applications. Distinction Be...