Canvas vs. SVG Canvas renders rasterized bitmaps via JavaScript, making it resolution-dependent but highly performant for rendering massive numbers of objects. SVG, conversely, renders vector graphics using XML nodes, integrating natively with the DOM and retaining crispness at any zoom level, thoug...
Project Initialization Initialize a new React application using the Create React App toolchain: npx create-react-app my-application cd my-application npm start Streamline the project structure by retaining only essential files within the src directory: App.js and index.js. Entry Points and Component...
Browsers can render SVG directly when served as a standalone XML file. Define the root element with proper namespace declaration so the engine knows how to parse it. <?xml version="1.0" encoding="UTF-8"?> <svg width="100%" height="100%" version="...
First Round 1、What's the output? Why? var b = 10; (function b(){ b = 20; console.log(b); })(); The output is function b(){}. In this self-invoking function, b is declared as a function. Although b = 20 tries to reassign it, function names have higher priority in their scope. Thus, b still references...
Fundamental Selectors Element selectors target every instance of a specific HTML tag on the page. <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <style> /* Targets all <h2> tags */ h2 { font-family: Arial, sans-serif; } /* Targets all <em> ta...
When scoped styles prevent Element UI style modifications, several solutions exist: Method 1: Remove Scoped Attribute Eliminate the scoped attribute from the style tag. Note this makes styles global, so add specific class names (e.g., modInput) to avoid widespread style pollusion. Method 2: Global S...
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...
The CSS display property dictates how an element generates boxes within the document flow and determines its interaction with sibling nodes. It serves as the foundational mechanism for all layout models, controlling weather a component behaves as a block container, an inline fragment, a flex context...
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...