Do not render "0" when parent height and width are both 0.

[stonebk]

The following will render "0":

const Foo = Dimensions()(() => <div />);
const Bar = () => {
    return <div style={{ width: 0, height: 0 }}><Foo /></div>;
};

[mariomc]

This way you are not creating the ComposedComponent if the dimensions are 0. This may lead to some confusion.
You could solve the printing of '0' by casting the above statement to a boolean like this !!(containerWidth || containerHeight)

[stonebk]

ComposedComponent is already not being created. {(0 || 0) && <ComposedComponent>} becomes {0} which will render "0" as text. {(0 || 0) ? <ComposedComponent> : null} becomes {null} which will render nothing.

[mariomc]

That is indeed true and a derp on my part. Disregard my comments ;)

[gabegorelick]

Any plans to merge this?

[yocontra]

Yeah, this is a pretty weird bug - would be great to have this merged.