Node.js NPM

chapter


NPM is Node.js package (or modules) Manager.

www.npmjs.com have massive package on Node.js, available for free download.

When installing Node.js, NPM program will be installed.

What package / package is?

Package / package contains all the files needed for a module.

Modules can be imported into the JavaScript library used in the project.

Download Package

Download package is very simple. In the command line, execute npm insall 包the command.

Download and install the named upper-casepackage:

Kevin@QIKEGU G:\qikegu\nodejs> npm install upper-case

Now that you have downloaded and installed the first package!

NPM will be in the current directory, create a file named "node_modules" folder, the package will be placed on them. All future installation of the package will be placed in this folder.

The directory structure is shown below:

G:\qikegu\nodejs\node_modules\upper-case

Use Package

Once the package is installed, it can be used.

Introduced using "upper-case" package:

var uc = require('upper-case');

Node.js to create a file, the output "Hello World!" To uppercase letters:

Examples

var http = require('http');
var uc = require('upper-case');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.write(uc("Hello World!"));
  res.end();
}).listen(8080);

Save the above code as "demo_uppercase.js" file, use the Node launch the file:

Start demo_uppercase:

G:\qikegu\nodejs>node demo_uppercase.js

Open your browser to view the results URL: HTTP: // localhost: 8080

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Origin www.cnblogs.com/jinbuqi/p/11546926.html