React Server

Usage

npm add react-server-action
yarn add react-server-action
pnpm add react-server-action

import { validate, reactServerAction } from 'react-server-action'

const isServerLayer = true
const result = validate('path/to/file', isServerLayer)
if (!result.error) {
  const code = await reactServerAction('path/to/file', '__prefix__', isServerLayer)
  console.log(code)
}

Collection of React Server tools

RSC rules

Valid RSC

'use server'
'use client'
// ❌

'use server'
// ✅

'use client'
// ✅

'use client'
export const foo = async () => {
  'use server'
  return 'rsc'
}
// ❌

export const foo = async () => {
  'use server'
  return 'rsc'
}
// ✅

Register RSC

Option 1: export `PREFIX+name` in the same file

import { registerServerReference } from 'react-server-dom-webpack/server'

export const foo = async () => {
  'use server'
  return 'rsc'
}

export const __prefix__foo = registerServerReference(foo, 'file_id', 'foo')

Option 2: register in local map

import { registerServerReference } from 'react-server-dom-webpack/server'

export const rscMap = new Map()

function register (
  fn: Function,
  file: string,
  name: string,
) {
  registerServerReference(fn, file, name)
  rscMap.set(id, fn)
  return fn
}

export const foo = async () => {
  'use server'
  return 'rsc'
}

register(foo, 'file_id', 'foo')

Transform RSC

Case 1: server action file

'use server'

export async function foo () {
  return 'rsc'
}

export function not_rsc () {
  return 'not_rsc'
}

⬇️

'use server'
import { registerServerReference } from 'react-server-dom-webpack/server'

export async function foo () {
  return 'rsc'
}

export function not_rsc () {
  return 'not_rsc'
}

export const __prefix__foo = registerServerReference(foo, 'file_id', 'foo')

Case 2: non-exported server action

async function wrapFn (...args: any[]) {
  'use server'
}

export const App = () => {
  wrapFn()
  return <div>App</div>
}

⬇️

import { registerServerReference } from 'react-server-dom-webpack/server'

async function wrapFn (...args: any[]) {
  'use server'
}

export const App = () => {
  wrapFn()
  return <div>App</div>
}

export const __prefix__wrapFn = registerServerReference(wrapFn, 'file_id', 'wrapFn')

Note that all server actions should be exported, otherwise server runtime cannot access them.

Case 3: server action in nested function

import { Component } from '@/components'

export const App = (props) => {
  const foo = async (input: string) => {
    'use server'
    return JSON.stringify(props) + input;
  }
  return <Component action={foo} />
}

⬇️

import { registerServerReference } from 'react-server-dom-webpack/server'
import { Component } from '@/components'

export const App = (props) => {
  const foo = __prefix__1.bind(null, [props])
  return <Component action={foo} />
}

export const __prefix__1 = registerServerReference(async (bound, input) => {
  'use server'
  const [props] = bound;
  return JSON.stringify(props) + input;
}, 'file_id', '__prefix__1')

You should save the context of the function correctly, otherwise the function will not work as expected.

Case 4: server action in jsx

export const App = (props) => {
  return <div onClick={async () => {
    'use server'
    console.log(props)
  }} />
}

⬇️

import { registerServerReference } from 'react-server-dom-webpack/server'

export const App = (props) => {
  return <div onClick={__prefix__action_1.bind(null, [props])} />
}

export const __prefix__action_1 = registerServerReference(async (bound) => {
  'use server'
  const [props] = bound
  console.log(props)
}, 'file_id', '__prefix__action_1')

LICENSE

MIT

himself65/react-server