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css. Presented by Hyeyoung Kim INF385E Information Architecture and design 25, . HTML vs HTML + CSS CSS syntex Selector CSS implementation (imbedded/external/inline) CSS property. What is CSS? Why was CSS created? CSS pros & Cons CSS browsers support CSS specification.

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  1. css Presented by Hyeyoung Kim INF385E Information Architecture and design 25, • HTML vs HTML + CSS • CSS syntex • Selector • CSS implementation • (imbedded/external/inline) • CSS property • What is CSS? • Why was CSS created? • CSS pros & Cons • CSS browsers support • CSS specification

  2. What is CSS (Cascading Style Sheets)? A simple styling language which allows attaching style in to HTML • Style : the rule to control the appearance of various properties • Style Sheets : text file(.css) containing the styles

  3. What is CSS (Cascading Style Sheets)? • Cascade :Major concept in avoiding conflicting styles within a document…. :Basically, “the lower an element is within the document, the higher the priority it is given ”.

  4. Why was CSS created? • Web site become large and stylish • HTML : originally designed for indicating the structure of a document • CSS : W3C : to separate content from its appearance (to distinguish structure from style) www.westciv.com

  5. CSS pros & cons Pros:( by Nick Badbury) • more control over the design of web page • Structured content in web document • Easier to update web site • possible to decide how web page look when printed (@media) • Cons: • Inconsistent browsers support • Bugs

  6. Browser support table Y=supported, P=partial, B=buggy, N=no

  7. CSS browsers support • Internet Explore : • Netscape navigator : • Opera : Browser info: http://www.westciv.com/style_master/academy/browser_support/index.html Bug info : http://www.richinstyle.com/bugs/ Validation info : http://jigsaw.w3.org/css-validator/validator-upload.html

  8. CSS specification more precise formatting than HTML (W3C) http://www.w3.org/Style/CSS/ • CSS1(1996) : extensively supported • CSS2(1998) : built in CSS1 + a variety of properties : very limited support in most browsers • CSS2, revision1(2003)

  9. HTML vs HTML + CSS HTML : myfile.html HTML+CSS : myfile.html : myfile.html + mystyle.css

  10. CSS rule Syntax • Selector : equivalent of HTML element(s) • Declaration :style attached to a specific selector www.westciv.com

  11. Class selector & ID selector <head><style> .navbar{…} .title{background :white} #specialtitle{ background :ff99f} </style></head> <body> <ul class=”navbar”> <li class=”title”>What is CSS? <li class=”title”>CSS standard <li class=”title”>CSS syntax <li id=”specialtitle”>Link </ul> • Class selector : like ‘customized’ tag • ID selector :almost similar but only one occurrence <head><style> #adbar {postion: fixed; height: 20%}#menu {position: fixed; width: 20%; top: 20%}#main {position: fixed;top: 20%; left: 20% </style></body> <body><DIV id="adbar"> .</DIV><DIV id="menu"> . </DIV><DIV id="main"> . .</DIV></BODY>

  12. Adding style to HTML documents • Inline style :the style attached to one specific element • Embedded style sheet :the style attached to one specific document • External style sheets :style sheets to format and restyle the entire web site :method - link / @import

  13. Adding style to HTML documents • Inline style • Embedded style sheet • External style sheets: link , @import <body> <h2 style=”color: blue”>inline style</h2> //inline </body> <head> <title>My first styled page</title> <style type=”text/css”> //embedded body{ color: #661400; background-color: rgb(194,255,102) } </style> </head >

  14. Adding style to HTML documents • Inline style • Embedded style sheet • External style sheets: link , @import <head> <link rel=”stylesheet” href=”mystyle.css” type=”text/css”> //link </head> <head> <style type=”text/css”> @import url(mystyle.css); @import url(mystyle_head.css); //import </style> <head>

  15. Properties To validatehttp://jigsaw.w3.org/css-validator/validator-upload.html

  16. Properties Examples P:first-letter Various font-size stylish table clear : float :left

  17. myfile.html (content) <html> <head> <title>My new first styled page</title> <style type="text/css"> #specialtitle { background :#ccebff; font-weight: 600} .heading {font-weight:900} ul{ list-stle-type:circle } ul li { margin: 0.5em 0; padding: 0.3em; border-right: 1em solid black } ul a {text-decoration: none } a:link {color: blue } a:visited {color: purple } address { margin-top: 1em; padding-top: 1em; border-top: thin dotted } body { padding-left: 11em; font-family: Georgia, "Times New Roman",Times, serif; color: #661400; background-color: rgb(194,255,102) } .navbar { list-style-type: none; padding: 0; margin: 0; position: absolute; top: 2em; left: 1em; width: 9em } h1 { font-family: Helvetica, Geneva, Arial,SunSans-Regular, sans-serif ; color :#cc2900} span{ text-decoration:underline} .title{ background : white ; font-weight: 600} mystyle.css (style) </style> </head> <body> ……… </body> </html>

  18. fromEmbedded to External • myfile.html (content) + mystyle.css(style) :external style sheets (link) //myfile.html <html> <head> <link rel=”stylesheet” href=”mystyle.css” type=”text/css”> </head> <body>….</body> </html>

  19. example

  20. reference • Niederst,J.(2001) Web design in a nutshell (2nd ED). Sebastopol,CA.: O’Reilly & Associates, Inc. • Carey, P.(2001). Creating Web Pages with HTML and Dynamic HTML. Thomson Learning • Meyer,E.A.(2004). Cascading Style Sheets. Sebastopol,CA.: O’Reilly & Associates, Inc. • Dean,D.(2000). Cascading Style Sheets for Dummies. Indianapolis,IN: Dummies Press • Allsopp,J & Sherrin M.(n.d.).The Complete CSS guide. Retrieved October 20, 2004. from http://www.westciv.com/courses/course_info/complete_css_guide/index.html • Bos,B (2004/10/21). Cascading Style Sheets home page. Retrieved October 20, 2004 from http://www.w3.org/Style/CSS/learning • Sanders,B (2004). HTML/CSS Course. Retrieved October 20, 2004 from http://sandwil.beigetower.org/HTMLcourse/index.php • Lawang,B(n.d.). RichInStyle.com CSS bug table. Retrieved October 20, 2004 from http://www.richinstyle.com/bugs/table.html

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