createPortal cannot have a nullable target #204
Description
I've run into rare situations where createPortal used on two lines is using null target values. https://github.com/ryanseddon/react-frame-component/blob/master/src/Frame.jsx#L118
This, in turn, creates a "Target container is not a DOM element." exception.
This was reported in the past here: #131
Regardless of the related bugs from my sentry report, at the bare minimum, the argument should be checked if it's actually null or not. This is more easily noticeable in TypeScript.