Get Programming with JavaScript

Chapter 13. Modules: breaking a program into pieces

This chapter covers

• Importing code into JS Bin with script elements
• Avoiding repeated variable names
• Running functions without assigning them to variables
• Using modules to organize your (shared) codebase

As the applications you develop become larger, involving more and more variables, objects, arrays, and functions, it can become harder and harder to work efficiently within a single program file. Good text editors and development environments can help, but even with their tools, it quickly becomes a good idea to split the code across multiple files.

For example, in The Crypt you have spacer, players, places, maps, and the game logic itself. You’ve probably noticed how long the code ...