Graphics For Web
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The Web Wizard’s The Web Wizard’s Guide to HTML Guide to HTML Chapter One World Wide Web Basics
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Transcript of Graphics For Web
The Web Wizard’s The Web Wizard’s Guide to HTMLGuide to HTML
Chapter OneWorld Wide Web
Basics
Chapter ObjectivesChapter Objectives
Show how Web page authors and computers work together
Look behind the scenes when a browser displays a Web page
Explain what HTML is and how Web pages use HTML
Demonstrate how to create Web pages with nothing more than a text editor and a browser
Explore the role of HTML standards on the Web
To View the World Wide WebTo View the World Wide WebYou NeedYou Need
An Internet-ready computerAn Internet access accountA Web browser
To Create a Web SiteTo Create a Web SiteYou NeedYou Need
An Internet-ready computerA text editor (or Web page construction kit)An Internet access accountA password-protected account on a Web server
Uniform Resource LocatorUniform Resource Locator(URL)(URL)
All Web pages are addressed with URLsThe URL specifies
– A server name– A directory path– A filename
URLs are part of the HTTP (Hypertext Transfer Protocol) communications protocol.
Web Page DisplaysWeb Page Displays
All browsers are designed to display .html and .htm files
Browsers have to rework their page displays whenever a browser window is resized
Web pages can look a little different on different computers
Web page authors cannot completely control their page displays
The Hypertext Markup The Hypertext Markup Language (HTML)Language (HTML)
HTML formatting commands control Web page displays
All HTML formatting is achieved with HTML elements
All HTML elements are based on HTML tags and tag-pairs
HTML files can be created with text editors
A HTML TagTemplateA HTML TagTemplate<html><head>
<title> (insert text for the browser’s title bar here)</title>
</head><body>
(insert visible Web page elements here)</body>
</html>
HTML EditorsHTML Editors
Pros– Offer lots of useful features– Help you avoid tagging errors– Can save time
Cons– Can interfere with HTML mastery – Can be intimidating for beginners
The Web Page The Web Page Development CycleDevelopment Cycle
1. Save your HTML file
2. Load the file into your Web browser
3. Review the file with your Web browser
4. Revise your HTML file with a text editor
Repeat this cycle as often as needed
Industry StandardsIndustry Standards
Most HTML tags are in the official HTML standard
All HTML-compliant browsers recognize the standard HTML tag set
The World Wide Web Consortium (W3C) sets the industry standard for HTML
Non-Standard HTMLNon-Standard HTML
Some HTML tags are browser-specific extensions to HTML
Netscape Navigator and Internet Explorer do not always recognize each other’s HTML extensions
Web pages that use non-standard HTML may not display well for all users
Browser manufacturers create their own HTML extensions to influence the industry standard
HTML Validation ServicesHTML Validation Services
A validation service on the Web can check an HTML file for you
A validation service can be used to identify tagging errors and HTML extensions
Some HTML tagging errors are difficult to locate by manual inspection
If you don’t use an HTML editor, a validation service can be very helpful
