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This article mainly introduces the detailed explanation of the elements and basic grammar of Html5. In the daily operation, I believe that many people have doubts about the elements and basic grammar of Html5. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about the elements and basic grammar of Html5. Next, please follow the editor to study!

HTML tag

Opening tag (opening tag): open tag

Closing tag (closing tag): closing label

element

Definition: the HTML element refers to the code from the start tag to the end tag (the element starts with the start tag and ends with the accommodation tag)

The content of an element: the content of an element refers to the content between the start tag and the end tag

The characteristics of the element:

1, most HTML elements can be nested (can include other HTML elements)

2the HTML document is composed of nested HTML elements.

3. Don't forget the closing tag. Future versions of HTML will not allow omitting the closing tag.

4, empty html element

5. The html element with no content is called the empty content of the element, and the empty element is closed in the opening tag

Note:

The difference between empty elements and empty content: the opening and closing tags of empty elements are the same, focusing on the tag. Empty content means that the content within the element is empty and focuses on the content.

Basic structure of HTML

It's not a tag, it's just a declaration that helps browsers correctly reality web pages

Element is a container for all header elements

Tags are always in the head element and provide metadata about the HTML document

Tags are used to define style information for HTML documents

Define the title of the document

The text between is the content of web courseware.

Between the text description web pages

HTML attribute

Html tags can have attributes that provide more information about html elements

Attributes always appear as name / value pairs

Attribute values should always be enclosed in parentheses. Double quotation marks are the most common, but there is no problem using single quotation marks.

HTML comment

Comments can be inserted into the code to improve the readability of the code. Comments will not be displayed on the page and browsers will ignore them.

Format:

XML/HTML Code copies content to the clipboard

Untitled document

# box1 {

Background-color:red

}

.div1 {background:yellow;}

.div2 {border:1px solid # 000;}

I'm a link.

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