Write a function to convert json string to js object in javascript without using JSON.parse

parseJSON.ts

function parseJSON(jsonString: string): Record<string, any> {
  const result: Record<string, any> = {};
  jsonString = jsonString.substring(1, jsonString.length - 1);
  const pairs = jsonString.split(',');

  for (const pair of pairs) {
    const keyValue = pair.split(':');
    let key = keyValue[0].trim();
    let value = keyValue[1].trim();
    key = key.substring(1, key.length - 1);
    value = value.substring(1, value.length - 1);
    result[key as string] = value;
  }

  return result;
}

console.log(parseJSON('{"name": "John", "age": "25"}'));