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Chapter 5. Introduction to JavaScript Games > The Game Code
5.2. The Game Code
This section examines the entire code for the game, deconstructing all the game elements and covering them in detail.
5.2.1. Game-Wide Variables
Here, the various game variables are defined; for clarity and convenience, the unchanging constants appear in all uppercase. $drawTarget refers to the play area, which is defined as a div element within the page:
