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Different Types of Style Sheets


Different Types of Style SheetsExternal Style Sheets
An external Style Sheet is a template/document/file containing style information which can be linked with any number of HTML documents. This is a very convenient way of formatting the entire site as well as restyling it by editing just one file.

The file is linked with HTML documents via the LINK element inside the HEAD element. Files containing style information must have extension .css , e.g. style.css .

<HEAD>
<LINK REL=STYLESHEET HREF="style.css" TYPE="text/css">
</HEAD>

Embedded Style Sheets
Embedded style is the style attached to one specific document. The style information is specified as a content of the STYLE element inside the HEAD element and will apply to the entire document.

<HEAD>
<STYLE TYPE="text/css">
<!--
P {text-indent: 10pt}
-->
</STYLE>
</HEAD>

Note: The styling rules are written as a HTML comment, that is, between <!-- and --> to hide the content in browsers without CSS support which would otherwise be displayed.

Inline Style Sheets
Inline style is the style attached to one specific element. The style is specified directly in the start tag as a value of the STYLE attribute and will apply  exclusively to this specific element occurrence.

<P STYLE="text-indent: 10pt">Indented paragraph</P>

Imported Style Sheets
Imported Style Sheet is a sheet that can be imported to (combined with) another sheet. This allows creating one main sheet containing declarations that apply to the whole site and partial sheets containing declarations that apply to specific elements (or documents) that may require additional styling. By importing partial sheets to the main sheet a number of sources can be combined into one.

To import a style sheet or style sheets include the @import notation or notations in the STYLE element. The @import notations must come before any other declaration. If more than one sheet is imported they will cascade in order they are imported - the last imported sheet will override the next last; the next last will override the second last, and so on. If the imported style is in conflict with the rules declared in the main sheet then it will be overridden.

<LINK REL=STYLESHEET HREF="main.css" TYPE="text/css">
<STYLE TYPE="text=css">
<!--
@import url(http://www.and.so.on.partial1.css);
@import url(http://www.and.so.on.partial2.css);
.... other statements
-->
</STYLE>


Author's URL: Julian Freeman
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