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To use either, babel-core must be installed in your project: npm install -save-dev babel-core Or if youre running the coffee command outside of a project folder, using a globally-installed coffeescript module, babel-core needs to be installed globally: npm install -global babel-core by default, babel doesnt. You need to provide it with a configuration so that it knows what. One way to do this is by creating. Babelrc file in the folder containing the files youre compiling, or in any parent folder up the path above those files. (Babel supports other ways, too.) A minimal. Babelrc file would be just "presets "env". This implies that you have installed babel-preset-env : npm install -save-dev babel-preset-env Or -global for non-project-based usage see babels website to learn about presets and plugins and the multitude of options you have. Another preset you might need is transform-react-jsx if youre using jsx revelation with react (jsx can also be used with other frameworks). Once you have babel-core and babel-preset-env (or other presets or plugins) installed, and.
Require './ffee you must first register CoffeeScript as an extension: require 'coffeescript/register' App require './app' The. Coffee extension is optional If you want to use the compilers api, for example to make an app that compiles strings of CoffeeScript on the fly, you can require the full module: CoffeeScript require 'coffeescript' eval mpile 'console. Log "Mmmmm, i could really go for some Math. Pi the compile method has the signature compile(code, options) where code is a string of CoffeeScript code, and the optional options is an object with some or all of the following properties: urceMap, boolean: if true, a source map will be generated; and instead. LineMap, boolean: if true, output the source map as a base64-encoded string in a comment at the bottom. Lename, string: the filename to use for the source map. It can include a path (relative or absolute). Re, boolean: if true, output without the top-level function safety wrapper. Header, boolean: if true, output the generated by coffeeScript header.
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Use this flag to forward options directly to node. To pass multiple flags, use -nodejs multiple times. tokens Instead of parsing the coffeeScript, just lex it, and print out the token stream. Used for debugging the compiler. n, -nodes Instead of compiling the coffeeScript, just lex and parse it, and print out the parse tree. Examples: Compile a directory tree.
Coffee files in src into a parallel tree. Js files in lib: coffee -compile -output lib/ src/ Watch a file for changes, and recompile it every time essay the file is saved: coffee -watch -compile ffee concatenate a list of files into a single script: coffee -join project. Coffee print out the compiled js from a one-liner: coffee -bpe "alert i for i.10" All together now, watch and recompile an entire project as you work on it: coffee -o lib/ -cw src/ Start the coffeeScript repl (Ctrl-D to exit, Ctrl-Vfor multi-line. Js If youd like to use node. Js CommonJS to require coffeeScript files,.
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in the browser (see try coffeeScript ). To install, first make sure you have a working copy of the latest stable version of Node. You can then install CoffeeScript globally with npm : npm install -global coffeescript This will make the coffee and cake commands available globally. If you are using CoffeeScript in a project, you should install it locally for that project so that the version of CoffeeScript is tracked as one of your projects dependencies. Within that projects folder: npm install -save-dev coffeescript The coffee and cake commands will first look in the current folder to see if CoffeeScript is installed locally, and use that version. This allows different versions of CoffeeScript to be installed globally and locally. If you plan to use the -transpile option (see transpilation ) you will need to also install babel-core either globally or locally, depending on whether you are running a globally or locally installed version of CoffeeScript.
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