Better use js native utilities or implement v8-isolation compatible colution

[tshemsedinov]

1. JavaScript has native tools to do that: Array.isArray, Buffer.isBuffer
2. This will not work for v8 sandboxes
3. But you can't use it in all cases, better solution is to check instance.constructor.name, this will work also for isolated contexts in v8
4. Utility class is well-known antipattern, see Clean code

https://github.com/diia-open-source/be-pkg-utils/blob/e969374fb769e59ab6bbdb709caeba0199e14a8c/src/typeUtils.ts#L1-L13

[vird]

Problem with value.type === 'Buffer' Than it will also say that it's valid buffer if it's not a buffer, but serialized buffer (or better say under-deserialized) e.g. this way https://nodejs.org/api/buffer.html

const copy = JSON.parse(json, (key, value) => {
  return value && value.type === 'Buffer' ?
    Buffer.from(value) :
    value;
});