<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div{width: 100px;height: 30px;background-color: red;margin-top: 30px;}
</style>
<script>
window.onload = function(){
var DIVS = document.getElementsByTagName("div");
for(var i = 0; i < DIVS.length; i++){
DIVS[i].onmouseover = function(){
startMove(this,500);
}
DIVS[i].onmouseout = function(){
startMove(this,100);
}
}
}
var timer = null;
function startMove(node,target){
clearInterval(timer);
timer = setInterval(function(){
var speed = (target - node.offsetWidth) / 8;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if(node.offsetWidth == target){
clearInterval(timer);
}else{
node.style.width = node. offsetWidth + speed + "px";
}
},30);
}
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>我设置了四个DIV，为什么我鼠标滑过第一个div快速进入第二个div时第一个div会长度会固定住而不是变回100？
因为你共用了一个timer，每次执行前你都会清除，script部分可以这样修改，注意for循环内要用let噢
window.onload = function () {
var DIVS = document.getElementsByTagName("div");
for (let i = 0; i < DIVS.length; i++) {
DIVS[i].onmouseover = function () {
startMove(this, 500, i);
};
DIVS[i].onmouseout = function () {
startMove(this, 100, i);
};
}
};
let timer = [];
function startMove(node, target, index) {
clearInterval(timer[index]);
timer[index] = setInterval(function () {
var speed = (target - node.offsetWidth) / 8;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if (node.offsetWidth == target) {
clearInterval(timer[index]);
} else {
node.style.width = node.offsetWidth + speed + "px";
}
}, 30);
}
如有帮助请采纳回答 谢谢