Name for the recid field in the records array. If you server returns records structure that does not have recid, you can defined another unique field instead of it. This property should be set during object creation: let grid = new w2grid({ name : 'grid', url : '/server/side/url', recid : 'personId', columns : [ { field: 'personId', text: 'ID', size: '50px' }, { field: 'lname', text: 'Last Name', size: '30%' }, { field: 'fname', text: 'First Name', size: '30%' }, { field: 'email', text: 'Email', size: '40%' }, { field: 'sdate', text: 'Start Date', size: '120px' }, { field: 'edate', text: 'End Date', size: '120px' } ] });