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jquery element size change event

WBOYOriginal: 2023-05-24 20:47:35789browse

With the development of Internet technology, page effects have attracted more and more attention from users. In a Web page, the size change of elements is a scene that occurs frequently. For example, when we need to dynamically change the size of an element, the page should respond. In this case, the JQuery element size change event becomes a technology we need to master.

In this article, we will learn how to use JQuery element size change event.

1. What is the JQuery element size change event?

The JQuery element size change event, also called the resize event, is an event type in JQuery that can change the size of the element. is triggered. Can be used to detect changes in element size and handle them accordingly.

2. How to use the JQuery element size change event

The following is the basic syntax for using the JQuery element size change event:

$(selector).resize(function(){
  //code to be executed on resize event
});

Among them, the selector can be to specify a specific The element can also be a certain class or tag, or even the entire document can be specified.

In addition, in actual applications, we may encounter the problem of continuous triggering of element size change events. In this case, we can use the debounce method to solve the problem. The following is the use of debounceBasic syntax of the method:

$(window).on('resize', $.debounce(250, function(){
  //code to be executed on resize event
}));

3. Example of JQuery element size change event

The following is a simple JQuery element size change event example, let us explain it step by step:

<!DOCTYPE html>
<html>
<head>
  <title>JQuery元素大小改变事件示例</title>
  <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
  <style>
    div{
      height: 100px;
      width: 100px;
      background-color: coral;
      margin: 10px;
      float: left;
    }
  </style>
</head>
<body>
  <h1>JQuery元素大小改变事件示例</h1>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <script>
    $(document).ready(function(){
      $("div").resize(function(){
        alert("元素大小改变！");
      });
    });
  </script>
</body>
</html>

In the above code, we first define 4 div elements of the same size and define their styles using CSS. Then after the page is loaded, we use JQuery to select all divs and bind the resize event to them. When the size of any of the divs changes, a prompt box "Element size changed!" will pop up.

4. Summary

In this article, we have learned about the basic concepts and usage of JQuery element size change events, and used an example to help you further understand. As JQuery is more and more widely used in front-end development, mastering this skill will play a considerable role in actual work. While improving the page interaction experience, it will also add points to our own technical level.

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