时间：2021-07-01 10:21:17 帮助过：9人阅读
<head>
<meta charset='utf-8' />
<title>canvas炫彩小球</title>
<style>
#canvas {
border: 1px dashed #aaa;
}
</style>
<script>
function Ball(x, y, r, color) {
this.x = x || 0;
this.y = y || 0;
this.radius = r || 20;
this.color = color || '#09f';
}
Ball.prototype = {
constructor: Ball,
stroke: function (cxt) {
cxt.strokeStyle = this.color;
cxt.beginPath();
cxt.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
cxt.closePath();
cxt.stroke();
},
fill: function (cxt) {
cxt.fillStyle = this.color;
cxt.beginPath();
cxt.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
cxt.closePath();
cxt.fill();
},
update : function( balls ){
this.x += this.vx;
this.y += this.vy;
this.radius--;
if ( this.radius < 0 ) {
for( var i = 0; i < balls.length; i++ ){
if( balls[i] == this ) {
balls.splice( i, 1 );
}
}
return false;
}
return true;
}
}
</script>
<script>
window.onload = function () {
var oCanvas = document.querySelector("#canvas"),
oGc = oCanvas.getContext('2d'),
width = oCanvas.width, height = oCanvas.height,
balls = [], n = 50;
function getRandColor() {
return '#' + (function (color) {
return (color += '0123456789abcdef'[Math.floor(Math.random() * 16)]) && (color.length == 6) ? color : arguments.callee(color);
})('');
}
oCanvas.addEventListener( 'mousemove', function( ev ){
var oEvent = ev || event;
var ball = new Ball( oEvent.clientX, oEvent.clientY, 30, getRandColor());
ball.vx = (Math.random() * 2 - 1) * 5;
ball.vy = (Math.random() * 2 - 1) * 5;
balls.push( ball );
}, false );
( function move(){
oGc.clearRect( 0, 0, width, height );
for( var i = 0; i < balls.length; i++ ){
balls[i].update( balls ) && balls[i].fill( oGc );
}
requestAnimationFrame( move );
} )();
}
</script>
</head>
<body>
<canvas id="canvas" width="1200" height="600"></canvas>
</body>以上就是html5 canvas制作一个跟着鼠标移动消失的一堆炫彩小球 的详细内容，更多请关注Gxl网其它相关文章！