js json 遍历对象

const obj = { a: 1, b: 2, c: 3 };
for (let key in obj) {
  if (obj.hasOwnProperty(key)) { // 确保不是继承来的属性
    console.log(key, obj[key]);
  }
}

const obj = { a: 1, b: 2, c: 3 };
Object.keys(obj).forEach(key => {
  console.log(key, obj[key]);
});

const obj = { a: 1, b: 2, c: 3 };
Object.entries(obj).forEach(([key, value]) => {
  console.log(key, value);
});

const obj = { a: 1, b: 2, c: 3 };
for (const [key, value] of Object.entries(obj)) {
  console.log(key, value);
}

for (let key in obj) {
  if (obj.hasOwnProperty(key)) {
    // 处理obj自身的属性
  }
}

function traverseObject(obj) {
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      const value = obj[key];
      if (typeof value === 'object' && value !== null) {
        traverseObject(value); // 递归遍历
      } else {
        console.log(key, value);
      }
    }
  }
}

const nestedObj = { a: 1, b: { c: 2, d: { e: 3 } } };
traverseObject(nestedObj);