Understanding URLs and Links in Web Development
This content delves into the intricacies of Uniform Resource Locators (URLs) and their significance in web development. It covers topics such as URL structure, port numbers, query parameters, and fragments. Examples of absolute and relative URLs, along with anchor definitions and other uses of URLs like images, stylesheets, and embedded pages, are also discussed. Additionally, it provides insights into different ways URLs are utilized in creating online content.
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Presentation Transcript
Uniform Resource Locators (URLs) Scheme Port Number Query http://www.company.com:81/a/b/c.html?user=Alice&year=2008#p2 Host Name Hierarchical portion Fragment CS 142 Lecture Notes: URLs and Links Slide 1
<a> Examples Full URL: <a href="http://www.xyz.com/news/2009.html">2009 News</a> Absolute location in same site: <a href="/stock/quote.html"> same as http://www.xyz.com/stock/quote.html Relative location: <a href="2008/March.html"> same as http://www.xyz.com/news/2008/March.html Anchor definition: <a name="sec3">...</a> New location, same page: <a href="#sec3"> CS 142 Lecture Notes: URLs and Links Slide 2
Other Uses of URLs Images: <img src="icon.gif" /> Stylesheets: <link rel="stylesheet" type="text/css" href="main.css" /> Embedded page: <iframe src="http://www.google.com" /> CS 142 Lecture Notes: URLs and Links Slide 3
