Learn attribute selectors in jQuery: examples and usage analysis
Learn the attribute selector in jQuery: examples and usage analysis
In front-end development, jQuery is a widely used JavaScript library that can simplify page operations, Code writing for event handling, animation effects, etc. Among them, the attribute selector is an important method in jQuery, which can filter and operate based on the attribute value of the element. This article will introduce the examples and usage of attribute selectors in jQuery, and provide specific code examples.
1. Basic syntax
The attribute selector uses the syntax [attribute=value] in jQuery, where attribute is the attribute name of the element , value is the attribute value to be matched. In addition, different matching methods can be achieved through different operators, including "equal to", "not equal to", "contains", etc.
2. Example and usage analysis
2.1 Simple attribute selector
<!DOCTYPE html>
<html>
<head>
<title>属性选择器实例</title>
<!-- 引入jQuery库 -->
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<p class="example" id="demo" title="example">这是一个示例段落</p>
<script>
$(document).ready(function(){
// 通过属性选择器选取title属性为example的元素
$('[title="example"]').css('color', 'red');
});
</script>
</body>
</html>In the above example, through the attribute selector[title="example" ]Select the element whose title attribute is example, and then change its text color to red.
2.2 Not equal to selector
<!DOCTYPE html>
<html>
<head>
<title>属性选择器实例</title>
<!-- 引入jQuery库 -->
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<p class="example" id="demo" title="example">这是一个示例段落</p>
<p class="example" id="demo2" title="another">这是另一个示例段落</p>
<script>
$(document).ready(function(){
// 通过属性选择器选取title属性不等于example的元素
$('[title!="example"]').css('color', 'blue');
});
</script>
</body>
</html>In the above case, select the element whose title attribute is not equal to example, and set its text color to blue.
2.3 Containing selector
<!DOCTYPE html>
<html>
<head>
<title>属性选择器实例</title>
<!-- 引入jQuery库 -->
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<p class="example" id="demo" title="example">这是一个示例段落</p>
<p class="example" id="demo2" title="another example">这是另一个示例段落</p>
<script>
$(document).ready(function(){
// 通过属性选择器选取title属性值包含example的元素
$('[title*="example"]').css('font-weight', 'bold');
});
</script>
</body>
</html>In this case, the element containing example in the title attribute value is selected by including the selector [title*="example"] And set its text to bold.
Conclusion
Through the examples and usage analysis in this article, we understand the basic syntax and common usage of attribute selectors in jQuery. Attribute selectors can help us select elements on the page more accurately and achieve more flexible interaction effects. I hope that readers can become more proficient in using the attribute selector in jQuery and improve the efficiency of front-end development by studying this article.
The above is the detailed content of Learn attribute selectors in jQuery: examples and usage analysis. For more information, please follow other related articles on the PHP Chinese website!
C and JavaScript: The Connection ExplainedApr 23, 2025 am 12:07 AMC and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.
From Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AMJavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.
Python vs. JavaScript: Use Cases and Applications ComparedApr 21, 2025 am 12:01 AMPython is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.
The Role of C/C in JavaScript Interpreters and CompilersApr 20, 2025 am 12:01 AMC and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.
JavaScript in Action: Real-World Examples and ProjectsApr 19, 2025 am 12:13 AMJavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.
JavaScript and the Web: Core Functionality and Use CasesApr 18, 2025 am 12:19 AMThe main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.
Understanding the JavaScript Engine: Implementation DetailsApr 17, 2025 am 12:05 AMUnderstanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.
Python vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AMPython is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Atom editor mac version download
The most popular open source editor
Dreamweaver Mac version
Visual web development tools
PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
