要将水平滚动条放置在div的中心，请使用向左滚动键。您可以尝试运行以下代码以将水平滚动条放置在div中。
滚动条位于div的中心：
<html>
<head>
<title>jQuery Scroll</title>
<script src = "https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$(document).ready(function(){
var outerContent = $('.demo');
var innerContent = $('.demo > div');
outerContent.scrollLeft( (innerContent.width() - outerContent.width()) / 2);
});
});
</script>
<style>
html, body, div {
margin:0;
padding:0;
}
.demo {
width:400px;
overflow-x:scroll;
}
#viewContainer {
height:120px;
width:1000px;
display:table;
}
.myclass {
width:250px;
height:100%;
display:table-cell;
border:2px solid blue;
}
</style>
</head>
<body>
<div class="demo">
<div id="viewContainer">
<div class="myclass" id="farLeft">Far left</div>
<div class="myclass" id="left">left</div>
<div class="myclass" id="center">center</div>
<div class="myclass" id="right">right</div>
<div class="myclass" id="farRight">Far right</div>
</div>
</div>
</body>
</html>