search
HomeCommon ProblemWhat selectors does xml have?

xml has three most basic selectors: "element selector", "class selector" and "ID selector": 1. Element selector, the most basic selector, matches elements by element name ; 2. Class selector, matching elements by class name, the format is to add a dot "." before the class name; 3. ID selector, matching elements by ID, the format is adding a pound sign "#" before the ID .

What selectors does xml have?

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

There are the following selectors in XML:

  1. Element selector: This is the most basic selector, matching elements by element name. For example, is an element selector that selects the element named "productame".
  2. Class selector: Match elements by class name. The format of a class selector is to precede the class name with a dot (.). For example, .className is a class selector that selects elements with the class name "className".
  3. ID selector: matches elements by ID. The format of the ID selector is to add a pound sign (#) before the ID. For example, #IDName is an ID selector that selects elements with the ID "IDName".

In addition to the above three basic selectors, there are other more complex selectors:

  1. Descendant selectors: You can select the child elements of a specific element. For example, div p will select all p elements inside a div element.
  2. Child element selector: You can select the direct child elements of a specific element. For example, div > p will select all p elements that are direct children of div elements.
  3. Adjacent sibling selector: You can select the next or previous sibling element of a specific element. For example, h1 p will select all p elements immediately following the h1 element.
  4. Attribute selector: You can select elements with specific attributes. For example, input[type="text"] will select all input elements of type "text".

Here is an example showing how to use these selectors:

<root>  
  <productame>This is a product</productame>  
  <price>100</price>  
  <productame>Another product</productame>  
</root>

In this example, these elements can be styled using the following CSS rules:

/* 使用元素选择器 */  
productame {  
  font-size: 20pt;  
}  
  
/* 使用类选择器 */  
.red {  
  color: red;  
}  
  
.blue {  
  color: blue;  
}  
  
/* 使用ID选择器 */  
#price {  
  color: green;  
}

In this CSS, the productame selector sets all elements to a font size of 20 points. The .red and .blue class selectors set elements with the corresponding class name to red or blue. The #price ID selector sets the element to green.

The above is the detailed content of What selectors does xml have?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

mPDF

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

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

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SecLists

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.