How to use Layui to implement draggable page element sorting function

How to use Layui to implement draggable page element sorting function

Foreword:
In Web development, the sorting function of page elements is a common requirement . Using Layui as the front-end framework, you can easily implement drag-and-drop sorting of page elements. This article will introduce how to use Layui to implement this function and provide specific code examples.

1. Project preparation

1. Download Layui and configure it into the project. Layui download address: https://www.layui.com/
2. Create an HTML file and introduce Layui related files.

2. Implement draggable page element sorting function

1. HTML structure
   In HTML, we need to add A unique identifier and adds an id to each page element container.

<div id="container">
  <div class="item" id="item1">元素1</div>
  <div class="item" id="item2">元素2</div>
  <div class="item" id="item3">元素3</div>
  <div class="item" id="item4">元素4</div>
</div>

2. CSS Style
   In order to implement the drag and drop function, we need to add some CSS styles.

.item {
  width: 100px;
  height: 100px;
  background-color: #ccc;
  margin-bottom: 10px;
  cursor: move;
}

3. JavaScript code
   Using Layui’s element sorting API, you can easily implement the draggable page element sorting function.

layui.use(['element', 'jquery'], function(){
  var element = layui.element;
  var $ = layui.jquery;

  // 初始化排序
  element.sort('container', function(elem){
    return elem.clone();
  });

  // 监听元素位置更新
  element.on('elemSort(container)', function(elem){
    // 获取排序后的元素顺序
    var sortIds = [];
    $('#container .item').each(function(){
      sortIds.push($(this).attr('id'));
    });

    console.log(sortIds);
    // 在这里可以执行自己的业务逻辑，比如提交排序结果到后台
  });
});

Explanation:

• Initialization sorting: Initialize the sorting of the container by calling the element.sort() function. At this time, each page element The position will be fixed.
• Listen to element position updates: You can obtain element position update information by listening to the elemSort event. In this event handler, we can get the sorted element order and perform our own business logic.

3. Effect Demonstration
Open the browser and load the HTML file. You can now try to drag the page elements to sort them. When you drag page elements to a new location, the console will print out the sorted order of the elements.

Note:

• The page element container must have an id attribute.
• Page elements must have a unique identifier added.

Conclusion:
Through the above steps, we successfully used Layui to implement the draggable page element sorting function. I hope this article is helpful to you, if you have any questions please feel free to contact me. thanks for reading!

Reference materials:

• Layui documentation: https://www.layui.com/doc/

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