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How to select tags in css

WBOYOriginal: 2021-12-03 16:34:566153browse

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 >我是标题</h1>
    <p >我是段落</p>
    <a href="#">我是超链接</a>
</body>
</html>

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