HTML, CSS, and Web Development Practices: Past, Present, and Future
Jens Meiert, October 15, 2009.
This entry is filed under Web Development, Accessibility, Usability, User Experience.
The following is the more detailed alternative version of today’s talk at Teaching the Web, Potsdam (a German version is available as well). While blog posts occasionally get updated, this one might not.
Index
- The Ideal World
- The Past (1990-1999)
- The Present (2000-2009)
- The Future (2010-2019)
- Priorities for Web Developers
- Development Practices Compared
The Ideal World
Figure: Shiny, maintainable web development world. Structure, presentation, and behavior all separated except for some minor overlap with respect to integration (style sheet references in HTML documents, for instance) and interfaces (scripts manipulating documents in a wise manner, for instance).
The Past (1990-1999)
Standards
- 1990: HTML 1.0 (Tim Berners-Lee)
- 1994: CHSS (Håkon Wium Lie)
- 1995: SSP (Bert Bos)
- 1995: HTML 2.0 (Tim Berners-Lee, Dan Connolly)
- 1995: HTML 3.0 (Dave Raggett)
- 1996: CSS 1 (Bert Bos, Håkon Wium Lie)
- 1997: HTML 3.2 (Dave Raggett)
- 1997: ECMA-262, edition 1 (Guy L. Steele, Jr.)
- 1998: CSS 2 (Bert Bos, Ian Jacobs, Chris Lilley, Håkon Wium Lie)
- 1998: ECMA-262, edition 2 (Mike Cowlishaw)
- 1999: WCAG 1.0 (Wendy Chisholm, Ian Jacobs, Gregg Vanderheiden)
- 1999: ECMA-262, edition 3 (Mike Cowlishaw)
- 1999: HTML 4.01 (Ian Jacobs, Arnaud Le Hors, Dave Raggett)
Development Practices
Figure: Heaps of presentational markup taking care of what would be the task of style sheets; scripts manipulating document contents but also eyes, thus overlapping both structure and presentation.
Problems
- Technology limitations
- Lack of features that soon got crucial
- Support limitations
- Implementations incomplete, inconsistent, or not interoperable (proprietary)
- Low output quality
- Inaccessible code
- Unmaintainable code
- Invalid code
- Bad experience
- Little awareness of and few conventions for usability
- Slow performance due to bloated sites and slow connections
The Present (2000-2009)
Standards
- 2000: XHTML 1.0 (Jonny Axelsson, Tantek Çelik, Steven Pemberton, et al.)
- 2001: XHTML 1.1 (Murray Altheim, Shane McCarron)
- 2006: XHTML 2.0 (Jonny Axelsson, Masayasu Ishikawa, Steven Pemberton, et al.)
- 2008: WCAG 2.0 (Ben Caldwell, Michael Cooper, Loretta Guarino Reid, et al.)
Development Practices
Figure: Behavior moving over to manipulate more documents in an obtrusive fashion (also known as AJAX; pun intended); structure overlapping less presentation, as authors learn to use less presentational markup.
Problems
- Technology limitations
- Lack of features related to web applications
- Support limitations
- Implementations primarily incomplete (see e.g. XHTML, CSS 2)
- Low output quality
- Not quite accessible code
- Unmaintainable code
- Invalid code
- Suboptimal experience
- Not enough awareness of and commitment on usability
- Slow performance due to bloated sites
The Future (2010-2019)
Standards
- 2010? CSS 2.1 (Bert Bos, Tantek Çelik, Ian Hickson, Håkon Wium Lie)
- 2010? ARIA 1.0 (Michael Cooper, James Craig, Lisa Seeman, et al.)
- 2010? ECMA-262, edition 5 (Allen Wirfs-Brock)
- 201…? CSS 3, in its entirety (Daniel Glazman, Ian Hickson, Håkon Wium Lie, et al.)
- 201…? HTML 5 (Ian Hickson)
Development Practices
Figure: Behavior backing off a bit, minding its own business a bit more; authors learning to separate even more structure, presentation, and behavior, without being quite there yet (aka “the ideal world”).
Problems
- Technology limitations
- Support limitations
- Implementations primarily incomplete (HTML 5, CSS 3)
- Low output quality
- Not quite accessible code
- Not quite maintainable code
- Invalid code
- Suboptimal experience
- Not enough awareness of and commitment on usability
- Slow performance due to bloated applications
Priorities for Web Developers
- Commitment to standards (and standardization)
- Emphasis on “non-volatile” best practices
- Appropriate use of technology (semantics, validation)
- Accessibility
- Performance
- Maintainability (separation of concerns)
- Focus on education
Development Practices Compared
Figure: Bubbles all over the place; authors using less presentational markup and manipulating documents and styling-related aspects in a less wild fashion over time.
Many thanks to Asim Janjua for his work on the talk’s visuals.
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Comments
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On October 16, 2009, 5:10 CEST, John Foliot said:
Nicely done Jens, a good read; must have been a great presentation. If you find yourself back in the Bay area any time soon, come and give the talk on campus. (Please)
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On October 20, 2009, 14:06 CEST, sriganesh said:
Very detail and new information for me.
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On October 20, 2009, 20:01 CEST, Jens Meiert said:
John, thank you … would love to give the talk again next time I’m in California! Might not be just during a visit though.
