本文介绍在Layui框架中动态修改表格表头的实现方式。由于table.reload方法暂不支持直接变更配置基础函数，通过删除原表格DOM并重建元素后重新加载的方式实现。文章提供了完整的HTML结构、JavaScript代码示例及点击前后的效果对比，帮助开发者解决动态表头需求。
Layui Table动态修改表头与刷新实现
实现表头动态更新的核心思路是：先移除现有的表格实例，随后重新构建对应的DOM元素，最后执行表格的重新加载操作，从而完成表头的变更。
理解上述原理后，实现过程便相对直观。目前Layui的table.reload(ID, options)方法似乎尚不支持直接修改配置中的基础函数，因此需要采用这种直接操作DOM并结合重新加载的替代方案。虽然方法看似简单直接，但能有效解决问题。
以下是具体的代码实现示例：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="static/layui/css/layui.css" rel="external nofollow" >
</head>
<body>
<div id="myTable">
<table id="demo" lay-filter="test"></table>
</div>
<button id="buttonChangeTitle" class="layui-btn ">点击改变表头</button>
<script type="text/javascript" src="static/layui/layui.js" charset="utf-8"></script>
<script>
layui.use(['element', 'jquery', 'table'], function () {
var $ = layui.jquery
, table = layui.table
, element = layui.element; //Tab的切换功能，切换事件监听等，需要依赖element模块
var data = [
{
"id": 10000,
"username": "user-0",
"sex": "女",
"city": "城市-0",
"sign": "签名-0",
"experience": 255,
"logins": 24,
"wealth": 82830700,
"classify": "作家",
"score": 57
}, {
"id": 10001,
"username": "user-1",
"sex": "男",
"city": "城市-1",
"sign": "签名-1",
"experience": 884,
"logins": 58,
"wealth": 64928690,
"classify": "词人",
"score": 27
}, {
"id": 10002,
"username": "user-2",
"sex": "女",
"city": "城市-2",
"sign": "签名-2",
"experience": 650,
"logins": 77,
"wealth": 6298078,
"classify": "酱油",
"score": 31
}, {
"id": 10003,
"username": "user-3",
"sex": "女",
"city": "城市-3",
"sign": "签名-3",
"experience": 362,
"logins": 157,
"wealth": 37117017,
"classify": "诗人",
"score": 68
}, {
"id": 10004,
"username": "user-4",
"sex": "男",
"city": "城市-4",
"sign": "签名-4",
"experience": 807,
"logins": 51,
"wealth": 76263262,
"classify": "作家",
"score": 6
}, {
"id": 10005,
"username": "user-5",
"sex": "女",
"city": "城市-5",
"sign": "签名-5",
"experience": 173,
"logins": 68,
"wealth": 60344147,
"classify": "作家",
"score": 87
}, {
"id": 10006,
"username": "user-6",
"sex": "女",
"city": "城市-6",
"sign": "签名-6",
"experience": 982,
"logins": 37,
"wealth": 57768166,
"classify": "作家",
"score": 34
}, {
"id": 10007,
"username": "user-7",
"sex": "男",
"city": "城市-7",
"sign": "签名-7",
"experience": 727,
"logins": 150,
"wealth": 82030578,
"classify": "作家",
"score": 28
}, {
"id": 10008,
"username": "user-8",
"sex": "男",
"city": "城市-8",
"sign": "签名-8",
"experience": 951,
"logins": 133,
"wealth": 16503371,
"classify": "词人",
"score": 14
}, {
"id": 10009,
"username": "user-9",
"sex": "女",
"city": "城市-9",
"sign": "签名-9",
"experience": 484,
"logins": 25,
"wealth": 86801934,
"classify": "词人",
"score": 75
}]
var title =
[ //表头
{field: 'id', title: 'ID', width: 80, sort: true, fixed: 'left'}
, {field: 'username', title: '用户名', width: 80}
, {field: 'sex', title: '性别', width: 80, sort: true}
, {field: 'city', title: '城市', width: 80}
, {field: 'sign', title: '签名', width: 177}
, {field: 'experience', title: '积分', width: 80, sort: true}
, {field: 'score', title: '评分', width: 80, sort: true}
, {field: 'classify', title: '职业', width: 80}
, {field: 'wealth', title: '财富', sort: true}
]
var title2 =
[ //表头
{field: 'id', title: 'ID', width: 80, sort: true, fixed: 'left'}
, {field: 'username', title: '用户名', width: 80}
, {field: 'wealth', title: '财富', sort: true}
]
//第一个实例
var tableIns = table.render({
elem: '#demo'
, id: 'demoTest'
, height: 312
// ,url: '/demo/table/user/' //数据接口
, data: data
, page: true //开启分页
, cols: [title]
});
$("#buttonChangeTitle").on("click", function () {
$("#myTable").empty();
$("#myTable").append('<table id="demo"></table>');
//第一个实例
var tableIns2 = table.render({
elem: '#demo'
, id: 'demoTest'
, height: 312
// ,url: '/demo/table/user/' //数据接口
, data: data
, page: true //开启分页
, cols: [title2]
});
})
})
</script>
</body>
</html>点击按钮前的表格显示效果如下：
点击按钮后的表格显示效果如下：
以上关于Layui Table动态修改表头及重新加载表格的方法分享完毕，希望能为遇到类似问题的开发者提供参考。