CSS | Styles | Colors | Type | Classes-IDs | Layout | Properties | Value Types
CSS is the standard language for designing the layout of a webpage. A CSS file is any plain text file named with a .css extension. CSS is coded with XHTML.
External CSS is coded in a separate file with a .css extension. The CSS file is called by the XHTML file. The link is declared within the header element of the XHTML file. The <link /> tag is a self-closing tag that declares the file type and link to the CSS file...
Internal CSS is coded directly in the XHTML file. CSS styles are coded within the header element of the XHTML file, within the <style> and </style> tags. CSS styles are called by referencing the selected XHTML tag.
Inline CSS is coded directly within the body element of the XHTML file independent of any other references. The style attribute declares the property and value of the CSS style, which is coded directly within the selected XHTML tag...
External CSS is recommended for websites with several pages. Internal CSS is recommended for websites with fewer pages. Inline CSS is recommended for quick fixes and finishing touches. Inline styles take precedence when CSS methods conflict.
Comments can be added in CSS for notes or reminders. Comments are visible in the source code, but not the browser...
For debugging, CSS can be validated at jigsaw.w3.org/css-validator.
