How to check if subject is ZodObject?

At the moment I am doing:

const foo = z.object({
  name: z.string(),
});

console.log(foo?._def?.typeName === 'ZodObject');

Though this relies on accessing an internal property.

For context, it is needed to make https://github.com/gajus/slonik/issues/364 work.

[scotttrinh]

I wonder if this is a case of the remix library having a different copy of Zod installed which would cause instanceof checks to fail.

[miguelespinoza]

Here’s some context:

// The zod object I'm creating
const RequestParamSchema = z.object({
  a: z.string().min(1),
  b: z.string().min(1),
  c: z.string().min(1),
  d: z.string().min(1),
});

// Using remix-params-helper to handle the validationg
const params = getParams(event.body, RequestParamSchema);

Here’s the line in question: https://github.com/kiliman/remix-params-helper/blob/main/src/helper.ts#L28

After some digging, this is an esbuild configuration issue. For anyone bumping into this, this is what my serverless.yml config file looks like:

esbuild:
    external:
       - zod
       - remix-params-helper