废话不多说，直接代码。
<!DOCTYPE>
<html>
<head>
<meta charset="utf-8"/>
<script src="jquery.js"></script>
<script src="./dist/jquery.fixed.table.js"></script>
<script src="./dist/index.js"></script>
<link rel="stylesheet/less" type="text/css" href="index.less" />
<script src="./node_modules/less/dist/less.js"></script>
</head>
<body>
<div>
<table>
<thead>
<tr>
<th>姓名</th>
<th>年龄</th>
<th>班级</th>
<th>性别</th>
<th>成绩</th>
</tr>
</thead>
<tbody>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
<tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr><tr>
<td>张dddd三</td>
<td>25</td>
<td>3班</td>
<td>男</td>
<td>80</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>
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this.dom = $(this);
this.thead = this.dom.find('thead');
this.tbody = this.dom.find('tbody');
this.fixedTop = this.options.fixedTop;
this.dom.parent().scroll(function() {
var scrollTop = $(this).scrollTop();
if (scrollTop >= self.fixedTop) {
self.setFix();
} else {
self.clearFix();
}
});
this.setFix = function() {
if (this.dom.parent().find('.fixed-table').length) {
return;
}
this.dom.parent().prepend(`<div class="fixed-table">${this.getThead()}</div>`);
}
this.clearFix = function() {
this.dom.parent().find('.fixed-table').remove();
}
this.getThead = function() {
var headHtml = '';
this.thead.find('th').each(function () {
var _w = $(this).width();
var _v = $(this).text();
headHtml += `<div style=" ${_w}px;">${_v}</div>`;
});
return headHtml;
}
this.onresize = function() {
this.thead.find('th').each(function () {
var _w = $(this).width();
var _i = $(this).index();
self.parent().find(`.fixed-table div:eq(${_i})`).width(_w);
});
}
$(window).resize(function () {
self.onresize();
});
}
})($);
效果：
