import Switch, { Case, Default } from 'react-switch-case';

const componentShow = 'component1';
 
<Switch condition={componentShow || (value) => compare(value)}>
    <Case value="component1">
        <span>Component 1</span>
    </Case>
    <Case value="component2">
        <span>Component 2</span>
    </Case>
    <Default>
        <span>Nothing!</span>
    </Default>
</Switch>