我想在javascript中从json对象中搜索一个字符串。

function searchInJSON(jsonObj, searchString) {
  for (var key in jsonObj) {
    if (typeof jsonObj[key] === 'string' && jsonObj[key].includes(searchString)) {
      console.log('Found at key:', key);
    } else if (typeof jsonObj[key] === 'object') {
      searchInJSON(jsonObj[key], searchString);
    }
  }
}

var jsonString = '{"name": "John", "age": 30, "address": {"street": "123 Main St", "city": "New York"}}';
var jsonObject = JSON.parse(jsonString);

searchInJSON(jsonObject, 'New York');