What are the common tag selectors?
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There are three common tag selectors: "element selector", "class selector" and "ID selector": 1. Element selector, select according to the type of HTML element, the syntax is "p {color: red;}"; 2. Class selector, select based on the class attribute of the element, the syntax is ".myClass {color: blue;}"; 3. ID selector, select based on the ID of the element, the syntax is "#myID {font-size: 20px;}".
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
Common tag selectors include the following:
- Element selector: It selects based on the type of HTML element, such as p, div, span, etc. For example, p {color: red;} will set the text color of all
elements to red.
- Class selector: It selects based on the class attribute of the element. The syntax for a class selector is to precede the class name with a dot (.). For example, .myClass {color: blue;} will set the text color of all elements with class myClass to blue.
- ID selector: It selects based on the ID of the element. The syntax of the ID selector is to precede the ID with a pound sign (#). For example, #myID {font-size: 20px;} will set the font size of the element with ID myID to 20 pixels.
The following is an example description:
<!DOCTYPE html>
<html>
<head>
<style>
p {
color: red;
}
.myClass {
color: blue;
}
#myID {
font-size: 20px;
}
</style>
</head>
<body>
<p>这是一个段落。</p>
<div class="myClass">这是一个带有类名的div元素。</div>
<span id="myID">这是一个带有ID的span元素。</span>
</body>
</html>
In this example, all paragraph text is red because the element selector is used. The text of the div element with the class name "myClass" is blue because the class selector is used. The font size of the span element with the ID "myID" is 20 pixels because of the ID selector used.
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