title: SwiftUI email validation
body: <p>How is email validation done with swiftUI? </p>
  
  <pre><code>TextField("Please enter your e-mail", text: self.$email)
      .modifier(ClearButton(text: $email))
      .font(.headline)
      .padding(10)
      .foregroundColor(.black)
      .background(Color.white)
      .frame(width: 300, height: 40, alignment: .center)
      .cornerRadius(20)
  </code></pre>