

The jquery method to realize the table serial number changing with the automatic addition of rows is: 1. Create an html file and introduce the jQuery file; 2. Use the "table" tag to create a table with the id value "myTable"; 3. jQuery The "DataTables" plug-in is used in the code to manage the table; 4. Then listen to the add row event and delete row event, and call the `draw(false)` method to draw, and then use `updateRowIds` to update the serial number.
Operating system for this tutorial: Windows 10 system, jQuery3.6.0 version, Dell G3 computer.
The way jquery implements the table serial number to change with the automatic addition of rows is:
HTML code:
<table id="myTable"> <thead> <tr> <th>ID</th> <th>Name</th> <th>Age</th> </tr> </thead> <tbody> <tr> <td>1</td> <td>John</td> <td>25</td> </tr> <tr> <td>2</td> <td>Jane</td> <td>30</td> </tr> </tbody> </table>
jQuery code:
$(document).ready(function() { var table = $('#myTable').DataTable(); // 监听添加行事件 $('#addRowBtn').on('click', function() { table.row.add([ '', // 空序号,插入后由函数进行自动编号 '', '' ]).draw(false); updateRowIds(); }); // 监听删除行事件 $('#myTable tbody').on('click', '.deleteRowBtn', function() { table .row($(this).parents('tr')) .remove() .draw(); updateRowIds(); }); // 更新序号字段值 function updateRowIds() { $('#myTable tbody tr').each(function(index, row) { $(row).find('td:first-child').text(index + 1); }); } });
First, in HTML , we have a table with ID `myTable`, which contains three columns: ID, Name and Age.
In the jQuery code, we use the DataTables plug-in to manage tables. In the `ready` function, we initialize the DataTables instance and store it in the `table` variable.
Then, we listened to the add row event and delete row event. When the user clicks the add button, we will add a row to the DataTables instance and immediately call the `draw(false)` method to draw (the parameter false passed in when running this method means that the table will not be rearranged), and then use `updateRowIds `Just update the serial number.
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