Non-standard HTML tags
In the early years of the World Wide Web, the standards which today are used in most web browsers and web pages were mostly non-existent. Different browsers and HTML editors were being offered by competing vendors such as Netscape and Microsoft, all of whom possessed their own IDeaS for how web sites should be constructed. These varying standards resulted in web developers coding for specific web browsers, using tags which could often be recognized by only one browser.
List of Non-standard HTML tags
Tag |
Function |
Supported first by |
|---|---|---|
Used to display the audioscope, a graphical display of sound waves |
WebTV |
|
Used to add sound to the background of a website |
Internet Explorer |
|
Used to display text in a double-weight bold font face |
WebTV |
|
Used to display a blinking text |
Netscape |
|
Used to display a blockquote |
WebTV, HTML 3.0 |
|
Used to allow the addition of comments to HTML documents |
Internet Explorer, WebTV |
|
Used to allow the automatic display of a plug-in |
Netscape |
|
Footnotes |
WebTV, HTML 3.0 |
|
Inline layers |
Netscape (4 only) |
|
Synonym of |
||
Encryption |
Netscape |
|
Used to create multiple layers of text and images which lay on top of each other in a given order |
Netscape (4 only) |
|
Used to set the width of the text display |
WebTV |
|
Succeeded by <pre>...</pre> tag; displays preformatted text |
W3C |
|
Used to display a scrolling, marquee-like text. |
Internet Explorer, WebTV |
|
Used to format and display a multiple column of text and images |
Netscape |
|
Prevents any line breaks from occurring within the flow of a text |
||
Displays an alternative text for browsers which do not recognize the |
Netscape |
|
Prevents regular single '...' and double "..." quotes from automatically being replaced with smart single ‘...’ and smart double “...” quotes |
WebTV |
|
Designates that all HTML tags be ignored, and to display the page as is |
||
<rt> |
Denotes and annotates the pronunciation text used by the text |
Internet Explorer |
<ruby> ... </ruby> |
Container for ruby character notation. Later a W3C recommendation |
Internet Explorer |
Inserts server-side JavaScript into an HTML document |
Netscape Enterprise Server |
|
Adds shadow to text |
WebTV |
|
Creates a sidebar window that displays control elements |
WebTV |
|
Adds white space between words |
Netscape |
|
Placed inside a |
||
Delimits an XML data island inside an HTML page |
Internet Explorer |
|
Similar to PRE, but ignores all HTML tags within and displays as is. Deprecated by W3C HTML version 3.2 |
References
See also
- web standards