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Sites that use CSS with either XHTML or HTML are easier to tweak so that they appear similar in different browsers (Chrome, Internet Explorer, Mozilla Firefox, Opera, Safari, etc.). Sites using CSS " degrade gracefully " in browsers unable to display graphical content, such as Lynx , or those so very old that they cannot use CSS.
The Cascading Style Sheets (CSS) specification describes how elements of web pages are displayed by graphical browsers. Section 4 of the CSS1 specification defines a "formatting model" that gives block-level elements—such as p and blockquote—a width and height, and three levels of boxes surrounding it: padding, borders, and margins. [4]
In some cases, it may be desirable to add clickable annotations to an image. The templates Template:Annotated image and Template:Annotated image 4 exist for this purpose. These templates allow wikitext (e.g., regular text, wikilinks, allowed HTML code, references, and other templates) to be included on the image itself. They may also be used to ...
See also Template:Easy CSS image crop, which simplifies the interface for this template a bit. {{CSS image crop}} creates a crop of an image inline for previewing the look and feel of a page, or for linking to full images when a slight crop is preferred in an article, but the full image is more encyclopaedic in general. Where only a small ...
packed All images aligned by having same height, justified, captions centered under images; packed-overlay Like packed, but caption overlays the image, in a translucent box; packed-hover Like packed-overlay, but caption is only visible on hover (degrades gracefully on screen readers, and falls back to packed-overlay if a touch screen is used)
To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...
These tags either have an alternate tag or a template that replaces their function with CSS; the tags are being replaced by editors on pages throughout Wikipedia (see Wikipedia:Linter for more details). See Wikipedia:HTML5 § Obsolete elements and attributes for more details on obsolete HTML parts and their replacements.
Alternate text is optional but recommended. See Alternate text for images for hints on writing good alternate text. To have some text to the left of an image, and then some more text below the image, then put in a single <br clear="all">. This will force following text down until the margins are free of floating images.