My first presentation of the "Foundation of Web Application Development" series, which I used in in-house training. Hope it useful for the others.
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Foundation of Web Application Developmnet - XHTML
1. XHTML
Foundation of Web Application Development - Part 1
Vashira Ravipanich
www.vashira.com
Tuesday, February 3, 2009 1
2. Road Map
• Build it! : XHTML
• Paint it! : CSS
• Make it fly! : JavaScript
• Hook with data! : Server Side Scripts
Tuesday, February 3, 2009 2
3. Road Map
• Build it! : XHTML We are here
• Paint it! : CSS
• Make it fly! : JavaScript
• Hook with data! : Server-Side Scripts
Tuesday, February 3, 2009 3
4. Let’s build the web
• Build web pages is not a difficult thing
• Just HTML and some styles
• Plenty of tools around
• Dreamweaver
• Even Visual Studio
• The problem is...
Tuesday, February 3, 2009 4
5. Let’s build the web
• You can’t master what you don’t really know
• Most WYSIWYG editors produce JUNK tags in
your works
• Even worst
• They usually insert massive in-line styles
• They mess up with structure layout
• They help, but not teach
• Back to basic - be Zen!
Tuesday, February 3, 2009 5
6. Let’s build the web
Any Text editor would be more
than enough!
Tuesday, February 3, 2009 6
7. Web Taxonomy
• Hyperlinks where is it?
• URL = Uniform Resource Locator
• HTTP = HyperText Transfer Protocol How to get it?
• Browser = HTML reader/interpreter
Display it
Tuesday, February 3, 2009 7
8. HTML
• What is HTML?
• Stands for HyperText Markup Language
• If you ever write a blog post, you probably
familiar with HTML already
• Current stable version is HTML 4
Tuesday, February 3, 2009 8
9. HTML markup
• Elements
• Attributes
• <element-name attribute=”value”>content</element-name>
• Tags - <p>, <ul>, <li>, <b>, <i>, <input>
• and a lot more...
Tuesday, February 3, 2009 9
11. Block or Inline?
• All elements belongs to either Block or
Inline
• Block - p, div, table
• Inline - span, b/strong, i/em, u, img, a
• Block CANNOT be inside Inline
• <em><p>content</p></em>
Tuesday, February 3, 2009 11
12. Common Attributes
• Core Attributes
• i18n Attributes
• Event Attributes
Internationalization
Count characters
between i and n
Tuesday, February 3, 2009 12
13. Core Attributes
• id - unique identifier Used by screen reader
• class - assign type
• title - add more information, show tooltip
• style - inject inline style
Tuesday, February 3, 2009 13
14. i18n Attributes
• dir - content direction ltr, trl
• xml:lang - en, de
Just forget it!
Tuesday, February 3, 2009 14
16. Text Elements
• paragraph - p
• line break - br
• emphasis - i/em
• head - h
• Two br IS NOT p
• Avoid i and b - using em and strong
Tuesday, February 3, 2009 16
17. Semantic HTML
Please...
• Two br IS NOT p
• Look like start a new paragraph
• What about the meaning?
• Avoid i and b - using em and strong
• Look similar
• What about the meaning?
• The problem is accessibility
Tuesday, February 3, 2009 17
18. XHTML
• eXtensible HTML
• Combination of XML and HTML
• Tags from HTML
• Rule from XML
Tuesday, February 3, 2009 18
19. Why XHTML?
• We are living in 2009
• Industry standards
• Cross browsers support
• Validated
Tuesday, February 3, 2009 19
20. XHTML structure
• One root element per document
• Properly nested elements
• Close elements
• Lowercase elements
Tuesday, February 3, 2009 20
21. Properly nested
elements
Bad Good
<p> <p>
this<strong>is<em> this<strong>is<strong>
</strong>wrong</em> <em>right</em>
</p> </p>
Tuesday, February 3, 2009 21
22. Closed elements
Bad Good
<p>paragraph1 <p>paragraph1</p>
<p>paragraph2 <p>paragraph2</p>
<br> <br />
<hr> <hr />
<img src=”icon.png”> <img scr=”icon.png” />
Tuesday, February 3, 2009 22
23. Lowercase elements
Bad Good
<P> <p>
paragraph3 paragraph3
<Img Src=”icon.png”/> <img src=”icon.png”/>
</p> </p>
Tuesday, February 3, 2009 23
24. More Syntax
Bad Good
<table WIDTH=100%>
<table width=”100%”>
<tr>
<tr>
<td>col1</td>
<td>col1</td>
</tr>
</tr>
</table>
</table>
<input checked>
<input checked=”checked”>
<option selected>
<option selected=”selected”>
</option>
</option>
Tuesday, February 3, 2009 24
25. Sample
<!DOCTYPE - html PUBLIC quot;-//W3C//DTD XHTML 1.0 Transitional//ENquot;
quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtdquot;>
<html>
<head> What does it means?
<title>Hello HTML</title>
</head>
<body>
<p>Hello World!!</p>
</body>
</html>
Tuesday, February 3, 2009 25
26. Document Type
Declaration
• Drive how browser render this document
• Beware - if not declare your document may
run in Quirks mode
and your life will be in
• XHTML 1.0 Transitional trouble!
Tuesday, February 3, 2009 26
27. Need to know more?
• There are plenty of (X)HTML tutorials
over the internet. Go and read some!
• Just Googling “XHTML”
• For me, wikipedia is a good place to get
started
• W3Schools is a good reference when you
forget some tags
as I always do :)
Tuesday, February 3, 2009 27
28. Need to know more?
Read these useful books
Tuesday, February 3, 2009 28
29. Foundation of Web Application
Development Series
• Part 1 - XHTML
• Part 2 - CSS Others are
coming soon!
• Part 3 - JavaScript
• Part 4 - Server-Side Scripts
Tuesday, February 3, 2009 29