css selectors

{} represents the AA class selector under P label nbsp;p>aa{} indicates that the child P.AA under the P tag have both P and AA labels pseudo-Class selectors: The class has a state, can be accessed by multiple elements, a hyperlink has 4 states, and other tokens can only support hover li>:link Normal link when : visited has clicked the status of the access completed : hover When the mouse is moved : active wh

What is a CSS selector? The CSS selector is the tag that specifies the CSS to function, and the name of the tag is the selector. means: Select which container. Elements in an HTML page are controlled by a CSS selector. So, what are the CSS

Css one. Selector modePattern/meaning/content description * matches any element. (Universal selector) E Matches any element e (for example, an element of type E). (type selector) E F Matches any descendant element F of element E. (descendant selector) E > F Matches any child element F of element E. (sub selector) E:first-child When Element e is the first child element in its parent element, the match element E. (: First-child pseudo Class) E:link e:v

of the selector where the pseudo-element appears. It would be illegal to write P:before em.P:before{content: "Text"}4: After the content is inserted after the element contentBy default, this pseudo-element is an inline element that inherits the attributes of an elementP:after{content: "Text"}9. Property SelectorThe property selector selects elements based on their attributes and attribute values1. Simple attribute Selectora[href][title]{color:red;} #div [Class]{color:red;}. box[id]{color:red;}i

The selector is the tag that specifies the CSS to function, and the name of the tag is the selector. Select which container (the label itself is the container that encapsulates the data). @CHARSET "UTF-8"; There are many kinds of selectors in/*css, the first is the most basic element selector (aka Type selector). * The element of the docum

fixed or scrolled along with the scroll barBackground-position:x,y, percent can be used, where the number is used, the percentage can be used, if the percentage does not work, then see if the ancestor element does not have a percentage of the settingFont:Fony-style: Font style, such as italicFont-variant:small-caps for the English alphabetFont-weight: Bold or notFont-size: SizeFont-height: Text line heightFont-family: Fonts such as "Song Body"list Item liList-style-type:square (square) List bul

Three CSS selectors: ID selector #test1{}, class selector. test2{}, Tag Selector div{} to three div:The ID selector, class selector, tag Selector, derived selector div p{}div p, derived classes (depending on the hierarchy between the elements);CSS Precedence: Multiple selectors control an element at the same time, and

CSS OverviewIn order to make the style of the Web page more rich, but also in order to let the content and style of the page can be split apart, CSS is born from this idea, CSS is cascading style Sheets acronym, meaning cascading style sheet. With most of the css,html in the style of the label is discarded, HTML is onl

CSS selectors are available in the same way. Here are a few common and their features1. Element Selectorsuch as H1 H2 H3 a p, such as a series of standard signature2 Pass Selector*, match all elements of HTMLClass 3 SelectorClass= ' A B ' this selector is the same in. a.b and. B.A, with no difference in order, and the class selector is case-sensitive, class= ' a ' is not available in

In css, the class selector adds a dot before the class name. If a class is not followed by multiple dots. important. urgent. Next I will introduce the usage of CSS class selectors and multi-class selectors. In CSS, the class selector is displayed with a dot: The Code is as

1. Full name of CSS2. CSS stacking order: Priority from low to high• Browser settings• External style sheet• Internal style sheet• Inline style3.3 Forms of CSS, and syntax format for each form--Notice why the style sheet is commonly used link4. CSS basic Syntax: selector (property:value; color:red; declaration3; ...)Related nouns:

What does this article bring to you about CSS selectors? CSS Selector Use summary, there is a certain reference value, the need for friends can refer to, I hope to help you. 1. Selector (device) using basic syntaxSelector {Attribute 1: Property value 1;Attribute 2: Attribute value 2;Attribute 3: Attribute value 3;.....: .......;}2. Tag Selector (directly using HT

It took a few pages to highlight the use of CSS selectors, which I divided into three parts: theCSS3 basic selector, theCSS3 property selector, and the CSS3 pseudo-class selector. So today I would like to work with you to learn about the performance optimization of the--CSS selector. Because the performance of this piece has been very weak, so today start with th

When I first started to write CSS, the high degree of freedom in its code always puzzled me. This means that the same design, if you let different people to implement, the final code must be different. But there is a problem, if different people through different methods and code style, from the appearance of the same design, it will be difficult to judge who did better. Want to also, since all realized the design, has achieved the goal, the

CSS journey-how to better understand various selectors on the second site, css journey-deep Selector In the previous article, we talked about why css should be used. In this article, we will start with the selector. We all know that the browser will parse the html from the far end into the dom model. With the dom model

Css One. Selector modePattern/meaning/content description *matches any element. (Universal selector)EMatches any element e (for example, an element of type E). (type selector)E FMatches any descendant element F of element E. (descendant selector)E > FMatches any child element F of element E. (sub selector)E:first-childWhen Element e is the first child element in its parent element, the match element E. (: First-child pseudo Class)E:link e:visitedMatch

All HTML elements are selectors (all HTML elements are HTML) The previous course defines the elements of For example, set the background color for the entire body below Body { background-color: #C6E2FF; } Multiple selectors (multiple selectors) You can nest an HTML element inside another, for example, In this case, how does

"smart" selectors, we show you how to query the existing functional features of semantically formatted HTML documents as a reward for well-formed markup. If your code is correct, you will certainly get what you expect to design. I think that if you are developing several different projects at the same time as me, I hope that these methods will simplify your workflow and make it easier to travel through these projects. In addition, in the f

BeautifulSoup supports the most commonly used CSS selectors, which is the. Select () method that converts a string into a tag object or BeautifulSoup itself.The HTML used in this article is:Html_doc = "" "html>head>title>The Dormouse ' s storytitle>head>body>p class="title">b>The Dormouse ' s storyb>P>p class="story">Once upon a time there were three Little sisters; and their names werea href="Http://exampl

Css style sheets have four attribute selectors: css style sheets Four attribute selectors in the css style sheet1> simple attributes Tag [class] {font-weight: bold} It will affect all tag with any class. e.g. 2> precise attribute values A [href = "http://www.cnblogs.cn"