CSS3 target pseudo-class selector target that you don't know (code example analysis)

Recently, I have been sorting out the knowledge of CSS and found a lot of knowledge blind spots. In the final analysis, I underestimated CSS when I was learning it before, thinking it was too simple, and I should focus on JS. Today I will share a practical CSS3 knowledge, namely css3:target selector. You can also use css3:target to create a tab-like switching effect. I believe many people are not familiar with this attribute. Then read on.

1. How to use CSS3:target selector

target is one of the CSS3 pseudo-class selectors, used to match the target of a certain identifier in the text element. # The name of the anchor is the url in a file that links to the element that is linked to the target element. The :target selector can be used to style the currently active target element.

Specifically, the URL usually contains a #, followed by a name, such as #aa, :target matches the target element with the id "aa". For example: If there is an a tag in a page, its href is as follows: Button 3, there will also be elements with box as the id in the same page,

Then the href attribute of the a tag will be linked to #box, which is the target element selected by the box:target selector. It specifies Style is the style of the target element when a is linked to this element. For example, if you want to change the font size of the element that the link points to #tab, you can set it like this: #tab:target {font-size:30px}.

2. CSS3:target example

is implemented simply with CSS. Click title 1 to jump to content 1. Click title 2 to jump to content 2. Effect.

HTML part:

<p><a href="#news1">标题1</a></p>
  <p><a href="#news2">标题2</a></p>
  <p><a href="#news3">标题3</a></p>    
  <p id="news1"><b>content 1</b></p>
  <p id="news2"><b>content 2</b></p>
  <p id="news3"><b>content 3</b></p>

CSS part:

:target
  {
   border: 2px solid #D4D4D4;
   background-color: #e5eecc;
   font-size:25px;
  }

Picture effect:

##The above effect is similar to tab To switch the effect, you can set the effect you want in the :target pseudo-class. Its usage is actually the same as that of :hover, :link, :visited and other pseudo-classes. In this case, when you click on title 2, content 2 will be activated, the background will be displayed and the font will become larger. Let’s see the effect.

Summary: The element pointed to by the CSS target target id, that is, the element using the (href="#xxx") attribute, must be linked with a, otherwise there will be no Effect. The above mainly introduces an unpopular knowledge of CSS3, and finally uses target to create a tab-like switching effect. I hope it can help you!

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