在HTML中，表格(table)是一个重要的元素，用于展示和组织数据，要在表格(table)里添加HTML代码，可以使用<td>(表格单元格)、<th>(表格头部单元格)等标签来定义表格的内容和结构，本文将详细介绍如何在表格里添加HTML代码，并提供相关问题与解答的栏目。
使用<td>标签定义表格单元格
1、<td>标签用于定义表格中的一个单元格，它通常与<tr>(表格行)标签一起使用，表示一行中的一个单元格。
<table>
<tr>
<td>单元格1</td>
<td>单元格2</td>
</tr>
</table>
2、如果需要在单元格中添加内联样式，可以使用style属性。
<table>
<tr>
<td style="color: red; font-weight: bold;">单元格1</td>
<td style="color: blue; font-size: 18px;">单元格2</td>
</tr>
</table>
使用<th>标签定义表格头部单元格
1、<th>标签用于定义表格的头部单元格，它通常与<tr>(表格行)标签一起使用，表示一行中的一个表头单元格。
<table>
<tr>
<th>姓名</th>
<th>年龄</th>
</tr>
<tr>
<td>张三</td>
<td>25</td>
</tr>
</table>
2、如果需要为表头单元格添加排序功能，可以使用JavaScript或jQuery等库来实现，使用jQuery的sortTable()方法：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<table id="myTable">
<thead>
<tr>
<th onclick="sortTable(0)">姓名</th>
<th onclick="sortTable(1)">年龄</th>
</tr>
</thead>
<tbody>
<tr>
<td>张三</td>
<td>25</td>
</tr>
</tbody>
</table>
<script>
function sortTable(n) {
var table, rows, switching, i, x, y, shouldSwitch, dir, switchcount = 0;
table = document.getElementById("myTable");
switching = true;
dir = "asc"; // or "desc" if you want to reverse the order of the columns in the table; default is "asc" for ascending order and "desc" for descending order. You can change this value with the following line of code: table.setAttribute("data-order", dir); but it will only work if you use a data attribute on your table (which I don't recommend doing). If you want to do that instead, just remove the line that sets the dir variable. See below for more information about data attributes and sorting tables. The "s" stands for "switch" and the "w" stands for "within". It means all rows are compared between each other (not just adjacent ones). The "i" is used to loop through all the rows (except for the first one that contains the header information). The "x" and "y" variables represent the two cells that are being compared at any given time. To get the value of a cell, you can use its index (e.g. table.rows[x].cells[y].innerHTML). The "shouldSwitch" variable is true if the current row should switch places with the next row in the sorted order (if there is one). You can customize this behavior by adding your own conditions to the shouldSwitch variable. If you want to add a third column to sort by age and name at the same time, you can do so by adding another column with an onclick attribute like this: <th onclick="sortTable(2)">Age</th><th onclick="sortTable(3)">Name</th><th onclick="sortTable(4)">Age & Name</th><th onclick="sortTable(5)">Age & Name (Descending)</th></tr></thead><tbody><tr><td id="cell_0">张三</td><td id="cell_1">25</td><td id="cell_2"></td><td id="cell_3"></td><td id="cell_4"></td><td id="cell_5"></td></tr></tbody></table><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-tablesorter/2.31.3/js/jquery.tablesorter.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-tablesorter/2.31.3/js/widgets/widget-datepickerui.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-tablesorter/2.31.3/js/widgets/widget-selectivity.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-tablesorter/2.31.3/js/widgets/widget-highlighters-plugin.min
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