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This article mainly shows you "what are the differences between id and class in html", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what are the differences between id and class in html".

Differences: 1, the scope of class is larger than id, id is unique, can only be called once in a page, and class can be called multiple times; 2, id corresponding to css style selector is "#", and class corresponding to css style selector is "."; 3, the priority of id selector is higher than class selector.

The operating environment of this tutorial: windows7 system, CSS3&&HTML5 version, Dell G3 computer.

Comparison of class and id in Html:

1. The scope of action is different:

The scope of class is larger than that of id, and id means that it is uniquely identified, just like our personal ID cards, that can only be called once in a page. Generally speaking, a web page does not set up two or more id. The scope of class is more extensive. Class is a class tag that can be called multiple times in an interface. Can be reused.

2. The syntax used is different:

How id selectors are used in css, such as using div as an example: (for example, there are div id='i' … And div class='c'... Two div boxes, referenced in css as follows:)

.c {attribute: attribute value;} # I {attribute: attribute value;}

3. The priority is different:

The priority of the id selector is higher than that of the class selector. Id selectors can be used for the more important ones.

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