Javascript Email Mask

emailmask.js

/* 
	Create a Mask in an email address
	This function create a mask using a valid email address.
	This is usefull when someone need to confirm the email used in a system
	Author: Gabriel Froes - https://gist.github.com/gabrielfroes
 */
function emailMask(email) {
	var maskedEmail = email.replace(/([^@\.])/g, "*").split('');
	var previous	= "";
	for(i=0;i<maskedEmail.length;i++){
		if (i<=1 || previous == "." || previous == "@"){
			maskedEmail[i] = email[i];
		}
		previous = email[i];
	}
	return maskedEmail.join('');
}

// Usage:
//	console.log ( emailMask("[email protected]") );
// Output: my.e****@m*******.c**

excellent code 👌

Excelwnte

Perfect code, thanks!!! 💪

I add some changes to show one char before @

function emailMask(email: string) {
var maskedEmail = email.replace(/([^@\.])/g, '*').split('')
var previous = ''
let j = 0
for (let i = 0; i < maskedEmail.length; i++) {
if (i <= 1 || previous === '.') {
maskedEmail[i] = email[i]
} else if (maskedEmail[i] === '@') {
j = i - 1
maskedEmail[i] = email[j] + email[i] + email[i + 1]
}
previous = email[i]
}
return maskedEmail.join('')
}