Node.js Tutorial - Node.js Path Module

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Use require('path') to load Path module.

The path module has functions that works with the file/path string.

For example, path.join uses the forward slash / on UNIX-based systems like Mac OS X vs. backward slash \\ on Windows systems.

path.normalize(str)

This function fixes up slashes to be OS specific, takes care of . and .. in the path, and also removes duplicate slashes.

var path = require('path'); 
/*  w ww .j  a v  a 2 s  .c  o  m*/
// Fixes up .. and . 
// logs on Unix: /myData 
// logs on Windows: \myData 
console.log(path.normalize('/myData/myValue/..')); 

// Also removes duplicate '//' slashes 
// logs on Unix: /myData/myValue 
// logs on Windows: \myData\myValue 
console.log(path.normalize('/myData//myValue/bas/..')); 

The code above generates the following result.

path.join([str1], [str2], ...)

This function joins any number of paths together, taking into account the operating system.

var path = require('path'); 

// logs on Unix: myData/myValue/bas 
// logs on Windows: myData\myValue\bas 
console.log(path.join('myData', '/myValue', 'bas')); 

The code above generates the following result.

This function joins any number of paths together, taking into account the operating system.

var path = require('path'); 

// logs on Unix: myData/myValue/bas 
// logs on Windows: myData\myValue\bas 
console.log(path.join('myData', '/myValue', 'bas')); 

The code above generates the following result.

dirname, basename, and extname

path.dirname gives you the directory portion of a specific path string (OS independent).

path.basename returns the name of the file.

path.extname gives you the file extension.

var path = require('path'); 

var completePath = '/myData/myValue/bas.html'; 

console.log(path.dirname(completePath)); 
console.log(path.basename(completePath)); 
console.log(path.extname(completePath)); 

The code above generates the following result.

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