jquery front desk deletion

jQuery is a JavaScript library widely used in front-end web development. By using it to enhance interactivity, the entire user experience is deeper and more effective.

This article focuses on jQuery front-end deletion. Deletion is an inevitable part of the front-end development process. For data addition, deletion, modification and query operations, data interaction with the backend is generally required. However, using jQuery front-end deletion can eliminate the need for data interaction with the back-end, thus simplifying the page operation process.

Foreground deletion is divided into two situations: deleting static data and deleting dynamic data. They will be introduced separately below.

1. Delete static data

The so-called static data refers to data that already exists when the page is loaded, such as HTML text or pictures, etc. Deleting static data can be achieved through the remove() method in jQuery, which can remove specified elements.

For example, we create a list with a delete button in each row. Click the Delete button to delete the entire list item. The HTML code is as follows:

<ul>
  <li>列表项1 <button class="remove">删除</button></li>
  <li>列表项2 <button class="remove">删除</button></li>
  <li>列表项3 <button class="remove">删除</button></li>
  <li>列表项4 <button class="remove">删除</button></li>
</ul>

Next, we need to use the jQuery selector to find the element to be deleted and bind a click event to the delete button.

$(document).ready(function(){
  $('.remove').click(function(){
    $(this).parent().remove();
  });
});

In the above code, $(document).ready() indicates that the page has been loaded, and $(‘.remove’) indicates that all delete buttons are found by selecting the class name of the button. Then get the list item where the button is located by calling the parent() method, and then use the remove() method to remove the list item.

2. Delete dynamic data

Dynamic data refers to the data obtained through JavaScript and back-end data interaction on the page. When deleting dynamic data, we need to send a request to the server through AJAX to tell the server which data to delete, and after the deletion is successful, update the display of the data on the page.

The HTML structure is as follows:

<div class="list-container">
  <ul id="data-list">
    <li>动态数据1 <button class="remove" data-id="1">删除</button></li>
    <li>动态数据2 <button class="remove" data-id="2">删除</button></li>
    <li>动态数据3 <button class="remove" data-id="3">删除</button></li>
    <li>动态数据4 <button class="remove" data-id="4">删除</button></li>
  </ul>
</div>

In the above HTML code, we set the data-id to represent the id value of each row of data to facilitate identification when deleting.

Below, we use jQuery to send an AJAX request to the server, delete the specified data, and refresh the page.

$(document).ready(function(){
  $('.remove').click(function(){
    var id = $(this).data('id');
    $.ajax({
      type: 'POST',
      url: '/delete.php',
      data: {id: id},
      success: function(data){
        if (data.success) {
          $('#data-list li[data-id="'+id+'"]').remove();
        }
      }
    });
  });
});

In the above code, $(this).data('id') means to obtain the data-id value of the current button; the $.ajax() method means to send an AJAX request, and in the deletion success callback function Use the jQuery selector to select the element you want to delete and delete it.

Summary

This article introduces jQuery front-end deletion, which allows us to save data interaction with the back-end through front-end operations. Deleting static data can be achieved through the remove() method, while deleting dynamic data requires sending a request to the server through AJAX and refreshing the page. By using jQuery front-end deletion, the entire operation process can be made simpler, faster and smoother, providing users with a better experience.

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