小球不动。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.ball {
width: 40px;
height: 40px;
border-radius: 20px;
}
.ball {
background: red;
}
.ball2 {
background: yellow;
}
.ball3 {
background: green;
}
</style>
<script src="../promise/1.js">
</script>
</head>
<body>
<div class="ball ball1" style="margin-left: 0px;"></div>
<div class="ball ball2" style="margin-left: 0px;"></div>
<div class="ball ball3" style="margin-left: 0px;"></div>
<script type="text/javascript">
var ball1 = document.querySelector('.ball1');
var ball2 = document.querySelector('.ball2');
var ball3 = document.querySelector('.ball3');
var Promise = window.Promise;
function promiseAnimate(ball, distance) {
return new Promise(function (resolve, reject) {
function _animate(ball, distance,cb) {
setTimeout(function () {
var marginLeft = parseInt(ball.style.marginLeft, 10);
if (marginLeft === distance) {
resolve();
}
else {
if (marginLeft < distance) {
marginLeft++;
}
else {
marginLeft--;
}
ball.style.marginLeft = marginLeft + 'px';
_animate();
}
}, 13)
}
_animate(ball,distance);
})
}
promiseAnimate(ball1, 100)
.then(function () {
return promiseAnimate(ball2, 200)
})
.then(function () {
return promiseAnimate(ball3, 300)
})
.then(function () {
return promiseAnimate(ball3, 150)
})
.then(function () {
return promiseAnimate(ball2, 150)
})
.then(function () {
return promiseAnimate(ball1, 150)
})
</script>
</body>
</html>代码如上，引用的是bluebird.min.js。确认引用上了，只是改名为上述。浏览器是chrome
