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This article mainly explains "what is the difference between CSS class and ID selector". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the difference between CSS class and ID selector".

Similarities: can be applied to any element

Differences:

1. The ID selector can only be used once in the document. Unlike the class selector, the ID selector can only be used once and only once in an HTML document. The class selector can be used multiple times.

The following code is correct:

When I was in the third grade, I was a timid little girl. I never dared to answer the teacher's questions in class for fear that the teacher would criticize me if I gave the wrong answer. I never had the courage to answer the teacher's questions.

And the following code is wrong:

When I was in the third grade, I was a timid little girl. I never dared to answer the teacher's questions in class for fear that the teacher would criticize me if I gave the wrong answer. I never had the courage to answer the teacher's questions.

2. You can use the class selector word list method to set multiple styles for an element at the same time. We can set multiple styles for an element at the same time, but only with the method of class selector, ID selector is not allowed (you can't use ID word list).

The following code is correct (for the complete code, see the code editor on the right)

.stress {

Color:red

}

.bigsize {

Font-size:25px

}

In the second semester of the third grade, our class had an open class.

The function of the above code is to set the text color to red and the font size to 25px for the "third grade" text.

The following code is incorrect (for the complete code, see the code editor on the right)

# stressid {

Color:red

}

# bigsizeid {

Font-size:25px

}

In the second semester of the third grade, our class had an open class.

The above code cannot achieve the function of setting the text color to red and the font size to 25px for the "third grade" text.

Thank you for reading, the above is the content of "what is the difference between CSS class and ID selector". After the study of this article, I believe you have a deeper understanding of what is the difference between CSS class and ID selector. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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