retrieve domain from email address node js

Retrieving Domain from Email Address in Node.js

Have you ever needed to extract the domain name from an email address in your Node.js code? Perhaps you want to verify that the email is coming from a legitimate source, or maybe you want to use the domain name for some other purpose. Whatever the reason, it's a useful skill to have.

Method 1: Using Split() and Slice() Methods

One way to retrieve the domain name from an email address is by using the split() and slice() methods.

const email = '[email protected]';
const domain = email.split('@')[1].slice(0, -4); // "example"

The split('@') method splits the email address into an array with two elements: the username and the domain name. We then use [1] to access the second element (the domain name) and slice(0, -4) to remove the last 4 characters (".com", ".org", etc.) from the domain name.

Method 2: Using Regular Expressions

Another way to retrieve the domain name from an email address is by using regular expressions.

const email = '[email protected]';
const domain = email.match(/@([A-Za-z0-9_\-\.]+)\.[A-Za-z]{2,}/)[1]; // "example"

The regular expression looks for the "@" symbol, followed by any combination of letters, numbers, underscores, hyphens, and periods. It then looks for the period and two or more letters to identify the top-level domain (TLD). The parentheses capture the domain name as a group, which we access using [1].

Conclusion

Both of these methods are effective for retrieving the domain name from an email address in Node.js. Choose the one that works best for your specific use case.