deepReplace

const deepReplace = (data, targetValue, newValue) => {
  if (Array.isArray(data)) {
    return data.map(item => deepReplace(item, targetValue, newValue));
  } else if (typeof data === 'object' && data !== null) {
    return Object.fromEntries(
      Object.entries(data).map(([key, value]) => [key, deepReplace(value, targetValue, newValue)])
    );
  } else {
    return data === targetValue ? newValue : data;
  }
};

// 사용 예시
const obj = {
  a: 1,
  b: [2, { c: 1, d: [1, 2, 3] }],
  e: { f: 1, g: { h: 1 } }
};

const result = deepReplace(obj, 1, 99);
console.log(result);
/*
{
  a: 99,
  b: [2, { c: 99, d: [99, 2, 3] }],
  e: { f: 99, g: { h: 99 } }
}
*/