如何过滤基于大小写文本匹配的动态JSON对象嵌套数组

function filterJSON(json, targetText) {
  if (typeof json !== 'object') {
    return null;
  }

  if (Array.isArray(json)) {
    const filteredArray = [];
    for (let i = 0; i < json.length; i++) {
      const filteredItem = filterJSON(json[i], targetText);
      if (filteredItem !== null) {
        filteredArray.push(filteredItem);
      }
    }
    return filteredArray;
  }

  const filteredObject = {};
  for (const key in json) {
    const value = json[key];
    if (typeof value === 'string' && value.toLowerCase().includes(targetText.toLowerCase())) {
      filteredObject[key] = value;
    } else if (typeof value === 'object') {
      const filteredValue = filterJSON(value, targetText);
      if (filteredValue !== null) {
        filteredObject[key] = filteredValue;
      }
    }
  }
  return Object.keys(filteredObject).length > 0 ? filteredObject : null;
}

// 示例用法
const json = {
  "name": "John",
  "age": 30,
  "hobbies": ["reading", "coding", "swimming"],
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
};

const filteredJSON = filterJSON(json, "coding");
console.log(filteredJSON);