如何检查对象是否在JavaScript中有密钥？

const obj = {
  key1: 'value1',
  key2: 'value2'
};

if (obj.hasOwnProperty('key1')) {
  console.log('对象包含key1键');
} else {
  console.log('对象不包含key1键');
}

const obj = {
  key1: 'value1',
  key2: 'value2'
};

if ('key1' in obj) {
  console.log('对象包含key1键');
} else {
  console.log('对象不包含key1键');
}