Detailed explanation of how to add elements to divs using jQuery
Detailed explanation of how to add elements in divs using jQuery
jQuery is a very powerful JavaScript library that provides many concise and powerful methods to manipulate the DOM element. In web development, it often involves the need to dynamically add elements to the page. In this article, we will introduce in detail the methods of adding elements in divs using jQuery, and provide specific code examples to help readers better understand and apply these methods.
- Use the append() method to add elements
The append() method in jQuery is used to insert specified content at the end of the matching element. You can select the target div to be operated on through the selector, and then use the append() method to add elements. The following is a simple example:
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script> $(document).ready(function(){ $("#targetDiv").append("<p>新添加的段落</p>"); }); </script> <div id="targetDiv"> <!-- 这里是目标div --> </div>
In the above code, the jQuery library is first introduced, and then the append() method is used in the document ready event to add a new div with the id of targetDiv. Paragraph element.
- Use the appendTo() method to add elements
In addition to appending content after the target element, you can also use the appendTo() method in jQuery to add content to the end of the specified element. Here is an example:
<script> $(document).ready(function(){ $("<p>新添加的段落</p>").appendTo("#targetDiv"); }); </script>
In the above code, by creating a new paragraph element and adding it to the div with the id of targetDiv.
- Add elements using prepend() method and prependTo() method
Similar to append() method and appendTo() method, jQuery also provides prepend() method and prependTo() method, Used to add content at the beginning of the target element. The sample code is as follows:
<script> $(document).ready(function(){ $("#targetDiv").prepend("<p>新添加的段落</p>"); }); </script>
<script> $(document).ready(function(){ $("<p>新添加的段落</p>").prependTo("#targetDiv"); }); </script>
The above two pieces of code implement the use of prepend() method and prependTo() method respectively to add a new paragraph element in the div with the id of targetDiv.
- Add elements using the before() method and after() method
In addition to adding elements inside the target element, you can also use the before() method and after() method in jQuery to add elements to the target element. Add external elements. The sample code is as follows:
<script> $(document).ready(function(){ $("#targetDiv").before("<p>在目标div之前添加</p>"); $("#targetDiv").after("<p>在目标div之后添加</p>"); }); </script>
The above code adds a new paragraph element before and after the target div through the before() method and after() method.
Summary: In web development, dynamically adding elements is a very common requirement, and jQuery provides a wealth of methods to achieve this function. Through methods such as append(), appendTo(), prepend(), prependTo(), before(), and after(), you can easily operate DOM elements and add interactivity and dynamics to the page. We hope that through the introduction and sample code of this article, readers can become more proficient in using these methods to achieve the results they want.
The above is the detailed content of Detailed explanation of how to add elements to divs using jQuery. For more information, please follow other related articles on the PHP Chinese website!

JavaScript'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.

The 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 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 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.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

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),

SublimeText3 English version
Recommended: Win version, supports code prompts!

SublimeText3 Chinese version
Chinese version, very easy to use

Dreamweaver Mac version
Visual web development tools

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft