A simple module to mask emails, domains and even regular strings!
To set up datamask.js on your Node.js server use npm.
npm install datamask
var datamask = require('datamask');
//email(address, mask_char, user_percent, domain_percent)
console.log(datamask.email('[email protected]')); //t**t@e****le.com
console.log(datamask.email('[email protected]', '#', 45, 80)); //t#st@e#####e.com
//string(value, mask_char, percent)
console.log(datamask.string('I\'m a string!', '*', 30)); //I'm a***ring
//domain(value, mask_char, percent)
console.log(datamask.domain('example.com', '*', 50)); //ex***le.com