React showing 0 instead of nothing with short-circuit (&&) conditional component

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Since your condition is falsy and so doesn’t return the second argument (<GeneralLoader />), it will return profileTypesLoading, which is a number, so react will render it because React skips rendering for anything that is typeof boolean or undefined and will render anything that is typeof string or number:

To make it safe, you can either use a ternary expression {condition ? <Component /> : null} or boolean cast your condition like {!!condition && <Component />}

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