昔書いたコードをIE用にトランスコンパイルしてみました。
これで、IE10、IE11でも動くようになったと思います。
DEMO
JavaScript
"use strict"; var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } var Progress = function () { function Progress() { var param = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0]; _classCallCheck(this, Progress); this.timestamp = null; this.duration = param.duration || Progress.CONST.DURATION; this.progress = 0; this.delta = 0; this.progress = 0; this.isLoop = !!param.isLoop; this.reset(); } Progress.prototype.reset = function reset() { this.timestamp = null; }; Progress.prototype.start = function start(now) { this.timestamp = now; }; Progress.prototype.tick = function tick(now) { if (this.timestamp) { this.delta = now - this.timestamp; this.progress = Math.min(this.delta / this.duration, 1); if (this.progress >= 1 && this.isLoop) { this.start(now); } return this.progress; } else { return 0; } }; _createClass(Progress, null, [{ key: "CONST", get: function get() { return { DURATION: 1000 }; } }]); return Progress; }(); var Confetti = function () { function Confetti(param) { _classCallCheck(this, Confetti); this.parent = param.elm || document.body; this.canvas = document.createElement("canvas"); this.ctx = this.canvas.getContext("2d"); this.width = param.width || this.parent.offsetWidth; this.height = param.height || this.parent.offsetHeight; this.length = param.length || Confetti.CONST.PAPER_LENGTH; this.yRange = param.yRange || this.height * 2; this.progress = new Progress({ duration: param.duration, isLoop: true }); this.rotationRange = typeof param.rotationLength === "number" ? param.rotationRange : 10; this.speedRange = typeof param.speedRange === "number" ? param.speedRange : 10; this.sprites = []; this.canvas.style.cssText = ["display: block", "position: absolute", "top: 0", "left: 0", "pointer-events: none"].join(";"); this.render = this.render.bind(this); this.build(); this.parent.appendChild(this.canvas); this.progress.start(performance.now()); requestAnimationFrame(this.render); } Confetti.prototype.build = function build() { for (var i = 0; i < this.length; ++i) { var canvas = document.createElement("canvas"), ctx = canvas.getContext("2d"); canvas.width = Confetti.CONST.SPRITE_WIDTH; canvas.height = Confetti.CONST.SPRITE_HEIGHT; canvas.position = { initX: Math.random() * this.width, initY: -canvas.height - Math.random() * this.yRange }; canvas.rotation = this.rotationRange / 2 - Math.random() * this.rotationRange; canvas.speed = this.speedRange / 2 + Math.random() * (this.speedRange / 2); ctx.save(); ctx.fillStyle = Confetti.CONST.COLORS[Math.random() * Confetti.CONST.COLORS.length | 0]; ctx.fillRect(0, 0, canvas.width, canvas.height); ctx.restore(); this.sprites.push(canvas); } }; Confetti.prototype.render = function render(now) { var progress = this.progress.tick(now); this.canvas.width = this.width; this.canvas.height = this.height; for (var i = 0; i < this.length; ++i) { this.ctx.save(); this.ctx.translate(this.sprites[i].position.initX + this.sprites[i].rotation * Confetti.CONST.ROTATION_RATE * progress, this.sprites[i].position.initY + progress * (this.height + this.yRange)); this.ctx.rotate(this.sprites[i].rotation); this.ctx.drawImage(this.sprites[i], -Confetti.CONST.SPRITE_WIDTH * Math.abs(Math.sin(progress * Math.PI * 2 * this.sprites[i].speed)) / 2, -Confetti.CONST.SPRITE_HEIGHT / 2, Confetti.CONST.SPRITE_WIDTH * Math.abs(Math.sin(progress * Math.PI * 2 * this.sprites[i].speed)), Confetti.CONST.SPRITE_HEIGHT); this.ctx.restore(); } requestAnimationFrame(this.render); }; _createClass(Confetti, null, [{ key: "CONST", get: function get() { return { SPRITE_WIDTH: 9, SPRITE_HEIGHT: 16, PAPER_LENGTH: 100, DURATION: 8000, ROTATION_RATE: 50, COLORS: ["#EF5350", "#EC407A", "#AB47BC", "#7E57C2", "#5C6BC0", "#42A5F5", "#29B6F6", "#26C6DA", "#26A69A", "#66BB6A", "#9CCC65", "#D4E157", "#FFEE58", "#FFCA28", "#FFA726", "#FF7043", "#8D6E63", "#BDBDBD", "#78909C"] }; } }]); return Confetti; }(); (function () { var DURATION = 8000, LENGTH = 120; new Confetti({ width: window.innerWidth, height: window.innerHeight, length: LENGTH, duration: DURATION }); setTimeout(function () { new Confetti({ width: window.innerWidth, height: window.innerHeight, length: LENGTH, duration: DURATION }); }, DURATION / 2); })();
