SOURCE

let staff = [{ id: "001", name: "张三" }, { id: "002", name: "李四" }, { id: "002", name: "李四" }];
let staffObject = {};
let result = [];

for (let i = 0; i < staff.length; i++) {
    staffObject[JSON.stringify(staff[i])] = true;
}
console.log(staffObject);
let keyItems = Object.keys(staffObject);
console.log(keyItems);

for (let j = 0; j < keyItems.length; j++) {
    result.push(JSON.parse(keyItems[j]));
}
console.log(result);