How to determine if there are child elements in jquery

The method for jquery to determine whether there are child elements is: 1. Create an html sample file; 2. Import the jQuery file; 3. Create a div paragraph containing the p tag and set the id to parent; 4. Use " children()" method, determine whether "$('#parent')" has a return value, and output the result based on the return value.

The operating system of this tutorial: Windows 10 system, jQuery3.6.0 version, Dell G3 computer.

To determine whether an element has child elements in jQuery, you can use the `children()` method. This method returns all direct child elements of the specified element, or an empty collection if there are no child elements.

The following is a sample code that demonstrates how to use the `children()` method to check whether an element has child elements:

```html
<div id="parent">
  <p>这是一个段落。</p>
</div>
```
```js
// 判断 #parent 元素是否有子元素
if ($(&#39;#parent&#39;).children().length > 0) {
  console.log(&#39;这个父元素有子元素。&#39;);
} else {
  console.log(&#39;这个父元素没有子元素。&#39;);
}
```

The above example will output " This parent element has child elements." Because the `#parent` element contains a child element `

`.

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