// @flow const nameRegex = /^([A-z0-9.\-_@]|[^ ]([A-z0-9.\-_@ ]*[A-z0-9.\-_@]|[^\s])?)$/; export const isNameValid = (name: string) => { return nameRegex.test(name); }; const mailRegex = /^[A-z0-9][\w.-]*@[A-z0-9][\w\-.]*\.[A-z0-9][A-z0-9-]+$/; export const isMailValid = (mail: string) => { return mailRegex.test(mail); }; export const isNumberValid = (number: string) => { return !isNaN(number); };