perf: removes undefined props from rsc requests (#9195)

This is in effort to reduce overall HTML bloat, undefined props still go
through the request as `$undefined` and must be explicitly omitted.

packages/payload/src/collections/config/client.ts

@@ -20,7 +20,7 @@ export type ServerOnlyCollectionProperties = keyof Pick<
 
 export type ServerOnlyCollectionAdminProperties = keyof Pick<
   SanitizedCollectionConfig['admin'],
-  'baseListFilter' | 'hidden'
+  'baseListFilter' | 'components' | 'hidden'
 >
 
 export type ServerOnlyUploadProperties = keyof Pick<
@@ -34,7 +34,6 @@ export type ServerOnlyUploadProperties = keyof Pick<
 
 export type ClientCollectionConfig = {
   admin: {
-    components: null
     description?: StaticDescription
     livePreview?: Omit<LivePreviewConfig, ServerOnlyLivePreviewProperties>
     preview?: boolean
@@ -76,6 +75,7 @@ const serverOnlyUploadProperties: Partial<ServerOnlyUploadProperties>[] = [
 const serverOnlyCollectionAdminProperties: Partial<ServerOnlyCollectionAdminProperties>[] = [
   'hidden',
   'baseListFilter',
+  'components',
   // 'preview' is handled separately
   // `livePreview` is handled separately
 ]
@@ -89,7 +89,10 @@ export const createClientCollectionConfig = ({
   defaultIDType: Payload['config']['db']['defaultIDType']
   i18n: I18nClient
 }): ClientCollectionConfig => {
-  const clientCollection = deepCopyObjectSimple(collection) as unknown as ClientCollectionConfig
+  const clientCollection = deepCopyObjectSimple(
+    collection,
+    true,
+  ) as unknown as ClientCollectionConfig
 
   clientCollection.fields = createClientFields({
     clientFields: clientCollection?.fields || [],
@@ -150,8 +153,6 @@ export const createClientCollectionConfig = ({
     clientCollection.admin.preview = true
   }
 
-  clientCollection.admin.components = null
-
   let description = undefined
 
   if (collection.admin?.description) {
@@ -165,7 +166,9 @@ export const createClientCollectionConfig = ({
     }
   }
 
+  if (description) {
     clientCollection.admin.description = description
+  }
 
   if (
     'livePreview' in clientCollection.admin &&

packages/payload/src/config/client.ts

@@ -79,7 +79,7 @@ export const createClientConfig = ({
   i18n: I18nClient
 }): ClientConfig => {
   // We can use deepCopySimple here, as the clientConfig should be JSON serializable anyways, since it will be sent from server => client
-  const clientConfig = deepCopyObjectSimple(config) as unknown as ClientConfig
+  const clientConfig = deepCopyObjectSimple(config, true) as unknown as ClientConfig
 
   for (const key of serverOnlyConfigProperties) {
     if (key in clientConfig) {

packages/payload/src/fields/config/client.ts

@@ -18,6 +18,7 @@ import type { Payload } from '../../types/index.js'
 import { MissingEditorProp } from '../../errors/MissingEditorProp.js'
 import { fieldAffectsData } from '../../fields/config/types.js'
 import { flattenTopLevelFields } from '../../index.js'
+import { removeUndefined } from '../../utilities/removeUndefined.js'
 
 // Should not be used - ClientField should be used instead. This is why we don't export ClientField, we don't want people
 // to accidentally use it instead of ClientField and get confused
@@ -99,8 +100,9 @@ export const createClientField = ({
     clientField.admin.style = {
       ...clientField.admin.style,
       '--field-width': clientField.admin.width,
-      width: undefined, // avoid needlessly adding this to the element's style attribute
     }
+
+    delete clientField.admin.style.width // avoid needlessly adding this to the element's style attribute
   } else {
     if (!(clientField.admin.style instanceof Object)) {
       clientField.admin.style = {}
@@ -137,19 +139,24 @@ export const createClientField = ({
       if (incomingField.blocks?.length) {
         for (let i = 0; i < incomingField.blocks.length; i++) {
           const block = incomingField.blocks[i]
-          const clientBlock: ClientBlock = {
+
+          // prevent $undefined from being passed through the rsc requests
+          const clientBlock = removeUndefined<ClientBlock>({
             slug: block.slug,
-            admin: {
-              components: {},
-              custom: block.admin?.custom,
-            },
             fields: field.blocks?.[i]?.fields || [],
             imageAltText: block.imageAltText,
             imageURL: block.imageURL,
+          }) satisfies ClientBlock
+
+          if (block.admin?.custom) {
+            clientBlock.admin = {
+              custom: block.admin.custom,
+            }
           }
 
           if (block.labels) {
             clientBlock.labels = {} as unknown as LabelsClient
+
             if (block.labels.singular) {
               if (typeof block.labels.singular === 'function') {
                 clientBlock.labels.singular = block.labels.singular({ t: i18n.t })
@@ -184,6 +191,7 @@ export const createClientField = ({
 
     case 'radio':
 
+    // eslint-disable-next-line no-fallthrough
     case 'select': {
       const field = clientField as RadioFieldClient | SelectFieldClient
 
@@ -206,7 +214,6 @@ export const createClientField = ({
 
       break
     }
-
     case 'richText': {
       if (!incomingField?.editor) {
         throw new MissingEditorProp(incomingField) // while we allow disabling editor functionality, you should not have any richText fields defined if you do not have an editor
@@ -218,6 +225,7 @@ export const createClientField = ({
 
       break
     }
+
     case 'tabs': {
       const field = clientField as unknown as TabsFieldClient
 
@@ -325,7 +333,6 @@ export const createClientFields = ({
       },
       hidden: true,
       label: 'ID',
-      localized: undefined,
     })
   }
 

packages/payload/src/globals/config/client.ts

@@ -49,7 +49,7 @@ export const createClientGlobalConfig = ({
   global: SanitizedConfig['globals'][0]
   i18n: I18nClient
 }): ClientGlobalConfig => {
-  const clientGlobal = deepCopyObjectSimple(global) as unknown as ClientGlobalConfig
+  const clientGlobal = deepCopyObjectSimple(global, true) as unknown as ClientGlobalConfig
 
   clientGlobal.fields = createClientFields({
     clientFields: clientGlobal?.fields || [],

packages/payload/src/utilities/deepCopyObject.ts

@@ -98,12 +98,12 @@ Benchmark: https://github.com/AlessioGr/fastest-deep-clone-json/blob/main/test/b
  *              `Set`, `Buffer`, ... are not allowed.
  * @returns The cloned JSON value.
  */
-export function deepCopyObjectSimple<T extends JsonValue>(value: T): T {
+export function deepCopyObjectSimple<T extends JsonValue>(value: T, filterUndefined = false): T {
   if (typeof value !== 'object' || value === null) {
     return value
   } else if (Array.isArray(value)) {
     return value.map((e) =>
-      typeof e !== 'object' || e === null ? e : deepCopyObjectSimple(e),
+      typeof e !== 'object' || e === null ? e : deepCopyObjectSimple(e, filterUndefined),
     ) as T
   } else {
     if (value instanceof Date) {
@@ -112,7 +112,13 @@ export function deepCopyObjectSimple<T extends JsonValue>(value: T): T {
     const ret: { [key: string]: T } = {}
     for (const k in value) {
       const v = value[k]
-      ret[k] = typeof v !== 'object' || v === null ? v : (deepCopyObjectSimple(v as T) as any)
+      if (filterUndefined && v === undefined) {
+        continue
+      }
+      ret[k] =
+        typeof v !== 'object' || v === null
+          ? v
+          : (deepCopyObjectSimple(v as T, filterUndefined) as any)
     }
     return ret as unknown as T
   }

packages/payload/src/utilities/removeUndefined.ts

@@ -0,0 +1,3 @@
+export function removeUndefined<T extends object>(obj: T): T {
+  return Object.fromEntries(Object.entries(obj).filter(([, value]) => value !== undefined)) as T
+}

packages/ui/src/elements/RenderServerComponent/index.tsx

@@ -7,6 +7,8 @@ import {
 } from 'payload/shared'
 import React from 'react'
 
+import { removeUndefined } from '../../utilities/removeUndefined.js'
+
 export const getFromImportMap = <TOutput,>(args: {
   importMap: ImportMap
   PayloadComponent: PayloadComponent
@@ -66,7 +68,13 @@ export const RenderServerComponent: React.FC<{
   if (typeof Component === 'function') {
     const isRSC = isReactServerComponentOrFunction(Component)
 
-    return <Component {...clientProps} {...(isRSC ? serverProps : {})} />
+    // prevent $undefined from being passed through the rsc requests
+    const sanitizedProps = removeUndefined({
+      ...clientProps,
+      ...(isRSC ? serverProps : {}),
+    })
+
+    return <Component {...sanitizedProps} />
   }
 
   if (typeof Component === 'string' || isPlainObject(Component)) {
@@ -79,18 +87,17 @@ export const RenderServerComponent: React.FC<{
     if (ResolvedComponent) {
       const isRSC = isReactServerComponentOrFunction(ResolvedComponent)
 
-      return (
-        <ResolvedComponent
-          {...clientProps}
-          {...(isRSC ? serverProps : {})}
-          {...(isRSC && typeof Component === 'object' && Component?.serverProps
+      // prevent $undefined from being passed through rsc requests
+      const sanitizedProps = removeUndefined({
+        ...clientProps,
+        ...(isRSC ? serverProps : {}),
+        ...(isRSC && typeof Component === 'object' && Component?.serverProps
           ? Component.serverProps
-            : {})}
-          {...(typeof Component === 'object' && Component?.clientProps
-            ? Component.clientProps
-            : {})}
-        />
-      )
+          : {}),
+        ...(typeof Component === 'object' && Component?.clientProps ? Component.clientProps : {}),
+      })
+
+      return <ResolvedComponent {...sanitizedProps} />
     }
   }
 

packages/ui/src/utilities/removeUndefined.ts

@@ -0,0 +1,3 @@
+export function removeUndefined<T extends object>(obj: T): T {
+  return Object.fromEntries(Object.entries(obj).filter(([, value]) => value !== undefined)) as T
+}