In fact, you can use the browser-based CoffeeScript compiler
yourself, by including this
script in a page, marking up any CoffeeScript script tags with the
Obviously, in production, you don’t want to be interpreting CoffeeScript at runtime, as it’ll slow things up for your clients. Instead, CoffeeScript offers a Node.js compiler to pre-process CoffeeScript files.
npm install -g coffee-script
-g flag is important, as it
tells npm to install the
package globally, rather than locally. Without it, you won’t get the
If you execute the
executable without any command line options, it’ll give you the
CoffeeScript console, which you can use to quickly execute CoffeeScript
statements. To pre-process files, pass the
coffee --compile my-script.coffee
--output is not specified,
my-script.js. This will overwrite
files unintentionally. For a full list of the command line options available, pass
You can also pass the
option a directory, and CoffeeScript will recursively compile every file
coffee --output lib --compile src
If all this compilation seems like a bit of an inconvenience and bother, that’s because it is. We’ll be getting onto ways to solve this by automatically compiling CoffeeScript files, but first let’s take a look at the language’s syntax.
The following typographical conventions are used in this book:
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Shows commands or other text that should be typed literally by the user.
Constant width italic
Shows text that should be replaced with user-supplied values or by values determined by context.
This icon signifies a tip, suggestion, or general note.
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This book is here to help you get your job done. In general, you may use the code in this book in your programs and documentation. You do not need to contact us for permission unless you’re reproducing a significant portion of the code. For example, writing a program that uses several chunks of code from this book does not require permission. Selling or distributing a CD-ROM of examples from O’Reilly books does require permission. Answering a question by citing this book and quoting example code does not require permission. Incorporating a significant amount of example code from this book into your product’s documentation does require permission.
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If you feel your use of code examples falls outside fair use or the permission given above, feel free to contact us at email@example.com.
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