如何使用JavaScript检查字符串是否在对象中包含某些关键字

const obj = {
  key1: 'This is a sample string',
  key2: 'Another string example',
  key3: 'One more example'
};

const keyword = 'sample';

if (obj.key1.includes(keyword)) {
  console.log('The keyword is present in key1');
} else {
  console.log('The keyword is not present in key1');
}

const obj = {
  key1: 'This is a sample string',
  key2: 'Another string example',
  key3: 'One more example'
};

const keyword = /sample/;

if (keyword.test(obj.key1)) {
  console.log('The keyword is present in key1');
} else {
  console.log('The keyword is not present in key1');
}

const obj = {
  key1: 'This is a sample string',
  key2: 'Another string example',
  key3: 'One more example'
};

const keyword = 'sample';

if (obj.key1.indexOf(keyword) !== -1) {
  console.log('The keyword is present in key1');
} else {
  console.log('The keyword is not present in key1');
}