计算嵌套Javascript对象的重复属性值

function countDuplicateValues(obj) {
  let count = {};
  
  function traverse(obj) {
    for (let key in obj) {
      if (typeof obj[key] === 'object' && obj[key] !== null) {
        traverse(obj[key]);
      } else {
        if (count.hasOwnProperty(obj[key])) {
          count[obj[key]]++;
        } else {
          count[obj[key]] = 1;
        }
      }
    }
  }
  
  traverse(obj);
  
  return count;
}

// 示例对象
const obj = {
  a: 1,
  b: {
    c: 2,
    d: {
      e: 1,
      f: 3
    }
  },
  g: {
    h: 2,
    i: 1
  }
};

// 调用函数计算重复属性值
const result = countDuplicateValues(obj);

console.log(result);

{
  "1": 2,
  "2": 2,
  "3": 1
}