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
    };

    if ($.inArray(newUser, filterList) == -1) {
        filterList.push(newUser);
    }
});
alert(filterList);