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);