Given the following email address -- [email protected] -- how can I extract someone from the address using javascript?
Thank you.
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What have you already tried? Please see How to Ask and How much research effort is expected of Stack Overflow users?agilgur5– agilgur52025-08-18 16:46:48 +00:00Commented Aug 18 at 16:46
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10 Answers
Regular Expression with match
with safety checks
var str="[email protected]";
var nameMatch = str.match(/^([^@]*)@/);
var name = nameMatch ? nameMatch[1] : null;
written as one line
var name = str.match(/^([^@]*)@/)[1];
Regular Expression with replace
with safety checks
var str="[email protected]";
var nameReplace = str.replace(/@.*$/,"");
var name = nameReplace!==str ? nameReplace : null;
written as one line
var name = str.replace(/@.*$/,"");
Split String
with safety checks
var str="[email protected]";
var nameParts = str.split("@");
var name = nameParts.length==2 ? nameParts[0] : null;
written as one line
var name = str.split("@")[0];
Performance Tests of each example
8 Comments
Xarylem
Not sure about javascript semantics, but I would use this pattern: /.+(?=@)/
schabluk
In a functional manner:
str.split("@").reduce(user => user)
myfunkyside
@epascarello - Why aren't you (or anyone else here) using a simple
str.substring(0,str.indexOf("@"))? Since you have about 65 times as much reputation as me, I'm pretty sure I'm missing something, just don't know what..myfunkyside
@epascarello I like to think I can still learn from a 5 year old question. Same rules still largely apply. And if someone visits this page in 2022, I'd like to think that person can still learn something from your answer to my question.
Fernando Kosh
The link of JSPerf Tests are broken. :-/
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"[email protected]".split('@')[0]
1 Comment
Farzad Yousefzadeh
Like the simplicity of the solution
var email = "[email protected]";
var username = email.substring(0,email.indexOf('@'))
Comments
string.split(separator, limit) is the method you want
"[email protected]".split("@")[0]
Comments
username:
"[email protected]".replace(/^(.+)@(.+)$/g,'$1')
server:
"[email protected]".replace(/^(.+)@(.+)$/g,'$2')
Comments
You can generate or fetch a username from the email with the help of this npm package.
2. npm i generate-username-from-email
- Use this code to fetch the username from email:
const generateUsername = require('generate-username-from-email')
var email = "[email protected]"
var username = generateUsername(email)
console.log(username)
//Output: patidarparas13
Comments
My 2021 update. This will correctly output a username from an email address that contains multiple @ symbols. Just splitting with '@' is not safe as multiple are allowed if quoted.
function getUsernameFromEmail(email){
var domainArray = email.split('@')
var domain = domainArray[domainArray.length-1]
var reverseEmail = email.split( '' ).reverse( ).join( '' );
var reverseDomain = domain.split( '' ).reverse( ).join( '' );
var backwardUsername = reverseEmail.replace(reverseDomain+'@','')
var username = backwardUsername.split( '' ).reverse( ).join( '' );
return username;
}
console.log(getUsernameFromEmail('test@[email protected]'))
1 Comment
Sanskar Tiwari
if multiple allowed can we split from end? because the last used @ will be correct?
The example code below will return myemailaddress.
getUsername = (email) => {
return email.substring(0, email.lastIndexOf("@"));
}
const userEmail = '[email protected]';
getUsername(userEmail);
Comments
// Input: [email protected]. Output: Test User
// Split user email then capitalize each first character of word.
public getUserName(input: string): string {
if (!input) {
return ''
}
if (!input.includes('@')) {
return input;
} else {
const cleanedInput = input.split('@')[0]?.replace(/[^\w]/g, ' ').split(' ');
const capitalizedInput = cleanedInput?.map(word => {
return word[0]?.toUpperCase() + word.substring(1);
}).join(' ');
return capitalizedInput;
}
}
Comments
I have created a npm package to extract name from email. Please checkout here.
