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HTML and CSS Advanced

Neal Stublen nstublen@jccc.edu. HTML and CSS Advanced. Course Road Map. Create web page layouts using CSS Manage CSS Test website validity Create navigation menus using CSS Incorporate meta content and multimedia. Chapter 5: Incorporating Meta-Content and Multimedia. What’s Ahead?.

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HTML and CSS Advanced

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  1. Neal Stublen nstublen@jccc.edu HTML and CSS Advanced

  2. Course Road Map • Create web page layouts using CSS • Manage CSS • Test website validity • Create navigation menus using CSS • Incorporate meta content and multimedia

  3. Chapter 5:IncorporatingMeta-Content and Multimedia

  4. What’s Ahead? • Refresh and redirect pages • Link media to a web page • Embed media in a web page

  5. Refresh to Update Content • If your site’s content may change… • Stock prices, sports scores, traffic information You can try to reload the page every 30 seconds… <meta http-equiv=“refresh” content=“30” />

  6. Redirect to New Content • If your site’s content has moved… • Site redesign, newer information You can redirect to another page… <meta http-equiv=“refresh” content=“5;url=http://site.com/page.html” />

  7. Any Gotchas? • What should you consider when refreshing and redirecting pages?

  8. Some Gotchas! • Browsers may allow the user to disable refreshes and redirects that are specified in meta tags • Redirects should include a message to indicate what’s happening along with a link to the new page • You may refresh the page and interrupt the user (this could be annoying)

  9. Practice Activity • Refresh a page, Activity 1 • Specify a page refresh (p.118) • Redirect a page, Activity 2 • Specify a page redirect (p.120)

  10. Refresh Alternative • Use JavaScript and AJAX to update only portions of the page that may have changed • Faster, less obtrusive • Consider Gmail when you delete a message • (Evening class scheduled for October)

  11. What’s Ahead? • Refresh and redirect pages • Link media to a web page • Embed media in a web page

  12. Practice Activity • Refresh a page, Activity 3 • Specify a page refresh (p.124)

  13. What’s Ahead? • Refresh and redirect pages • Link media to a web page • Embed media in a web page

  14. Alternative to Linking • Embedding media in a web page allows the user to play the media without leaving the page • YouTube • Adobe Flash

  15. Object Elements • <object> elements can be used to embed media files on a page • Media playback occurs within the browser • The attributes of the <object> element help the browser locate the media content • <param> elements also help control media playback

  16. <object> Example <object standby=“Loading audio…” type=“application/x-mplayer2” data=“media/coffee.mp3” width=“320” height=“45”> <paramname=“src” value=“media/coffee.mp3” /> <param name=“autostart” value=“true” /> </object>

  17. MIME Types • The type attribute identifies the media type for the embedded content • It helps the browser locate the appropriate plug-in for playback • Not always necessary; it will depend on the media and the browser

  18. Sample MIME Types audio/x-ms-wma (Windows Media) audio/x-wav (WAV audio files) audio/mpeg (MP3 audio files) video/x-ms-wmv (Windows Media) video/quicktime (Quicktime Media) application/x-shockwave-flash (Flash) application/x-mplayer2 (Windows Media)

  19. Practice Activity • Activity 5-4 (p.131) • Embedding a WMV file • Activity 5-5 (p.134) • Embedding an MP3 file • Activity 5-6 (p.137) • Embedding an MOV file • Activity 5-67 (p.144) • Embedding an SWF file

  20. Practice Activity • Most importantly…YouTube • We’ll go back and modify Activity 5-4 to embed a YouTube video instead of a WMV file.

  21. HTML5 Media Additions • The newest version of the HTML specification includes <audio> and <video> elements for embedding media • These would be preferable to using <object> elements • (Evening classes scheduled for June and September)

  22. What’s Behind? • Refresh and redirect pages • Link media to a web page • Embed media in a web page

  23. Bonus Content:Tracking Site Changes

  24. Oops! That’s Bad… • Your site is published online • You want to make changes • What if you mess up and need to start over? • What if you can’t get back to where you started?

  25. A Simple Solution • Archive the folder for the current version of your site • site_folder site_folder.v01 • Begin making changes to a copy of that original version

  26. Compare Versions • Tools allow you to compare one folder’s content with another folder’s content • Microsoft Code Compare (free) • Beyond Compare (not free) • Araxis Merge (even less free, but supports OSX) • I’m certain there are others; these are just the ones I’ve used.

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