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Use jquery to implement partial refresh td

WBOYOriginal: 2023-05-23 21:35:07654browse

In modern web development, we often need to use AJAX to update part of the page content, and jQuery is a very popular JavaScript library. It provides simple syntax and rich functions, allowing us to implement partial content more conveniently. refresh.

This article will introduce how to use jQuery to implement partial refresh td, so that your page can respond to user operations more smoothly and quickly.

Create HTML page

First, we need to create an HTML page containing a table to display the data that needs to be updated to the user.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>局部刷新td</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <table>
        <thead>
            <tr>
                <th>ID</th>
                <th>名称</th>
                <th>操作</th>
            </tr>
        </thead>
        <tbody>
            <tr data-id="1">
                <td class="id">1</td>
                <td class="name">Apple</td>
                <td><a href="#" class="update">更新</a></td>
            </tr>
            <tr data-id="2">
                <td class="id">2</td>
                <td class="name">Banana</td>
                <td><a href="#" class="update">更新</a></td>
            </tr>
            <tr data-id="3">
                <td class="id">3</td>
                <td class="name">Cherry</td>
                <td><a href="#" class="update">更新</a></td>
            </tr>
        </tbody>
    </table>
</body>
</html>

In this page, we define a table with three data rows, each row contains an ID and a name, and an "Update" link. The ID information of the data row is saved in the data-id attribute for easy subsequent acquisition.

Write jQuery code

Next, we need to write some jQuery code to achieve partial refresh. Specifically, we need to:

Listen to the click event of the "Update" link;
Get the ID of the data that needs to be updated;
Send an AJAX request to get the latest Data;
Update td content.

$(function() {
    $('a.update').click(function(e) {
        e.preventDefault();
        var row = $(this).closest('tr');
        var id = row.data('id');
        $.ajax({
            url: '/api/data/' + id, // 这里是获取最新数据的API地址，根据需求修改
            dataType: 'json',
            success: function(data) {
                row.find('.name').text(data.name); // 更新名称字段
            }
        });
    });
});

In this code, we first use jQuery's closest function to find the row where the "update" link is located, and then use the data function to get the ID data of the row. Next, we use the ajax function to send a GET request to the API address, expecting to obtain the latest data. When the acquisition is successful, we use the find function to find the name field and use the text function to update the field content.

Write API code

We wrote the jQuery code earlier, but we also need an API to provide the latest data. Below is a simple Node.js Express application example that you can modify to suit your needs.

const express = require('express')
const app = express()

const data = [
    { id: 1, name: 'Apple' },
    { id: 2, name: 'Banana' },
    { id: 3, name: 'Cherry' }
]

app.get('/api/data/:id', (req, res) => {
    const id = req.params.id
    const item = data.find(item => item.id == id)
    res.json(item)
})

app.listen(3000, () => console.log('Server started on port 3000'))

In this API, we only provide a simple GET request handler that accepts an ID parameter, looks up the data from the data array, and returns the result in JSON format. Please note that this API is just an example and you will need to modify it to suit your specific needs.

Run the example

Now, we have finished writing the jQuery code and API code. Next, we need to start the service and access the HTML page.

First, we need to use the command line to enter the project directory, and then start the API service:

node app.js

Then, we open the index.html file in the browser, we can see a file containing three Table of data rows. When we click the "Update" link, the jQuery code will send an AJAX request to the API and update the name field in the table row.

Summary

In this article, we introduced how to use jQuery to implement partial refresh td. Specifically, we created an HTML file containing a table, And wrote some jQuery code to implement the update. In addition, we have written a simple API to provide the latest data.

jQuery is a popular JavaScript library that provides rich functions and syntax to make web development easier. It's a great choice when you need to implement partial refresh. If you haven't used it yet, be sure to give it a try.

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