从javascript中的嵌套对象中获取最深层的子级

function getDeepestChild(obj) {
  let deepestChild = null;

  function traverse(obj, depth) {
    if (typeof obj !== 'object' || obj === null) {
      return;
    }

    for (let key in obj) {
      if (typeof obj[key] === 'object' && obj[key] !== null) {
        traverse(obj[key], depth + 1);
      } else {
        if (deepestChild === null || depth > deepestChild.depth) {
          deepestChild = {
            key: key,
            value: obj[key],
            depth: depth
          };
        }
      }
    }
  }

  traverse(obj, 0);

  return deepestChild;
}

const obj = {
  a: {
    b: {
      c: 1
    },
    d: {
      e: {
        f: 2
      }
    }
  },
  g: {
    h: 3
  }
};

const deepestChild = getDeepestChild(obj);
console.log(deepestChild); // 输出 { key: 'f', value: 2, depth: 3 }