数组对象出去重

 let arr1 = [
      { key: 1, lable: 11, select: false },
      { key: 2, lable: 22, select: false }
    ];
    let arr2 = [{ key: 2, lable: 22, select: false }];

    function diffrence(a, b) {
      a = a.map(JSON.stringify);
      b = b.map(JSON.stringify);
      return a
        .concat(b)
        .filter(v => !a.includes(v) || !b.includes(v))
        .map(JSON.parse);
    }
    diffrence(arr1, arr2);