主要是通過event對象擷取滑鼠目前點選位置
然後css3—》 transition: left 1s linear, top 1s ease-in;
實作抛物線（小球移動時向右和向上的速度不一緻 ，一個快一個慢，進而實作抛物線）關于這個文章中css3中的linear和 ease-in**
<!DOCTYPE html>
<html lang="en" style="width:100%;height:100%;">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<style>
* {
padding: 0;
margin: 0;
}
#ball {
width:12px;
height:12px;
background: #5EA345;
border-radius: 50%;
position: fixed;
transition: left 1s linear, top 1s ease-in;
}
</style>
<title>CSS3 水準抛物線動畫</title>
</head>
<body style="width:100%;height:100%;">
<div id="ball"></div>
</body>
<script>
var $ball = document.getElementById('ball');
document.body.onclick = function (evt) {
console.log(evt.pageX,evt.pageY)
$ball.style.top = evt.pageY+'px';
$ball.style.left = evt.pageX+'px';
$ball.style.transition = 'left 0s, top 0s';
setTimeout(()=>{
// $ball.style.top = window.innerHeight+'px';
$ball.style.top = '0px';
$ball.style.left = '900px';
$ball.style.transition = 'left 1s linear, top 1s ease-in';
}, 20)
}
</script>
</html>
![CSS 動畫專題（transition,animation,transform）1.目标及知識點：2.transition2.animation2.2 animation三個事件監聽： 3.transform 2D4.transform 3D5.requestAnimationFarme動畫幀6.Tween 動畫公式7.動畫架構mTween的使用8.動畫架構mTween示例—無縫滾動幻燈片[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)