Head First JavaScript Code: Chapter 4, Decision Making

Chapter 4 Opening Image

Life is all about making decisions.

Head First JavaScript

Stop or go, shake or bake, plea bargain or go to trial... without the ability to make decisions, nothing would ever get done. It works the same in JavaScript—decisions allow scripts to decide between different possible outcomes. Decision-making drives the "story" of your scripts, and even the most mundane scripts involve a story of some sort. Do I trust what the user entered and book her a trip on a Sasquatch expedition or do I double-check that maybe she really just wanted to ride a bus to Saskatchewan? The choice is yours to make!

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Code Description and Viewing

Stick Figure Adventure

The Stick Figure Adventure web page is built incrementally throughout the chapter. Each numbered HTML file corresponds to an incremental version of the web page. When a page number appears beside a file, it is either the page where the file's contents are presented or the exercise (solution) corresponding to the file.

  • sfa1.html - Stick Figure Adventure web page with tiered decision making (page 160)
  • sfa2.html - Stick Figure Adventure web page that only displays a description message when it is available (page 164)
  • sfa3.html - Stick Figure Adventure web page with comments (page 167)
  • sfa4.html - Stick Figure Adventure web page reworked using a switch statement (page 182)
  • scene0.png - Scene 0 image that appears on the Stick Figure Adventure web page
  • scene1.png - Scene 1 image that appears on the Stick Figure Adventure web page
  • scene2.png - Scene 2 image that appears on the Stick Figure Adventure web page
  • scene3.png- Scene 3 image that appears on the Stick Figure Adventure web page
  • scene4.png - Scene 4 image that appears on the Stick Figure Adventure web page
  • scene5.png - Scene 5 image that appears on the Stick Figure Adventure web page
  • scene6.png - Scene 6 image that appears on the Stick Figure Adventure web page
  • scene7.png - Scene 7 image that appears on the Stick Figure Adventure web page
  • scene8.png - Scene 8 image that appears on the Stick Figure Adventure web page
  • scene9.png - Scene 9 image that appears on the Stick Figure Adventure web page