Dom is the abbreviation of Document Object Model, which means document object model. DOM is an interface that is independent of browsers, platforms, and languages. You can use this interface to easily access all standard components in the page.
DOM operations can be divided into three aspects: DOM Core, HTM-DOM and CSS-DOM.
jQuery DOM element methods
Function | Description |
---|---|
.get() | Get the DOM element specified by the selector. |
.index() | Returns the index position of the specified element relative to other specified elements. |
.size() | Returns the number of elements matched by the jQuery selector. |
.toArray() | Returns the elements matched by the jQuery selector as an array. |
1.attr() .removeAttr()
The.attr() method can pass in a parameter of a name-value pair, or an object parameter containing more than two name-value pairs, for example:
.attr('src','images/a.jpg');
.attr({ rel:'www', id:'zz', title:'some', some:'111' });
Of course, you can also remove one or more attributes.removeAttr('id rel');
2.prop()
This method can get the attribute value
Pass in the attribute name (string) of the value you want to get, such as .prop('id');
Set the value of id (modify the attributes that exist in the DOM itself such as the href and id of the a tag)
.prop('id','otherid');
3.val()
This method is often used to obtain the value of form controls
4.insertBefore() .insertAfter() .prependTo() .appendTo()
.insertBefore() adds content outside and before existing elements; (reverse operation .before())
.insertAfter() adds content outside and after the existing element; (reverse operation .after())
.prependTo() adds content inside and before existing elements; (reverse operation .prepend())
.appendTo() adds content inside and after the existing element; (reverse operation .append())
5.clone()
This method can copy the copy element. If you need the copied element to inherit other events, you need to pass in a Boolean value as a parameter, .clone(true)
6.wrap() .wrapAll() .wrapInner()
.wrap() and .wrapInner() can be understood as relative. .wrap() is wrapped one layer outside the element, while .wrapWith() is wrapped one layer inside the element,
And .wrapAll() wraps all matched elements
7.html() .text() .replaceWith() .replaceAll()
.html() can pass in text or DOM nodes;
.text() can only read or replace text;
.replaceWith(). . . Replace "into". . . ;
.replaceAll(). . . Replace "give". . .
8.empty()
Remove element
9.detach() .remove()
These two methods are somewhat similar, neither will delete the matching elements from the jQuery object, but there are still differences:
.detach() All bound events, additional data, etc. will be retained
.remove() In addition to the element itself being retained, other elements such as
Bound events, attached data, etc. will be removed.

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.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

Python is more suitable for data science and machine learning, while JavaScript is more suitable for front-end and full-stack development. 1. Python is known for its concise syntax and rich library ecosystem, and is suitable for data analysis and web development. 2. JavaScript is the core of front-end development. Node.js supports server-side programming and is suitable for full-stack development.

JavaScript does not require installation because it is already built into modern browsers. You just need a text editor and a browser to get started. 1) In the browser environment, run it by embedding the HTML file through tags. 2) In the Node.js environment, after downloading and installing Node.js, run the JavaScript file through the command line.


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),

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Notepad++7.3.1
Easy-to-use and free code editor

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.