Email validation in rails and javascript by rejex

RAILS EMAIL VALIDATION ===>

# email = email.split(" ").join('')

email = "rajpurohitnitin7@gmail.com"email = email.delete(' ')
if !/\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/.match(email).nil?

    p "valid email address"

end

JAVASCRIPT EMAIL VALIDATION ===>

var email = "rajpurohitnitin7@gmail.com" 

var re = /\S+@\S+\.\S+/var valid = re.test(email_address)if (!valid) {

   console.log("valid email addresss"); 

}

Tokenfield Email validation ====>

  $(".token_filed_class").on('tokenfield:edittoken', function (e) {  }).on('tokenfield:createdtoken', function (e) {         var re = /\S+@\S+\.\S+/         var valid = re.test(e.attrs.value)         if (!valid) {            $(e.relatedTarget).empty().hide().attr('data-value', '');            //$(".share_with_emails").on('tokenfield:removedtoken', function (e) {})           //$(e.relatedTarget).addClass('invalid')         }  }).on('tokenfield:removedtoken', function (e) {  }),  showAutocompleteOnFocus: false,  createTokensOnBlur:true});