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HTML5 `<canvas>` rendering inconsistencies in Chrome vs Firefox

đź‘€ Views: 48 đź’¬ Answers: 1 đź“… Created: 2025-06-06
html5 canvas cross-browser JavaScript

I've looked through the documentation and I'm still confused about I'm working on a personal project and I'm experiencing rendering inconsistencies while using the `<canvas>` element in my HTML5 application. Specifically, I have a drawing application where users can draw shapes on the canvas, but the output looks different in Chrome (version 118) compared to Firefox (version 115). In Chrome, some shapes appear pixelated and lack the smooth edges I expect, while in Firefox they render perfectly. Here’s a snippet of my drawing code: ```javascript const canvas = document.getElementById('myCanvas'); const ctx = canvas.getContext('2d'); function drawCircle(x, y, radius) { ctx.beginPath(); ctx.arc(x, y, radius, 0, Math.PI * 2); ctx.fillStyle = 'rgba(255, 0, 0, 0.5)'; ctx.fill(); ctx.strokeStyle = 'blue'; ctx.stroke(); } // Draw on the canvas drawCircle(100, 100, 50); ``` I've adjusted the canvas size via CSS and used `devicePixelRatio` to ensure scaling is applied correctly: ```css #myCanvas { width: 400px; height: 400px; } ``` ```javascript canvas.width = 400 * window.devicePixelRatio; canvas.height = 400 * window.devicePixelRatio; ctx.scale(window.devicePixelRatio, window.devicePixelRatio); ``` Despite these adjustments, the circle’s edges remain jagged in Chrome. I've tried checking for any CSS styles that might be affecting the canvas but came up empty. Is there something specific to Chrome’s rendering engine that I need to consider, or am I missing a configuration that would help ensure consistent rendering across browsers? Any insights or suggestions would be greatly appreciated! My development environment is Ubuntu. What's the best practice here? I'd really appreciate any guidance on this.