Simple GraphQL client

client.ts

export default function GQLClient(params) {
  return {
    async request(query, variables) {
      const token = params.token ?? (await getToken(params.client))
      const res = await fetch(params.url, {
        headers: {
          "Content-Type": "application/json",
          ...(token ? { Authorization: `Bearer ${token}` } : undefined),
        },
        method: "POST",
        body: JSON.stringify({ query, variables }),
      })

      const json = await res.json()
      if (json.errors) {
        params.onError({
          errors: json.errors,
          message: json.errors.map((e) => e.message).join(", "),
          query,
          variables,
        })
        return
      }

      return json.data
    },
  }
}