jquery how to add rows

JQuery is a free, open source JavaScript library that makes it easy to complete common tasks such as DOM manipulation, event handlers, animation effects, and Ajax using JQuery. In web development, it is often necessary to dynamically update page elements such as tables and lists by adding rows. Below we will explain how JQuery adds rows.

1. Add rows to the table

In HTML, we can use the <table> tag to create a table. In order to add a row to the table, we first need to select a <tbody> element in the table via JQuery and then add a new row to it using the append() method. Here is a sample code:

<table>
  <thead>
    <tr>
      <th>姓名</th>
      <th>年龄</th>
      <th>性别</th>
    </tr>
  </thead>
  <tbody class="table-body">
    <tr>
      <td>张三</td>
      <td>20</td>
      <td>男</td>
    </tr>
    <tr>
      <td>李四</td>
      <td>25</td>
      <td>女</td>
    </tr>
  </tbody>
</table>

<script>
  // 获取 tbody 元素
  var tbody = $('table .table-body');
  
  // 创建一个新行
  var newRow = $('<tr><td>王五</td><td>22</td><td>男</td></tr>');
  
  // 将新行添加到 tbody 中
  tbody.append(newRow);
</script>

In the above code, we first use the $() method to get the <tbody> element in the table, and then use $('<tr>...')</tr> Create a new row and add the new row to tbody. Note that if you want to add multiple rows, you can add multiple rows to an array and then use append() to add them all at once.

2. Add rows to the list

In HTML, we can use the <ul> or <ol> tag to create Sequential or ordered list. In order to add a row to the list, we can use the append() method to add a new <li> element to the list. Here is a sample code:

<ul class="list">
  <li>苹果</li>
  <li>香蕉</li>
  <li>橙子</li>
</ul>

<script>
  // 获取列表元素
  var list = $('ul.list');
  
  // 创建一个新的 li 元素
  var newItem = $('<li>梨子</li>');
  
  // 将新元素添加到列表中
  list.append(newItem);
</script>

In the above code, we first use the $() method to get the list elements, and then use the $('<li>.. .') Creates a new <li> element and adds the new element to the list.

3. Summary

Through the introduction of this article, we have learned how to use JQuery to add rows to a table or list. It can be seen that using JQuery to operate DOM elements is very convenient and fast, and can greatly improve the efficiency of web development. If you haven't tried JQuery yet, you might as well go to the official website to download and learn it. I believe it will bring you a lot of convenience.

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