Relay uses error messages to communicate to the user when an input value requires an action. For those interested in the code, it is available on Github
Invalid widget. X,y, and z is required.
<.error with_icon> Invalid widget. X,y, and z is required. </.error>
Invalid widget. X,y, and z is required.
<.error > Invalid widget. X,y, and z is required. </.error>
field provided error
<.error field={%FormField{id: "123", name: "some_name", errors: [{"field provided error", "1"}], field: "field", form: nil, value: nil}} />