Include "space" check in email adress flutter

Question

Can someone please tell me how to add "space" check in email address? I have tried email.contains("") bt it didnt worked.

I don't get a error when i type invalid email

 import 'dart:async';


class Validators{
  final validEmail = StreamTransformer<String, String>.fromHandlers(
    handleData: (email, sink){
      if(email.contains('@')){
        sink.add(email);
      }else if(email.contains(" ")){
          sink.addError('Enter a valid email');
      }else{
          sink.addError('Enter a valid email');

      }
    }
  );

  final validPassword  = StreamTransformer<String, String>.fromHandlers(
    handleData: (password, sink){
      if(password.length > 4){
        sink.add(password);
      }else{
        sink.addError('Enter a valid password');
      }
    }
  );
}

I want "invalid email" error to be displayed as this

Solution

Contains works perfectly for me.

void main() {
  bool check;
  String email = 'tes [email protected]';

  check = email.contains(' ');

  print(check); // true
}

I have tried it on DartPad

Perhaps you forgot to put whitespace between quotes.

Comments

[Eugene]

Can you provide more details about the final result you are trying to achieve and maybe some code? You want to check if the user put only space or you want to detect space at any position in the entered line?

[sls]

I want to check if user inserts space in email adress code should return with invalid email adress

[sls]

Thank- you for your answer. Can u please look at my code and give answer according to it.

[Martyns]

@sls Updated answer

[Randal Schwartz]

No, see my answer.

[Randal Schwartz]

No, see my answer. Space is perfectly valid in an email address if quoted properly.