JSFiddle - React, Tailwind, and code Playground

JavaScript

var list = [{
    ID: 1,
    name: "Chris",
    phone: "111",
    cusID: 1
}, {
    ID: 2,
    name: "Alex",
    phone: "222",
    cusID: 2
}, {
    ID: 3,
    name: "Jim",
    phone: "333",
    cusID: 3
}, {
    ID: 4,
    name: "Chris",
    phone: "111",
    cusID: 1
}];

var filterList = [];

$.each(list, function (i, item) {
   
    var newUser = {
        name: item.name,
        cusID: item.cusID
    };
      var zUser = newUser.name+","+newUser.cusID;
   
    if ($.inArray(zUser, filterList) == -1) {
        filterList.push(zUser);
    }
});
 alert(filterList);