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A CSS (Cascading Style Sheet) contains information about page formatting. It can include data related to every HTML element. For example, it can define the font face, size, and color of the <h1> tag.
An external style sheet.
Three Ways to Insert CSSThere are three ways of inserting a style sheet: External style sheetInternal style sheetInline style An external style sheet is ideal when the style is applied to many pages. With an external style sheet, you can change the look of an entire Web site by changing one file. Each page must link to the style sheet using the tag. The tag goes inside the head section: An external style sheet can be written in any text editor. The file should not contain any HTML tags. Your style sheet should be saved with a .css extension. An example of a style sheet file is shown below: hr {color:sienna;}p {margin-left:20px;}body {background-image:URL("images/back40.gif");}
The cascading that is referred to in the name cascading style sheets refers to how rules can cascade in how they are implement. CSS rules can be found in three places: an external style sheet, and internal style sheet, or inline. Cascading refers to precedence. A rule located inline, will take precedence over a rule located in an internal style sheet and a rule located in an internal style sheet will take precedence over a rule located in an external style sheet. Within a single style sheet (for example an external style sheet) a rule located at the bottom of the style sheet takes precedence over a rule located at the top of the style sheet. This allows you fine tuned control over your styles and how and when they display and which one will display based upon where in the cascading hierarchy they appear.
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It sounds like you want: External Style = P.photobox { } <p class="photobox">Blah Blah Blah</p>
When you create an external style sheet for your Web pages, you should name the file following similar naming conventions for your HTML files. When you save it, you use the file extension .css so the browser will recognize that it is a CSS stylesheet.
An external style sheet written to the Cascading Style Sheet standards will have a .css file extension. If you are using notepad you will have to manually set this as the file extension. Most web editors will allow you to select this extension when you go to save the file.
Let following be HTML page: <HTML> <head> <link href='external_style.css' type='text/css' rel='stylesheet'> </head> <body> <p>Hello world</p> </body> </HTML> and following be external css script: p {text-decoration:underline} Here is HTML document, in the head section tag <link> is used. Tag link is used to get reference of external style sheet page named "external_style.css" using href property. Both css page and HTML page resides in same directory. the external css page cannot contain any tags like:<HTML> or <style> it can contain only style specification like: p {font-size : 8pt} H1 {text-decoration:underline} etc
Internal style sheets are defined within the HTML document using the tag, while external style sheets are stored in separate CSS files and linked to the HTML document using the tag. External style sheets allow for better organization and easier updating of styles across multiple web pages.
The conflicting style rules are resolved by introducing internal and external CSS. It defined a common cascading style sheet for all.
Benefits: One file can be used to control multiple documents having different styles. Multiple HTML elements can have many documents, which can have classes. To group styles in composite situations, methods as selector and grouping are used. Demerits: Extra download is needed to import documents having style information. To render the document, the external style sheet should be loaded. Not practical for small style definitions.