请大佬看看，要怎么解决这个bug呢。<!DOCTYPE html><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>RunJS</title> <style>img{border: none;}#demo {position: relative;background: red;overflow:hidden;width: 500px;}#indemo {float: left;width: 800%;}#demo1 {float: left;}#demo2 {float: left;}</style> <body> <div id="demo"><div id="indemo"><div id="demo1"><a href="#"><img src="img/1.png" border="0" /></a><a href="#"><img src="img/2.png" border="0" /></a><a href="#"><img src="img/3.png" border="0" /></a><a href="#"><img src="img/4.png" border="0" /></a><a href="#"><img src="img/5.png" border="0" /></a><a href="#"><img src="img/6.png" border="0" /></a></div><div id="demo2"></div></div></div><div> <p id="tab"></p> <p id="tab2"></p></div> <script>var speed=10; //数字越大速度越慢var tab=document.getElementById("demo");var tab1=document.getElementById("demo1");var tab2=document.getElementById("demo2");tab2.innerHTML=tab1.innerHTML;function Marquee(){ document.getElementById('tab').innerHTML=tab.scrollLeft document.getElementById('tab2').innerHTML=tab2.offsetWidth if(tab2.offsetWidth-tab.scrollLeft<=0)tab.scrollLeft-=tab1.offsetWidthelse{tab.scrollLeft++;}}var MyMar=setInterval(Marquee,speed);tab.onmouseover=function() {clearInterval(MyMar)};tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)};</script> </body></html>
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stone310
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测试了一下，scrollleft的变化值，当页面缩小时，只有取缩小的整数倍才发生变化（例如缩小2倍，就要2的倍数）；具体原理可能跟scrollleft属性相关；建议做无缝还是用absolute然后left控制更稳定
写了个把你的代码修改了下，可以看的更清楚，你可以测试一下
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>RunJS</title>
<style>
img{border: none;}
#demo { position: relative; background: red; overflow:hidden; width: 500px; }
#indemo { float: left; width: 800%; }
#demo1 { float: left; }
#demo2 { float: left; }
</style>
</head>
<body>
<div id="demo">
<div id="indemo">
<div id="demo1">
<a href="#"><img src="img/1.png" border="0" /></a>
<a href="#"><img src="img/2.png" border="0" /></a>
<a href="#"><img src="img/3.png" border="0" /></a>
<a href="#"><img src="img/4.png" border="0" /></a>
<a href="#"><img src="img/5.png" border="0" /></a>
<a href="#"><img src="img/6.png" border="0" /></a>
</div>
<div id="demo2"></div>
</div>
</div>
<div>
<p id="tab"></p>
<p id="tab2"></p>
</div>
<p style="font-size:30px"><b>用键盘左右键控制以下拉杆</b></p>
<input type="range" min="0" max="100" id="range1" style="width:1000px;" value="0" autofocus/>
<script>
var speed=10; //数字越大速度越慢
var tab=document.getElementById("demo");
var tab1=document.getElementById("demo1");
var tab2=document.getElementById("demo2");
var range1=document.getElementById("range1")
tab2.innerHTML=tab1.innerHTML;
var range=0
var a
range1.onchange=function(){
range=parseInt(range1.value)
}
function Marquee(){
a=tab.scrollLeft;
if(tab2.offsetWidth-tab.scrollLeft<=0){
tab.scrollLeft-=tab1.offsetWidth
}
else{
tab.scrollLeft=tab.scrollLeft+range;
document.getElementById('tab').innerHTML="当前设置的移动的速度是:"+range
document.getElementById('tab2').innerHTML="scrollLeft对应变化值是"+( tab.scrollLeft-a)
}
}
var MyMar=setInterval(Marquee,speed);
tab.onmouseover=function() {clearInterval(MyMar)};
tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)};
</script>
</body>
</html>
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