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How to use jquery in html

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Release： 2023-04-26 10:49:38

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How to use jQuery in HTML

jQuery is a popular JavaScript library that simplifies the task of developers as it provides an easy-to-use API that helps you write efficient JavaScript code quickly. This article explains how to use jQuery with HTML.

Introducing jQuery into HTML

You need to introduce the jQuery library into HTML before it can be used elsewhere. Typically, you would add the following code in the head of your HTML:

<head>
    <!-- 引入 jQuery 库 -->
    <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
</head>

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The code above assumes you are using a public jQuery CDN, if you are using a local jQuery file, replace the path with your local file path.

Using jQuery

After you reference jQuery, you can use the methods and functions it contains. Here are some of the most commonly used jQuery methods:

Element Selectors

jQuery uses the same element selectors as CSS, so you can easily select elements in your HTML document. For example, to select all p elements, use the following code:

$("p")

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To select the element with id myDiv, use the following code:

$("#myDiv")

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To select all elements with class myClass, Use the following code:

$(".myClass")

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Event Handling

jQuery allows you to easily bind event listeners on HTML elements. For example, to run code when a button is clicked, use the following code:

$("button").click(function() {
  // 这里是代码逻辑
});

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This code will find all the buttons on the page and run the specified code logic when the button is clicked.

DOM operations

jQuery provides many practical DOM manipulation functions. For example, to add an element to the page, use the following code:

$("body").append("<p>Hello World!</p>");

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This code will add a new p element to the page and add the text "Hello World!" to it.

Other commonly used DOM operations include:

Remove elements: $("p").remove();
Hide elements : $("p").hide();
Change element content: $("p").text("new text");

Ajax

jQuery provides methods to simplify Ajax calls. To run an Ajax request using jQuery, use the following code:

$.ajax({
  url: "myurl",
  success: function(result) {
    // 这里是返回数据的逻辑
  }
});

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This code will send an Ajax request to the specified URL and run the specified code logic on success.

Conclusion

In this article, we introduced how to use common jQuery methods in HTML. If you're just getting started with jQuery, these methods should be enough to get you started writing simple code. We also recommend that you check out the jQuery API documentation to learn more about the available methods and functionality.

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