对象中包含集合js如何处理

let obj = {
  name: "Example",
  tags: ["important", "urgent"],
  details: {
    id: 123,
    description: "This is an example object."
  }
};

obj.tags.forEach(function(tag) {
  console.log(tag);
});

for (let key in obj.details) {
  if (obj.details.hasOwnProperty(key)) {
    console.log(key + ": " + obj.details[key]);
  }
}

let index = obj.tags.indexOf("important");
console.log(index); // 输出: 0

console.log(obj.details.description); // 输出: This is an example object.

obj.tags[0] = "high priority";
console.log(obj.tags); // 输出: ["high priority", "urgent"]

obj.details.description = "Updated description.";
console.log(obj.details.description); // 输出: Updated description.

obj.tags.splice(1, 1); // 删除索引为1的元素
console.log(obj.tags); // 输出: ["high priority"]

delete obj.details.id;
console.log(obj.details); // 输出: { description: "Updated description." }

if (!obj.tags || !Array.isArray(obj.tags)) {
  obj.tags = []; // 设置默认空数组
}