SuperJSON middleware for Hono

hono-superjson-middleware.ts

import type { MiddlewareHandler } from "hono"
import superjson from "superjson"

export const superjsonMiddleware = (): MiddlewareHandler => {
  return async (c, next) => {
    if (c.req.header("x-superjson") === "true") {
      const json = c.json.bind(c)
      c.json = (object: any, ...args: any[]) => {
        return json(superjson.serialize(object), ...args)
      }
    }
  
    return next()
  }  
}