The weight of pseudo-classes and pseudo-elements
This time I will bring you the weights of pseudo-classes and pseudo-elements. What are the precautions for using the weights of pseudo-classes and pseudo-elements? The following is a practical case, let’s take a look.
<!DOCTYPE html><html lang="en"><head>
<meta charset="UTF-8">
<title>Document</title>
<style>
*{ margin: 0; padding: 0;
} #a .b a{
color: yellow;
} .b a{
color: pink;
} a:hover{
color: red;
} /*
分析：
规则1：伪类(像:hover,:visited,:active,:link)的权重和类选择器是一样的
规则2：伪元素，像before,after优先级和标签选择器是一样的(这一条了解一下，和这道题无关)
#a .b a 的权重为：(0,1,1,1)
.b a的权重为：(0,0,1,1)
a:hover的权重为：(0,0,1,1)
结论：
#a .b a 的权重最高，所以，如果有这个样式的设置，页面上的a链接是黄色的，鼠标hover上去也是黄色的
如果把#a .b a去掉，.b a的权重和a:hover的权重一致，那他们就看谁在最后面，在最后面写的会层叠掉前面的
*/
</style></head><body>
<div class="a" id="a">
<div class="b"><a href="#">我是链接</a></div>
</div></body></html>Detailed explanation of the use of Rxjs
Notification bar script startup tool written in Python
Use flv.js and video.js to create a live video effect
The above is the detailed content of The weight of pseudo-classes and pseudo-elements. For more information, please follow other related articles on the PHP Chinese website!
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
In JavaFX, what are the different path elements?
Aug 28, 2023 pm 12:53 PM
The javafx.scene.shape package provides some classes with which you can draw various 2D shapes, but these are just primitive shapes like lines, circles, polygons and ellipses etc... So if you want to draw complex For custom shapes, you need to use the Path class. Path class Path class You can draw custom paths using this geometric outline that represents a shape. To draw custom paths, JavaFX provides various path elements, all of which are available as classes in the javafx.scene.shape package. LineTo - This class represents the path element line. It helps you draw a straight line from the current coordinates to the specified (new) coordinates. HlineTo - This is the table
CSS transition effect: how to achieve the sliding effect of elements
Nov 21, 2023 pm 01:16 PM
CSS transition effect: How to achieve the sliding effect of elements Introduction: In web design, the dynamic effect of elements can improve the user experience, among which the sliding effect is a common and popular transition effect. Through the transition property of CSS, we can easily achieve the sliding animation effect of elements. This article will introduce how to use CSS transition properties to achieve the sliding effect of elements, and provide specific code examples to help readers better understand and apply. 1. Introduction to CSS transition attribute transition CSS transition attribute tra
C++ program: add an element to an array
Aug 25, 2023 pm 10:29 PM
An array is a linear sequential data structure used to hold homogeneous data in contiguous memory locations. Like other data structures, arrays must have the ability to insert, delete, traverse, and update elements in some efficient way. In C++, our arrays are static. C++ also provides some dynamic array structures. For a static array, Z elements may be stored in the array. So far we have n elements. In this article, we will learn how to insert elements at the end of an array (also known as appending elements) in C++. Understand the concept through examples. The usage of ‘this’ keyword is as follows: GivenarrayA=[10,14,65,85,96,12,35,74,69]Afterin
Use the :nth-child(n+3) pseudo-class selector to select the style of child elements whose position is greater than or equal to 3
Nov 20, 2023 am 11:20 AM
Use the :nth-child(n+3) pseudo-class selector to select the style of child elements whose position is greater than or equal to 3. The specific code example is as follows: HTML code: <divid="container"><divclass="item"> ;First child element</div><divclass="item"&
What elements are not supported by html5
Aug 11, 2023 pm 01:25 PM
Elements that HTML5 does not support are purely expressive elements, frame-based elements, application elements, replaceable elements and old form elements. Detailed introduction: 1. Purely expressive elements, such as font, center, s, u, etc., these elements are usually used to control text style and layout; 2. Frame-based elements, such as frame, frameset and noframes, these elements are used in In the past, it was used to create web page layouts and split windows; 3. Application-related elements, such as applet, isinde, etc.
Use the :active pseudo-class selector to implement CSS styles for mouse click effects
Nov 20, 2023 am 09:26 AM
CSS styles using the :active pseudo-class selector to achieve mouse click effects CSS is a cascading style sheet language used to describe the performance and style of web pages. :active is a pseudo-class selector in CSS, used to select the state of an element when the mouse is clicked. By using the :active pseudo-class selector, we can add specific styles to the clicked element to achieve the mouse click effect. The following is a simple sample code that demonstrates how to use the :active pseudo-class selector to achieve a mouse click effect.
CSS transformation: how to achieve the rotation effect of elements
Nov 21, 2023 pm 06:36 PM
CSS transformation: How to achieve the rotation effect of elements requires specific code examples. In web design, animation effects are one of the important ways to improve user experience and attract user attention, and rotation animation is one of the more classic ones. In CSS, you can use the "transform" attribute to achieve various deformation effects of elements, including rotation. This article will introduce in detail how to use CSS "transform" to achieve the rotation effect of elements, and provide specific code examples. 1. How to use CSS’s “transf
How to use CSS to achieve an element's transparency gradient effect
Nov 21, 2023 pm 01:38 PM
How to use CSS to achieve the transparency gradient effect of elements In web development, adding transition effects to web page elements is one of the important means to improve user experience. The gradient effect of transparency can not only make the page smoother, but also highlight the key content of the element. This article will introduce how to use CSS to achieve the transparency gradient effect of elements and provide specific code examples. Using the CSS transition attribute To achieve the transparency gradient effect of an element, we need to use the CSS transition attribute. t
