How to modify table content using jQuery

JQuery is a well-known JavaScript library that helps write JavaScript code.

jQuery can use some simple syntax and functions to achieve some complex tasks. For example, if you want to operate some tables on a web page, you can use jQuery to achieve it.

Let’s take a look at how to use jQuery to modify the table content.

1. Basic syntax

The basic syntax of jQuery is $(selector).action(), where selector represents the element to be selected and action represents the action to be performed on the element action.

For example, if you want to select the table element with the ID "myTable" and change the first cell content of all its rows to "Hello, world!", you can use the following code:

$("#myTable tr td:first-child").html("Hello, world!");

Among them, the $ sign is the entry point of the jQuery selector. Here, it will get the table elements based on the selector we provide. In this example, the selector is $("#myTable tr td:first-child"). The selector means to select the first cell (td) of each row (tr) in the table element with the id "myTable".

Then, we use the .html("Hello, World!") method to set its content to "Hello, World!".

2. Modify cell content

We assume that we want to modify the content of a certain cell to "Welcome to jQuery!" (for example, the table with the id "myTable" cell in row 2 and column 3), you can use the following code:

$("#myTable tr:nth-child(2) td:nth-child(3)").html("Welcome to jQuery!");

This selector means to select the cell in row 2 and column 3 of the table element with the id "myTable", And modify its content to "Welcome to jQuery!".

3. Modify table row

If you want to modify the content of the entire row, just use a simpler selector, such as:

$("#myTable tr:nth-child(2)").html("<td>Hello,</ td><td>World!</ td>");

This statement The selector selects row 2 in the table element with the id "myTable" and modifies its content to two cells: the first cell content is "Hello," and the second cell content is "World! ".

4. Modify table columns

If you need to add or modify table columns, you can use the insertBefore and insertAfter methods. For example, if you need to add a new column after column 2 of the table with the id "myTable", you can use the following code:

$("#myTable tr").each(function(){
    $(this).find("td:nth-child(2)").after("<td>New Column</td>");
});

In this example, we use jQuery's .each () method loops through each row. We then use the .find() method to select the 2nd column cell in each row and use the .after() method to add a new column cell: "New Column" .

5. Summary

In this article, we introduced some examples of how to modify table content using jQuery. I hope these examples can help you better understand jQuery and provide you with some help in web development. Of course, in practical applications, we can use more jQuery operations to modify the table content. We hope readers can continue to learn and master it in depth.

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