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This article mainly shows you "what are the specifications of the code 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 specifications of code in HTML" this article.

HTML tags are not case sensitive and lowercase is recommended. Such as:,

HTML tag attributes are optional. Some tags have no attributes, such as:,

The content of the double tag is between the start and end tags, and the single tag has no content.

HTML tags can be nested with each other, but be careful to nest sequentially, with outer layer and inner layer, one layer at a time.

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