What are the three representations of Css in HTML documents?
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1. Inline style sheet
An inline stylesheet refers to writing the CSS style code in the HTML tag, as follows:
Html
Inline CSS style.
Inline stylesheets are supported by the style of the HTML element of the HTML element, simply by separating the CSS code with a semicolon in the style= "". This is the most basic form, but it does not achieve the separation of performance from content and does not have the flexibility to control multiple pages, so we rarely use it.
two。 Internal style sheet
An internal stylesheet is similar to an inline stylesheet by writing CSS code in a HTML page, except that the former puts the stylesheet in a fixed place, as follows:
Html
Internal style sheet
H2 {font-size:16px
Color:#000FFF
}
Internal CSS style.
Internal stylesheet coding is a primary application form and cannot be used across pages, so it is not suitable for use.
3. External style sheet
External stylesheet is the best form in CSS application. It puts the CSS style code in an external file and then invokes it by web page. Multiple web pages can call a stylesheet, which maximizes the reuse of code and optimizes the configuration of Web site files, as follows:
Html
External style sheet
External CSS style.
The code in style.css is
Css
@ charset "UTF-8"
H2 {
Font-size:16px
Color:#000FFF
}
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