create-merged-request ·

Merge scattered requests into one, distribute corresponding result to requestor.

Install

npm i create-merged-request rxjs # Please note that rxjs is peer dependency of it

Usage

For example if you have tons of user query in different components and you want to combine theme into one.

import { createMergedRequest } from 'create-merged-request'

// `string` is user id
// `User[]` is the response data type that `createRequest` resolves
// `User` is the data type that `createResponse` returns
const mergedRequest = createMergedRequest<string, User[], User>({
  thresholdMs: 0, // time threshold to merged request into one request
  createRequest(ids) {
    return fetchUsers(ids) // `fetchUsers` type: (ids: string[]) => Promise<User[]>
  },
  createResponse(id, users) {
    return users.find((user) => user.id === id)! // return type: User
  }
})

// `fetchUsers` will be called only once
mergedRequest(userId1).then((user) => console.log(user))
mergedRequest(userId2).then((user) => console.log(user))
mergedRequest(userId3).then((user) => console.log(user))