Css method to select tags: 1. Use the id selector, the syntax is "#id name {css code;}"; 2. Use the class selector, the syntax is ".class name {css code;}" "; 3. Use the tag selector, the syntax is "tag name {css code;}"; 4. Use the wildcard selector, the syntax is "*{css code;}".
The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.
How to select tags in css
There are four ways to select tags in css, which are also 4 selectors.
1. ID selector
According to the specified id name, find the corresponding only label in the current interface, and then set the attribute
#id名称 {
属性：值;
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>id选择器</title>
<style>
#p1 {
color: red;
}
#p2 {
color: green;
}
#p3 {
color: blue;
}
</style>
</head>
<body>
<p id="p1">大多数人的帅，都是浮在表面的，是外表的帅</p>
<p id="p2">而EGON，不仅具备外表帅，内心更是帅了一逼</p>
<p id="p3">EGON就是我，我就是EGON</p>
</body>
</html>2. class, class selector
According to the specified class name, find the corresponding label in the current interface, and then set the attribute
.类名称 {
属性：值;
}Example
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>id选择器</title>
<style>
.p1 {
color: red;
}
.p2 {
color: green;
}
.p3 {
color: blue;
}
</style>
</head>
<body>
<p class="p1">大多数人的帅，都是浮在表面的，是外表的帅</p>
<p class="p2">而EGON，不仅具备外表帅，内心更是帅了一逼</p>
<p class="p3">EGON就是我，我就是EGON</p>
</body>
</html>
#练习
第一行与第三行的颜色都是红色
第一行与第二行的字体大小都是50px
第二行与第三行内容有个下划线
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>id选择器</title>
<style>
.p1 {
color: red;
}
.p2 {
font-size: 50px;
}
.p3 {
text-decoration: underline;
}
</style>
</head>
<body>
<p class="p1 p2">第一行内容</p>
<p class="p2 p3">第二行内容</p>
<p class="p1 p3">第三行内容</p>
</body>
</html> 3. Tag selector
According to the specified tag name, find all tags with this name in the current interface, and then set the attributes
标签名称 {
属性：值;
}The example is as follows:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>标签选择器</title>
<style type="text/css">
p {
color: red;
}
</style>
</head>
<body>
<p>EGON美丽的外表下其实隐藏着一颗骚动的心</p>
<ul>
<li>
<ul>
<li>
<ul>
<li>
<p>这颗心叫做七巧玲珑心，男人吃了会流泪，女人吃了会怀孕</p>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</body>
</html>4. Wildcard selector
Select all tags
* {
属性：值；
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>通配符选择器</title>
<style type="text/css">
* {
color: red;
}
</style>
</head>
<body>
<h1 id="我是标题">我是标题</h1>
<p >我是段落</p>
<a href="#">我是超链接</a>
</body>
</html>(Learning video sharing: css video tutorial)
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