//去重复
    unique(arr1) {
      const res = new Map();
      return arr1.filter((a) => !res.has(a.level) && res.set(a.level, 1))
    },
    uniqueFun(arr, type) {
      const res = new Map();
      return arr.filter((a) => !res.has(a[type]) && res.set(a[type], 1));
    }

数组属性去重