data =[
{'name':'Fred','status':'Available','age':'15','country':'Canada'},
{'name':'George','status':'Unavailable','age':'17','country':'Russia'},
{'name':'Bill','status':'Unavailable','age':'61','country':'USA'}
];
data.map((rowData) => { return "<tr>\n" + Object.values(rowData).map(item=> {return " <td>" + item + "</td>\n"}).join(''); + "</tr>\n"}).join('');
Better solution, remove commas with join.