var arr = [{_id: "58e21249", name: "test2", status: "offline"},
{_id: "58e1249", name: "test3", status: "online"},
{_id: "58qwe49", name: "test21", status: "offline"},
{_id: "58ed49", name: "test212", status: "online"},
{_id: "58ee49", name: "test23", status: "offline"},
{_id: "58xe49", name: "test12", status: "online"},
{_id: "5849", name: "test2323", status: "busy"},
{_id: "58er49", name: "test2121", status: "busy"}];
var statusOrder = ["online", "busy", "offline"];
arr = arr.sort(function(a, b) {
return statusOrder.indexOf(a.status) - statusOrder.indexOf(b.status);
});
console.log(arr);