// Formats MM/DD/YYYY to YYYYMMDD without providing for single digit MM or DD variants
function formatDateStrict(dateString){
    if(typeof dateString === 'string'){
        const components = dateString.match(/^(\d{2})\/(\d{2})\/(\d{4})$/);

        if(components === null){
            throw new Error('Expected date string in format MM/DD/YYYY');
        }
        else {
            // Creating extra variables for no real reason apart from readability
            const
                month = components[1],
                day = components[2],
                year = components[3];

            return `${year}${month}${day}`;
        }
    }
    else {
        throw new TypeError('A date string is expected');
    }
}