npm learning (f) of learning how to create Node.js modules npm (e) the use package.json

How to create Node.js modules

Node.js is a module can be published to npm package. When you create a new module, create the  package.json file is the first step.

You can use the  npm init command to create the  package.json file. The command line will prompt  package.json field values you need to enter. 名称（name） And  版本（version） these two fields is required. You also need to enter the  入口文件字段（main） field, of course, you can use the default value  index.js. These steps npm learning (e) the use package.json detailed explanation.

If you want (author) field added as author information, you can use the following format (mail and web site are the optional ones): Your Name <[email protected]> (http://example.com)

Created  package.json after file, you create the file entry module. If you use the default file name  index.js.

In this file, add a function as  exportsa property of the object. In this way, then require this document, this function in other code can be used.

exports.printMsg = function() {
  console.log("This is a message from the demo package");
}

Try:

1. Will be published to your package npm.
2. Create a directory outside your project.
3. Then  cd enter the new directory.
4. Execute  npm install <package> commands.
5. Test.js create a file, require this package, and a method in which a call.
6. Execute  node test.js commands. Whether the output console.log fill in the information?