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flutter text form field email validation

By Lazy LlamaLazy Llama on Dec 24, 2020
String validateEmail(String value) {
    Pattern pattern =
        r"^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]"
        r"{0,253}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]"
        r"{0,253}[a-zA-Z0-9])?)*$";
    RegExp regex = new RegExp(pattern);
    if (!regex.hasMatch(value) || value == null)
      return 'Enter a valid email address';
    else
      return null;
  }

Source: stackoverflow.com

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