Email Validation in Javascript

EmailValidationCheck.js

let cases = {
    'firstName' : 'FirstName',
    'lastName' : 'LastName',
    'email': 'first_last@gmail.com',
    'salary': 500235
}

const verifiedEmail = !!cases["email"].match(/([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5})$/)

//  OR

function isValidEmail(employeeEmail){
     return !!employeeEmail.match(/([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5})$/)
}