In general it keeps your code better organized. If I have a class or 2 that is specific to one page, I'll use the 1st option in additon to the external style sheet that has my site's shared css to define those styles.
If I have more than that, I'll create a new external style sheet for that page. It just all depends on how you want to organize your code. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta.
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This attribute specifies alternative style sheet sets. This attribute specifies that the styles only apply to the elements of its parent s and children. If you want to use the attribute now, you can use a polyfill.
This specification allows you to define the broad categories of media a given style sheet is applicable to. This allows user agents to avoid retrieving inappropriate style sheets. Style sheet languages may include features for describing media dependencies within the same style sheet.
The current proposal addresses these issues by allowing authors to include rendering instructions within each HTML element. The rendering information is then always available by the time the user agent wants to render each element.
In many cases, authors will take advantage of a common style sheet for a group of documents. In this case, distributing style rules throughout the document will actually lead to worse performance than using a linked style sheet, since for most documents, the style sheet will already be present in the local cache.
The public availability of good style sheets will encourage this effect. The sample default style sheet for HTML 4 that is included in [CSS2] expresses generally accepted default style information for each element. Authors and implementors alike might find this a useful resource. Any style sheet language may be used with HTML.
A simple style sheet language may suffice for the needs of most users, but other languages may be more suited to highly specialized needs. The syntax of style data depends on the style sheet language. Authors must specify the style sheet language of style information associated with an HTML document. Authors should use the META element to set the default style sheet language for a document.
The default style sheet language may also be set with HTTP headers. User agents should determine the default style sheet language for a document according to the following steps highest to lowest priority :.
Documents that include elements that set the style attribute but which don't define a default style sheet language are incorrect. The syntax of the value of the style attribute is determined by the default style sheet language. For example, for [[CSS2]] inline style, use the declaration block syntax described in section 4. For optimal flexibility, authors should define styles in external style sheets. It is an error to render the content as part of the document's text. Some style sheet languages support syntax for hiding the content from non-conforming user agents.
Some style sheet implementations may allow a wider variety of rules in the STYLE element than in the style attribute. To specify that this style information should only apply to H1 elements of a specific class, we modify it as follows:. Finally, to limit the scope of the style information to a single instance of H1 , set the id attribute:. When combined with style sheets, these elements allow users to extend HTML indefinitely, particularly when used with the class and id attributes.
In the following example, we use the SPAN element to set the font style of the first few words of a paragraph to small caps. In the following example, we use DIV and the class attribute to set the text justification for a series of paragraphs that make up the abstract section of a scientific article. This style information could be reused for other abstract sections by setting the class attribute elsewhere in the document.
HTML allows authors to design documents that take advantage of the characteristics of the media where the document is to be rendered e. By specifying the media attribute, authors allow user agents to load and apply style sheets selectively.
Please consult the list of recognized media descriptors. The following sample declarations apply to H1 elements. When projected in a business meeting, all instances will be blue. When printed, all instances will be centered. Media control is particularly interesting when applied to external style sheets since user agents can save time by retrieving from the network only those style sheets that apply to the current device.
For instance, speech-based browsers can avoid downloading style sheets designed for visual rendering. See the section on media-dependent cascades for more information. HTML allows authors to associate any number of external style sheets with a document.
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