Node.js File Paths
How to interact with file paths and manipulate them in Node.js
Table of Contents
Every file in the system has a path. On Linux and macOS, a path might look like:
/users/joe/file.txt while Windows computers are different, and have a structure such as:
You need to pay attention when using paths in your applications, as this difference must be taken into account.
You include this module in your files using
const path = require('path'); and you can start using its methods.
Getting information out of a path
Given a path, you can extract information out of it using those methods:
dirname: gets the parent folder of a file
basename: gets the filename part
extname: gets the file extension
You can get the file name without the extension by specifying a second argument to
Working with paths
You can join two or more parts of a path by using
You can get the absolute path calculation of a relative path using
In this case Node.js will simply append
/joe.txt to the current working directory. If you specify a second parameter folder,
resolve will use the first as a base for the second:
If the first parameter starts with a slash, that means it's an absolute path:
path.normalize() is another useful function, that will try and calculate the actual path, when it contains relative specifiers like
.., or double slashes:
Neither resolve nor normalize will check if the path exists. They just calculate a path based on the information they got.