How to format and validate email node js

Use regular expression something like that:

Solution 1:

^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$

Sample code:

const emailToValidate = 'a@a.com';const emailRegexp = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;console.log(emailRegexp.test(emailToValidate));

Solution 2:

Because you use angular, you are able to validate the email on front-end side by using Validators.email.

If you check angular source code of Validators.email here, you will find an EMAIL_REGEXP const variable with the following value:

/^(?=.{1,254}$)(?=.{1,64}@)[-!#$%&'*+/0-9=?A-Z^_`a-z{|}~]+(\.[-!#$%&'*+/0-9=?A-Z^_`a-z{|}~]+)*@[A-Za-z0-9]([A-Za-z0-9-]{0,61}[A-Za-z0-9])?(\.[A-Za-z0-9]([A-Za-z0-9-]{0,61}[A-Za-z0-9])?)*$/;

You could use it on back-end side too, to validate the input.

You can use email validator module:

var validator = require("email-validator");validator.validate("test@email.com");

Or, if you don't want any dependencies:

var 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])+$/;function isEmailValid(email) {    if (!email)        return false;    if(email.length>254)        return false;    var valid = emailRegex.test(email);    if(!valid)        return false;    // Further checking of some things regex can't handle    var parts = email.split("@");    if(parts[0].length>64)        return false;    var domainParts = parts[1].split(".");    if(domainParts.some(function(part) { return part.length>63; }))        return false;    return true;}

Source:

https://www.npmjs.com/package/email-validator

https://github.com/manishsaraan/email-validator/blob/master/index.js