Javascript middleware pattern using promises, simple but powerfull

middleware.js

async function wrap(fn, thisCtx, ...ctx) {
  return await new Promise(async (next, end) => {
    next(await fn.call(thisCtx, ...ctx, next, end))
  })
}

export class Middleware {
  constructor(...middlewares) {
    this.middlewares = middlewares
  }

  use(...middlewares) {
    this.middlewares = [...this.middlewares, ...middlewares]
    return this
  }

  async exec(...context) {
    const thisCtx = {}

    for (const fn of this.middlewares) {
      try {
        await wrap(fn, thisCtx, ...context)
      } catch (err) {
        break
      }
    }

    return context
  }
}