Modify table in jquery

jQuery (pronounced "jackway") is a popular JavaScript library used to simplify DOM manipulation, special effects processing, and event response in web development. By using jQuery, you can easily modify the properties and styles of HTML tables. In this article, we will discuss how to use jQuery to modify the content, style, and add rows and columns of an HTML table.

Modify table content

Modifying table content is achieved by manipulating the text content of HTML elements. In jQuery, you can use the .text() method to get and set the text content of an element. Here is an example that shows how to use jQuery to modify the first row in a table to "This is the new header":

<table>
    <tr>
        <th>旧表头1</th>
        <th>旧表头2</th>
        <th>旧表头3</th>
    </tr>
    <tr>
        <td>内容1-1</td>
        <td>内容1-2</td>
        <td>内容1-3</td>
    </tr>
    <tr>
        <td>内容2-1</td>
        <td>内容2-2</td>
        <td>内容2-3</td>
    </tr>
</table>

$("table tr:first th:first").text("这是新的表头");

In this example, the selector $("table tr:first th: first") selects the first cell in the table. Then, use the .text() method to modify its text content to "This is the new table header."

Modify table style

Table style can be controlled with CSS. jQuery provides several methods to manipulate the styles of elements. The most commonly used are the .addClass() and .removeClass() methods. These methods add or remove classes to the element, thereby modifying its style. The following code demonstrates how to use jQuery to turn a row in a table into a blue background color:

<table>
    <tr>
        <th>表头1</th>
        <th>表头2</th>
        <th>表头3</th>
    </tr>
    <tr>
        <td>内容1-1</td>
        <td>内容1-2</td>
        <td>内容1-3</td>
    </tr>
    <tr>
        <td>内容2-1</td>
        <td>内容2-2</td>
        <td>内容2-3</td>
    </tr>
</table>

$("table tr:nth-child(2)").addClass("blue-background");

In this example, use the selector $("table tr:nth-child(2)") to select the table The second line in , which is the content line. Then, add the "blue-background" style to the row using the .addClass("blue-background") method.

Add rows and columns

To add new rows and columns to the table, you need to use jQuery's .append() method. This method adds a new element at the end of the specified element. Here is an example that demonstrates how to add a row to the end of a table using jQuery:

<table>
    <tr>
        <th>表头1</th>
        <th>表头2</th>
        <th>表头3</th>
    </tr>
    <tr>
        <td>内容1-1</td>
        <td>内容1-2</td>
        <td>内容1-3</td>
    </tr>
    <tr>
        <td>内容2-1</td>
        <td>内容2-2</td>
        <td>内容2-3</td>
    </tr>
</table>

$("table").append("<tr><td>新内容1</td><td>新内容2</td><td>新内容3</td></tr>");

In this example, the table element is selected using the $("table") selector. Then, use the .append() method to add a row of a34de1251f0d9fe1e645927f19a896e8 elements to the table, and add three b6c5a531a458a2e790c1fd6421739d1c elements within it, each containing new content.

Here is an example that demonstrates how to add a column to a table using jQuery:

<table>
    <tr>
        <th>表头1</th>
        <th>表头2</th>
        <th>表头3</th>
    </tr>
    <tr>
        <td>内容1-1</td>
        <td>内容1-2</td>
        <td>内容1-3</td>
    </tr>
    <tr>
        <td>内容2-1</td>
        <td>内容2-2</td>
        <td>内容2-3</td>
    </tr>
</table>

$("table tr").each(function () {
    $(this).append("<td>新内容</td>");
});

In this example, the selector $("table tr") selects each row in the table. Then, use the .each() method to iterate through each row, and use the .append() method to add a b6c5a531a458a2e790c1fd6421739d1c element containing the new content to the end of each row.

Conclusion

In this article, we learned how to use jQuery to modify the content and style of an HTML table, and how to add new rows and columns to the table. By understanding these technologies, developers can more easily create dynamic, interactive HTML tables, thereby improving user experience. When developing forms, it is recommended to use JavaScript frameworks such as jQuery instead of handwritten code to improve development efficiency and code quality.

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