['US', 'USA', 'United States of America']

USUSAUnited States of America

TypeError: props.modalCountry.alt_spellings is undefined

const Component = ({ arr = [] }) => (
    <div>
        {arr && arr.join()}
    </div>
);

const Component = ({ arr = [] }) => arr ? (
    <div>
        {arr.join()}
    </div>
) : null;

const Component = ({ arr = [] }) => (
    <div>
        {arr.join()}
    </div>
);