How to remove the content of tags in jquery-Front-end Q&A-php.cn

How to remove the content of tags in jquery

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Release： 2023-04-26 15:32:14

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When developing web pages, we often need to manipulate the content of elements, control the style of elements or delete elements through JavaScript/JQuery. If you need to delete the content in an HTML tag, we can use the remove() method provided by JQuery.

First, let’s learn about JQuery.

JQuery is a fast and concise JavaScript library that encapsulates commonly used functions such as operating DOM, processing events, animation effects, Ajax, etc., and is widely used in developing interactive front-ends. Using JQuery, we can implement complex functions with concise code.

So, how to use JQuery to remove tag content?

First, we need to introduce the JQuery library into the HTML page. It can be introduced in the following ways:

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

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Next, we can select the elements that need to be operated through the selector provided by JQuery. For example, if we want to delete the content in all paragraph () tags, we can use the following code:

$("p").empty();

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In the above code, $("p") The selector selects all paragraph tags, and the empty() method will delete the content in all paragraph tags.

If you need to remove the content within the specified tag, it is also very simple. For example, we have an HTML page that contains the following content:

<div class="test">
    <h1>这是一级标题</h1>
    <p>这是一个段落，包含一些文本。</p>
</div>

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We want to remove the  in the

tag. Tag content, you can use the following code:

$(".test p").empty();

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In the above code, the selector .test p selects the div with the class name test For all p tags in the tag, the empty() method will remove the contents of these p tags.

In addition to the empty() method, JQuery also provides the remove() method, which can remove the element itself and its child elements. For example, we have the following HTML code:

<div class="test">
    <h1>这是一级标题</h1>
    <p>这是一个段落，包含一些文本。</p>
    <p>这是另外一个段落。</p>
</div>

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If we want to remove the div tag and all the elements inside it, we can use the following code:

$(".test").remove();

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In the above code , the selector .test selects the div tag with the class name test, the remove() method will delete the div tag and all elements inside it.

Summary:

Removing tag content through JQuery is very simple. You only need to select the element and tag to be operated and call empty() or remove() Method is enough. Using JQuery can simplify development and improve efficiency. It is one of the essential tools for front-end development.

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