Leven is a popular npm package that leverages the Levenshtein distance algorithm to measure the difference between two strings. The Levenshtein distance algorithm is widely appreciated for its ability to compute a numerical distance between two strings based on how many changes would be needed to transform one string into the other. Whether it's for comparing text inputs, analyzing language patterns or various other tasks, the leven package comes in handy due to its simplicity and effectiveness in calculating string differences.

How do you use leven?

To use the leven package, you first need to install it via npm by running $ npm install leven in your command line. Then, you can import the module to your JavaScript file like so: import leven from 'leven';.

Once you've imported the module, you can start using it to compare two strings. For instance:

import leven from 'leven';

console.log(leven('cat', 'cow')); 
// Output: 2

In this example, the leven module calculates that transforming the string 'cat' into 'cow' would require two changes – hence, the output of 2.

Where are the leven docs?

Detailed documentation about the leven module can be located on its GitHub page at git+https://github.com/sindresorhus/leven.git. Here, you will find essential information about the usage and implementation of the leven package, along with a link to professional support for this package with a Tidelift subscription, for companies that want assurances about security, maintenance, and licensing for their dependencies.