how can you validate an email as invalid when the email don't have the .com in flutter?

Question

I'm wondering, can you validate an email without the .com as invalid in Flutter

Example:
johnny@gmail.com = true
johnny@johnny    = false

Have you tried to google search about this make sure to search on google if you not get answer then only ask Question here. — Vishal Parmar, Mar 31 '22 at 08:55
@VishalParmar I tried to search it and I found someone else stack, but the regex doesn't validate if the email have or don't have the .com. So I want to make sure by asking a question — Monster Eat, Mar 31 '22 at 09:03

PandaCórdoba · Accepted Answer · 2022-03-31T08:33:03.127

4

What I use for my email validators is this:

String? validateEmail(String email) {
    const String pattern =
        r'^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$';
    final RegExp regex = RegExp(pattern);
    if (email.isEmpty || !regex.hasMatch(email)) {
      return 'Invalid email';
    } else {
      return null;
    }
  }

hope it helps.

Example:
johnny@gmail.com = true
johnny@johnny.co    = true
johnny@johnny    = false
johnny@    = false
johnny    = false
johnny@johnny.c    = false

edited Mar 31 '22 at 08:33

answered Mar 31 '22 at 08:30

PandaCórdoba

156
8

thanks for the answer but your code is the same as me – Monster Eat Mar 31 '22 at 08:33
can you add the code, so that we can see and understand it better – PandaCórdoba Mar 31 '22 at 08:34
I found the problem, my regex is slight different than yours, and when I use your regex it solved the problem. Thanks – Monster Eat Mar 31 '22 at 08:37

score 0 · Answer 2 · answered Mar 31 '22 at 09:56

Try the following code you can import this class in to the page you want u can just validate any String like following

extension EmailValidator on String {
     bool isValidEmail() {
        return RegExp(
           r'^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)| 
    (\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a- 
      zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$')
      .hasMatch(this);
                     }
               }

eg:if(anyString.isValidEmail()) { print("Valid")}

how can you validate an email as invalid when the email don't have the .com in flutter?

2 Answers2