无法确定字符串是否包含在angular2+中的Json密钥中

const json = { key1: 'value1', key2: 'value2', key3: 'value3' };
const searchKey = 'key2';

const keys = Object.keys(json);
const isKeyPresent = keys.includes(searchKey);

console.log(`Is ${searchKey} present in Json keys: ${isKeyPresent}`);

Is key2 present in Json keys: true

const json = { key1: 'value1', key2: 'value2', key3: 'value3' };
const searchKey = 'key2';

let isKeyPresent = false;

for (const key in json) {
  if (key === searchKey) {
    isKeyPresent = true;
    break;
  }
}

console.log(`Is ${searchKey} present in Json keys: ${isKeyPresent}`);

Is key2 present in Json keys: true