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  • Authors: @gaspard @vbfox

As mentioned in React documentation, a stateless component can return false for empty content. Currently StatelessComponent is defined as:

interface StatelessComponent<P = {}> {
        (props: P & { children?: ReactNode }, context?: any): ReactElement<any> | null;

whereas Component has

class Component<P, S> {
        constructor(props?: P, context?: any);
        // ...snip...
        render(): JSX.Element | null | false;

Shouldn't these types be the same (including eliminating the ReactElement vs JSX.Element difference)? And to avoid future such issues (#14064, this one) it should probably be a named type, e.g. RenderResult.

A search for | null also comes up with ComponentSpec.render which probably should also have the same result type.