JSFiddle - React, Tailwind, and code Playground

HTML

<form method="post" name="registraion" action="/public/registration.php">
		<label>
      <!--От 3 до 20 русских или латинских символов-->
			Name <input type="text" name="name" pattern="[A-Za-zА-Яа-яЁё]{3, 20}" required>
		</label>
		<input type="submit" name="input" value="input">
	</form>