Spinner

Developer
Sylvain Reucherand
Size
4,080 Kb
Views
44,528
  1. Spinner Previews
  2. Spinner HTML Codes
  3. Spinner CSS Codes
  4. Spinner JS Codes

How do I make an spinner?

A little infinite spinner made in pure canvas.. What is a spinner? How do you make a spinner? This script and codes were developed by Sylvain Reucherand on 07 November 2022, Monday.

Spinner Previews
IQ Test

Spinner - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Spinner</title> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css"> <link rel="stylesheet" href="css/style.css">
</head>
<body> <script src='https://facebook.github.io/rebound-js/rebound.js'></script> <script src="js/index.js"></script>
</body>
</html>

Spinner - Script Codes CSS Codes

canvas { left: 50%; margin-left: -80px; margin-top: -80px; position: fixed; top: 50%;
}

Spinner - Script Codes JS Codes

'use strict';
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var easeInOutQuart = function easeInOutQuart(t, b, c, d) { if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b; return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
};
var Wheel = function () { function Wheel(s) { _classCallCheck(this, Wheel); this.canvas = document.createElement('canvas'); this.context = this.canvas.getContext('2d'); this.width = s; this.height = s; this.radius = s / 2; this.started = 0; this.elapsed = 0; this.duration = 1500; } Wheel.prototype.init = function init() { this.canvas.width = this.width; this.canvas.height = this.height; this.canvas.style.width = this.width; this.canvas.style.height = this.height; this.started = Date.now(); }; Wheel.prototype.update = function update(dt) { this.elapsed += dt; this.progress = this.elapsed / this.duration; this.progress = this.progress > 1 && 1 || this.progress; }; Wheel.prototype.render = function render() { var progress = easeInOutQuart(this.progress, 0, 1, 1); this.context.clearRect(0, 0, this.width, this.height); var offsetX = this.width / 2; var offsetY = this.height / 2; var radius = Math.max(0, progress * this.radius); var angle = progress * Math.PI * 2; var x = Math.cos(angle - Math.PI) * (this.radius - radius) + offsetX; var y = Math.sin(angle - Math.PI) * (this.radius - radius) + offsetY; this.context.fillStyle = '#af3063'; this.context.strokeStyle = '#af3063'; this.context.save(); this.context.beginPath(); this.context.arc(offsetX, offsetY, this.radius, 0, 2 * Math.PI); this.context.fill(); this.context.globalCompositeOperation = 'source-in'; var x2 = Math.cos(-angle) * radius; var y2 = Math.sin(-angle) * radius; this.context.beginPath(); this.context.arc(offsetX + x2, offsetY - y2, this.radius, angle, angle + Math.PI); this.context.lineWidth = radius * 2; this.context.stroke(); this.context.restore(); this.context.beginPath(); this.context.arc(x, y, radius, 0, 2 * Math.PI); this.context.fill(); }; return Wheel;
}();
var Spinner = function () { function Spinner(s) { _classCallCheck(this, Spinner); this.canvas = document.createElement('canvas'); this.context = this.canvas.getContext('2d'); this.width = s; this.height = s; this.wheels = []; this.update = this.update.bind(this); document.body.appendChild(this.canvas); this.time = 0; } Spinner.prototype.init = function init() { this.canvas.width = this.width; this.canvas.height = this.height; this.canvas.style.width = this.width; this.canvas.style.height = this.height; this.time = Date.now(); }; Spinner.prototype.start = function start() { this.tick(); this.update(); }; Spinner.prototype.tick = function tick() { var wheel = new Wheel(this.width); wheel.init(); this.wheels.push(wheel); }; Spinner.prototype.update = function update() { window.requestAnimationFrame(this.update); var now = Date.now(); var dt = now - this.time; if (this.wheels.slice(-1)[0].progress === 1) { if (this.wheels.length + 1 > 4) { this.wheels = []; } this.tick(); } for (var i = 0, wheel; i < this.wheels.length; i++) { wheel = this.wheels[i]; wheel.update(dt); } this.time = now; this.render(); }; Spinner.prototype.render = function render() { this.context.clearRect(0, 0, this.width, this.height); this.context.globalCompositeOperation = 'source-over'; for (var i = 0, wheel; i < this.wheels.length; i++) { wheel = this.wheels[i]; wheel.render(); this.context.save(); if (!!(i % 2)) { this.context.globalCompositeOperation = 'destination-out'; } this.context.drawImage(wheel.canvas, 0, 0, this.width, this.height); this.context.restore(); } this.context.globalCompositeOperation = 'destination-in'; this.context.beginPath(); this.context.arc(this.width / 2, this.height / 2, this.width / 2 - 3, 0, 2 * Math.PI); this.context.fill(); }; return Spinner;
}();
var spinner = new Spinner(160);
spinner.init();
spinner.start();
Spinner - Script Codes
Spinner - Script Codes
Home Page Home
Developer Sylvain Reucherand
Username sreucherand
Uploaded November 07, 2022
Rating 4.5
Size 4,080 Kb
Views 44,528
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