confetti.js

var maxParticleCount=150;var particleSpeed=2;var startConfetti;var stopConfetti;var toggleConfetti;var removeConfetti;(function(){startConfetti=startConfettiInner;stopConfetti=stopConfettiInner;toggleConfetti=toggleConfettiInner;removeConfetti=removeConfettiInner;var colors=["DodgerBlue","OliveDrab","Gold","Pink","SlateBlue","LightBlue","Violet","PaleGreen","SteelBlue","SandyBrown","Chocolate","Crimson"]
var streamingConfetti=false;var animationTimer=null;var particles=[];var waveAngle=0;function resetParticle(particle,width,height){particle.color=colors[(Math.random()*colors.length)|0];particle.x=Math.random()*width;particle.y=Math.random()*height-height;particle.diameter=Math.random()*10+5;particle.tilt=Math.random()*10-10;particle.tiltAngleIncrement=Math.random()*0.07+0.05;particle.tiltAngle=0;return particle;}
function startConfettiInner(){var width=window.innerWidth;var height=window.innerHeight;window.requestAnimFrame=(function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(callback){return window.setTimeout(callback,16.6666667);};})();var canvas=document.getElementById("confetti-canvas");if(canvas===null){canvas=document.createElement("canvas");canvas.setAttribute("id","confetti-canvas");canvas.setAttribute("style","display:block;z-index:999999;pointer-events:none");document.body.appendChild(canvas);canvas.width=width;canvas.height=height;window.addEventListener("resize",function(){canvas.width=window.innerWidth;canvas.height=window.innerHeight;},true);}
var context=canvas.getContext("2d");while(particles.length<maxParticleCount)
particles.push(resetParticle({},width,height));streamingConfetti=true;if(animationTimer===null){(function runAnimation(){context.clearRect(0,0,window.innerWidth,window.innerHeight);if(particles.length===0)
animationTimer=null;else{updateParticles();drawParticles(context);animationTimer=requestAnimFrame(runAnimation);}})();}}
function stopConfettiInner(){streamingConfetti=false;}
function removeConfettiInner(){stopConfetti();particles=[];}
function toggleConfettiInner(){if(streamingConfetti)
stopConfettiInner();else
startConfettiInner();}
function drawParticles(context){var particle;var x;for(var i=0;i<particles.length;i++){particle=particles[i];context.beginPath();context.lineWidth=particle.diameter;context.strokeStyle=particle.color;x=particle.x+particle.tilt;context.moveTo(x+particle.diameter/2,particle.y);context.lineTo(x,particle.y+particle.tilt+particle.diameter/2);context.stroke();}}
function updateParticles(){var width=window.innerWidth;var height=window.innerHeight;var particle;waveAngle+=0.01;for(var i=0;i<particles.length;i++){particle=particles[i];if(!streamingConfetti&&particle.y<-15)
particle.y=height+100;else{particle.tiltAngle+=particle.tiltAngleIncrement;particle.x+=Math.sin(waveAngle);particle.y+=(Math.cos(waveAngle)+particle.diameter+particleSpeed)*0.5;particle.tilt=Math.sin(particle.tiltAngle)*15;}
if(particle.x>width+20||particle.x<-20||particle.y>height){if(streamingConfetti&&particles.length<=maxParticleCount)
resetParticle(particle,width,height);else{particles.splice(i,1);i--;}}}}})();