<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
* {
padding: 0;
margin: 0
}
.wrapper {
border: 1px solid black;
position: absolute;
}
.ball {
position: inherit;
width: 100px;
height: 100px;
border-radius: 50%;
background-image: radial-gradient(100px 100px at 50px 20px, #a0b3d6, #34538b);
cursor: move;
top: 100px;
left: 500px
}
</style>
</head>
<body>
<h1>向左右拖动小球</h1>
<div class="wrapper">
<div id="myball" draggable="true" class="ball"></div>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
crossorigin="anonymous"></script>
<script src="tween.js"></script>
<script>
window.addEventListener("DOMContentLoaded", function (e) {
(function () {
var curBall;
var beginValue;
var changeValue;
var endValue;
$(document.body).on(
{
"mousedown": function (e) {
curBall = e.target;
endValue = curBall.offsetLeft
}
}, ".ball")
$(document).bind(
{
"mousemove": function (e) {
if (curBall) {
$(curBall).css({ left: e.clientX - (curBall.offsetWidth / 2) + "px" });
}
},
"mouseup": function (e) {
if (curBall) {
beginValue=curBall.offsetLeft;
changeValue =endValue-beginValue;
var haha = curBall;
curBall = null;
var shit = function (count) {
if (count < 100) {
window.requestAnimationFrame(function () {
var l = Tween.Bounce.easeOut(count, beginValue, changeValue, 100);
$(haha).css({ "left": l + "px" })
shit(count + 1)
})
}
}
$(curBall).css({"left":"0px"})
shit(0)
}
}
})
})();
})
</script>
</body>
</html>
