To compute the md5 digest of a string or file, we can use npm package md5
npm install md5
To compute the md5 digest of a string
var md5 = require('md5')
console.log(md5('message'));
It can also compute the md5 digest of a file
var fs = require('fs');
var md5 = require('md5');
fs.readFile('package.json', function(err, buf){
console.log(md5(buf));
})