function duplicateRemovalArr (arr, key) {
    let hash = {};
    let result = arr.reduce((total, currentValue) => {
        if (!hash[currentValue[key]]) {
            hash[currentValue[key]]= true;
            total.push(currentValue);
        }
        return total;
    },[]);
    return result;
}

示例如下：

let arr = [{id:1,name:'小明'},{id:1,name:'小南'},{id:3,name:'小明'}]
根据对象属性name去重
duplicateRemovalArr (arr,'name')

执行结果如下：

执行结果.png