beers

    if(beers < 1)
        return null;
    console.log('[js] bottles (' + beers +')');
    let res = "";

    for(var i = beers; i > 1; i--) {
        res = res.concat(`${i} bottles of beer on the wall, ${i}\
bottles of beer.<br/>Take one down and pass it around, ${i}\
bottles of beer on the wall.<br/><br/>`);
    }
    res = res.concat(`1 bottle of beer on the wall, 1\
bottle of beer.<br/>Take one down and pass it around, 1\
bottle of beer on the wall.<br/><br/>\
No more bottles of beer on the wall, no more bottles of beer.<br/>\
Go to the store and buy some more, ${beers} \
bottles of beer on the wall.`);
    return res;