how to validate email in node js

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Lukas
02 Nov 2019
1var emailRegex = /^[-!#$%&'*+\/0-9=?A-Z^_a-z{|}~](\.?[-!#$%&'*+\/0-9=?A-Z^_a-z`{|}~])*@[a-zA-Z0-9](-*\.?[a-zA-Z0-9])*\.[a-zA-Z](-?[a-zA-Z0-9])+$/;
2
3function isEmailValid(email) {
4    if (!email)
5        return false;
6
7    if(email.length>254)
8        return false;
9
10    var valid = emailRegex.test(email);
11    if(!valid)
12        return false;
13
14    // Further checking of some things regex can't handle
15    var parts = email.split("@");
16    if(parts[0].length>64)
17        return false;
18
19    var domainParts = parts[1].split(".");
20    if(domainParts.some(function(part) { return part.length>63; }))
21        return false;
22
23    return true;
24}
25