, do not pass children.',\n         );\n-        if (Array.isArray(children)) {\n+        if (isArray(children)) {\n           invariant(\n             children.length <= 1,\n             '<textarea> can only have at most one child.',\ndiff --git a\/packages\/react-dom\/src\/server\/ReactDOMServerFormatConfig.js b\/packages\/react-dom\/src\/server\/ReactDOMServerFormatConfig.js\nindex 2988e9a588..45cd0fecb5 100644\n--- a\/packages\/react-dom\/src\/server\/ReactDOMServerFormatConfig.js\n+++ b\/packages\/react-dom\/src\/server\/ReactDOMServerFormatConfig.js\n@@ -46,8 +46,7 @@ import hyphenateStyleName from '..\/shared\/hyphenateStyleName';\n import invariant from 'shared\/invariant';\n import hasOwnProperty from 'shared\/hasOwnProperty';\n import sanitizeURL from '..\/shared\/sanitizeURL';\n-\n-const isArray = Array.isArray;\n+import isArray from 'shared\/isArray';\n \n \/\/ Per response, global state that is not contextual to the rendering subtree.\n export type ResponseState = {\ndiff --git a\/packages\/react-dom\/src\/server\/ReactPartialRenderer.js b\/packages\/react-dom\/src\/server\/ReactPartialRenderer.js\nindex 4d2aeb5b38..90fbfd6ad4 100644\n--- a\/packages\/react-dom\/src\/server\/ReactPartialRenderer.js\n+++ b\/packages\/react-dom\/src\/server\/ReactPartialRenderer.js\n@@ -14,6 +14,7 @@ import type {ReactProvider, ReactContext} from 'shared\/ReactTypes';\n \n import * as React from 'react';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import getComponentNameFromType from 'shared\/getComponentNameFromType';\n import {describeUnknownElementTypeFrameInDEV} from 'shared\/ReactComponentStackFrame';\n import ReactSharedInternals from 'shared\/ReactSharedInternals';\n@@ -1438,7 +1439,7 @@ class ReactDOMServerRenderer {\n             defaultValue == null,\n             'If you supply `defaultValue` on a <textarea>, do not pass children.',\n           );\n-          if (Array.isArray(textareaChildren)) {\n+          if (isArray(textareaChildren)) {\n             invariant(\n               textareaChildren.length <= 1,\n               '<textarea> can only have at most one child.',\n@@ -1467,14 +1468,14 @@ class ReactDOMServerRenderer {\n           if (props[propName] == null) {\n             continue;\n           }\n-          const isArray = Array.isArray(props[propName]);\n-          if (props.multiple && !isArray) {\n+          const propNameIsArray = isArray(props[propName]);\n+          if (props.multiple && !propNameIsArray) {\n             console.error(\n               'The `%s` prop supplied to <select> must be an array if ' +\n                 '`multiple` is true.',\n               propName,\n             );\n-          } else if (!props.multiple && isArray) {\n+          } else if (!props.multiple && propNameIsArray) {\n             console.error(\n               'The `%s` prop supplied to <select> must be a scalar ' +\n                 'value if `multiple` is false.',\n@@ -1515,7 +1516,7 @@ class ReactDOMServerRenderer {\n           value = optionChildren;\n         }\n         selected = false;\n-        if (Array.isArray(selectValue)) {\n+        if (isArray(selectValue)) {\n           \/\/ multiple\n           for (let j = 0; j < selectValue.length; j++) {\n             if ('' + selectValue[j] === value) {\ndiff --git a\/packages\/react-dom\/src\/test-utils\/ReactTestUtils.js b\/packages\/react-dom\/src\/test-utils\/ReactTestUtils.js\nindex dc59d2a644..492ab02d11 100644\n--- a\/packages\/react-dom\/src\/test-utils\/ReactTestUtils.js\n+++ b\/packages\/react-dom\/src\/test-utils\/ReactTestUtils.js\n@@ -24,6 +24,7 @@ import {\n   rethrowCaughtError,\n   invokeGuardedCallbackAndCatchFirstError,\n } from 'shared\/ReactErrorUtils';\n+import isArray from 'shared\/isArray';\n \n \/\/ Keep in sync with ReactDOM.js, and ReactTestUtilsAct.js:\n const EventInternals =\n@@ -97,7 +98,7 @@ function validateClassInstance(inst, methodName) {\n   }\n   let received;\n   const stringified = '' + inst;\n-  if (Array.isArray(inst)) {\n+  if (isArray(inst)) {\n     received = 'an array';\n   } else if (inst && inst.nodeType === ELEMENT_NODE && inst.tagName) {\n     received = 'a DOM node';\n@@ -197,7 +198,7 @@ function scryRenderedDOMComponentsWithClass(root, classNames) {\n       }\n       const classList = className.split(\/\\s+\/);\n \n-      if (!Array.isArray(classNames)) {\n+      if (!isArray(classNames)) {\n         invariant(\n           classNames !== undefined,\n           'TestUtils.scryRenderedDOMComponentsWithClass expects a ' +\n@@ -365,7 +366,7 @@ function executeDispatch(event, listener, inst) {\n function executeDispatchesInOrder(event) {\n   const dispatchListeners = event._dispatchListeners;\n   const dispatchInstances = event._dispatchInstances;\n-  if (Array.isArray(dispatchListeners)) {\n+  if (isArray(dispatchListeners)) {\n     for (let i = 0; i < dispatchListeners.length; i++) {\n       if (event.isPropagationStopped()) {\n         break;\ndiff --git a\/packages\/react-native-renderer\/src\/ReactNativeAttributePayload.js b\/packages\/react-native-renderer\/src\/ReactNativeAttributePayload.js\nindex fa1187bc33..d388f4046a 100644\n--- a\/packages\/react-native-renderer\/src\/ReactNativeAttributePayload.js\n+++ b\/packages\/react-native-renderer\/src\/ReactNativeAttributePayload.js\n@@ -12,6 +12,7 @@ import {\n   deepDiffer,\n   flattenStyle,\n } from 'react-native\/Libraries\/ReactPrivate\/ReactNativePrivateInterface';\n+import isArray from 'shared\/isArray';\n \n import type {AttributeConfiguration} from '.\/ReactNativeTypes';\n \n@@ -51,7 +52,7 @@ function restoreDeletedValuesInNestedArray(\n   node: NestedNode,\n   validAttributes: AttributeConfiguration,\n ) {\n-  if (Array.isArray(node)) {\n+  if (isArray(node)) {\n     let i = node.length;\n     while (i-- && removedKeyCount > 0) {\n       restoreDeletedValuesInNestedArray(\n@@ -163,12 +164,12 @@ function diffNestedProperty(\n     return updatePayload;\n   }\n \n-  if (!Array.isArray(prevProp) && !Array.isArray(nextProp)) {\n+  if (!isArray(prevProp) && !isArray(nextProp)) {\n     \/\/ Both are leaves, we can diff the leaves.\n     return diffProperties(updatePayload, prevProp, nextProp, validAttributes);\n   }\n \n-  if (Array.isArray(prevProp) && Array.isArray(nextProp)) {\n+  if (isArray(prevProp) && isArray(nextProp)) {\n     \/\/ Both are arrays, we can diff the arrays.\n     return diffNestedArrayProperty(\n       updatePayload,\n@@ -178,7 +179,7 @@ function diffNestedProperty(\n     );\n   }\n \n-  if (Array.isArray(prevProp)) {\n+  if (isArray(prevProp)) {\n     return diffProperties(\n       updatePayload,\n       \/\/ $FlowFixMe - We know that this is always an object when the input is.\n@@ -212,7 +213,7 @@ function addNestedProperty(\n     return updatePayload;\n   }\n \n-  if (!Array.isArray(nextProp)) {\n+  if (!isArray(nextProp)) {\n     \/\/ Add each property of the leaf.\n     return addProperties(updatePayload, nextProp, validAttributes);\n   }\n@@ -242,7 +243,7 @@ function clearNestedProperty(\n     return updatePayload;\n   }\n \n-  if (!Array.isArray(prevProp)) {\n+  if (!isArray(prevProp)) {\n     \/\/ Add each property of the leaf.\n     return clearProperties(updatePayload, prevProp, validAttributes);\n   }\ndiff --git a\/packages\/react-native-renderer\/src\/legacy-events\/EventPluginUtils.js b\/packages\/react-native-renderer\/src\/legacy-events\/EventPluginUtils.js\nindex abba8e9a3d..381ebafc59 100644\n--- a\/packages\/react-native-renderer\/src\/legacy-events\/EventPluginUtils.js\n+++ b\/packages\/react-native-renderer\/src\/legacy-events\/EventPluginUtils.js\n@@ -7,6 +7,7 @@\n \n import {invokeGuardedCallbackAndCatchFirstError} from 'shared\/ReactErrorUtils';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n \n export let getFiberCurrentPropsFromNode = null;\n export let getInstanceFromNode = null;\n@@ -36,14 +37,14 @@ if (__DEV__) {\n     const dispatchListeners = event._dispatchListeners;\n     const dispatchInstances = event._dispatchInstances;\n \n-    const listenersIsArr = Array.isArray(dispatchListeners);\n+    const listenersIsArr = isArray(dispatchListeners);\n     const listenersLen = listenersIsArr\n       ? dispatchListeners.length\n       : dispatchListeners\n       ? 1\n       : 0;\n \n-    const instancesIsArr = Array.isArray(dispatchInstances);\n+    const instancesIsArr = isArray(dispatchInstances);\n     const instancesLen = instancesIsArr\n       ? dispatchInstances.length\n       : dispatchInstances\n@@ -78,7 +79,7 @@ export function executeDispatchesInOrder(event) {\n   if (__DEV__) {\n     validateEventDispatches(event);\n   }\n-  if (Array.isArray(dispatchListeners)) {\n+  if (isArray(dispatchListeners)) {\n     for (let i = 0; i < dispatchListeners.length; i++) {\n       if (event.isPropagationStopped()) {\n         break;\n@@ -106,7 +107,7 @@ function executeDispatchesInOrderStopAtTrueImpl(event) {\n   if (__DEV__) {\n     validateEventDispatches(event);\n   }\n-  if (Array.isArray(dispatchListeners)) {\n+  if (isArray(dispatchListeners)) {\n     for (let i = 0; i < dispatchListeners.length; i++) {\n       if (event.isPropagationStopped()) {\n         break;\n@@ -150,7 +151,7 @@ export function executeDirectDispatch(event) {\n   const dispatchListener = event._dispatchListeners;\n   const dispatchInstance = event._dispatchInstances;\n   invariant(\n-    !Array.isArray(dispatchListener),\n+    !isArray(dispatchListener),\n     'executeDirectDispatch(...): Invalid `event`.',\n   );\n   event.currentTarget = dispatchListener\ndiff --git a\/packages\/react-native-renderer\/src\/legacy-events\/accumulate.js b\/packages\/react-native-renderer\/src\/legacy-events\/accumulate.js\nindex 6fcf9f1fd8..af4da85393 100644\n--- a\/packages\/react-native-renderer\/src\/legacy-events\/accumulate.js\n+++ b\/packages\/react-native-renderer\/src\/legacy-events\/accumulate.js\n@@ -8,6 +8,7 @@\n  *\/\n \n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n \n \/**\n  * Accumulates items that must not be null or undefined.\n@@ -31,11 +32,11 @@ function accumulate<T>(\n \n   \/\/ Both are not empty. Warning: Never call x.concat(y) when you are not\n   \/\/ certain that x is an Array (x could be a string with concat method).\n-  if (Array.isArray(current)) {\n+  if (isArray(current)) {\n     return current.concat(next);\n   }\n \n-  if (Array.isArray(next)) {\n+  if (isArray(next)) {\n     return [current].concat(next);\n   }\n \ndiff --git a\/packages\/react-native-renderer\/src\/legacy-events\/accumulateInto.js b\/packages\/react-native-renderer\/src\/legacy-events\/accumulateInto.js\nindex 35625311da..d704733d9d 100644\n--- a\/packages\/react-native-renderer\/src\/legacy-events\/accumulateInto.js\n+++ b\/packages\/react-native-renderer\/src\/legacy-events\/accumulateInto.js\n@@ -8,6 +8,7 @@\n  *\/\n \n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n \n \/**\n  * Accumulates items that must not be null or undefined into the first one. This\n@@ -37,8 +38,8 @@ function accumulateInto<T>(\n \n   \/\/ Both are not empty. Warning: Never call x.concat(y) when you are not\n   \/\/ certain that x is an Array (x could be a string with concat method).\n-  if (Array.isArray(current)) {\n-    if (Array.isArray(next)) {\n+  if (isArray(current)) {\n+    if (isArray(next)) {\n       current.push.apply(current, next);\n       return current;\n     }\n@@ -46,7 +47,7 @@ function accumulateInto<T>(\n     return current;\n   }\n \n-  if (Array.isArray(next)) {\n+  if (isArray(next)) {\n     \/\/ A bit too dangerous to mutate `next`.\n     return [current].concat(next);\n   }\ndiff --git a\/packages\/react-noop-renderer\/src\/createReactNoop.js b\/packages\/react-noop-renderer\/src\/createReactNoop.js\nindex ce80ca3374..9d2c87621b 100644\n--- a\/packages\/react-noop-renderer\/src\/createReactNoop.js\n+++ b\/packages\/react-noop-renderer\/src\/createReactNoop.js\n@@ -21,6 +21,7 @@ import type {RootTag} from 'react-reconciler\/src\/ReactRootTags';\n \n import * as Scheduler from 'scheduler\/unstable_mock';\n import {REACT_FRAGMENT_TYPE, REACT_ELEMENT_TYPE} from 'shared\/ReactSymbols';\n+import isArray from 'shared\/isArray';\n import {\n   DefaultEventPriority,\n   IdleEventPriority,\n@@ -604,7 +605,7 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {\n     if (typeof child === 'string') {\n       return child;\n     }\n-    if (Array.isArray(child)) {\n+    if (isArray(child)) {\n       if (child.length === 0) {\n         return null;\n       }\n@@ -618,7 +619,7 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {\n       }\n       return children;\n     }\n-    if (Array.isArray(child.children)) {\n+    if (isArray(child.children)) {\n       \/\/ This is an instance.\n       const instance: Instance = (child: any);\n       const children = childToJSX(instance.children, instance.text);\n@@ -668,7 +669,7 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {\n     if (children === null) {\n       return null;\n     }\n-    if (Array.isArray(children)) {\n+    if (isArray(children)) {\n       return {\n         $$typeof: REACT_ELEMENT_TYPE,\n         type: REACT_FRAGMENT_TYPE,\n@@ -687,7 +688,7 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {\n     if (children === null) {\n       return null;\n     }\n-    if (Array.isArray(children)) {\n+    if (isArray(children)) {\n       return {\n         $$typeof: REACT_ELEMENT_TYPE,\n         type: REACT_FRAGMENT_TYPE,\ndiff --git a\/packages\/react-reconciler\/src\/ReactChildFiber.new.js b\/packages\/react-reconciler\/src\/ReactChildFiber.new.js\nindex f9041ce659..12a693c2d2 100644\n--- a\/packages\/react-reconciler\/src\/ReactChildFiber.new.js\n+++ b\/packages\/react-reconciler\/src\/ReactChildFiber.new.js\n@@ -31,6 +31,7 @@ import {\n   SimpleMemoComponent,\n } from '.\/ReactWorkTags';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import {\n   warnAboutStringRefs,\n   enableLazyElements,\n@@ -97,8 +98,6 @@ if (__DEV__) {\n   };\n }\n \n-const isArray = Array.isArray;\n-\n function coerceRef(\n   returnFiber: Fiber,\n   current: Fiber | null,\ndiff --git a\/packages\/react-reconciler\/src\/ReactChildFiber.old.js b\/packages\/react-reconciler\/src\/ReactChildFiber.old.js\nindex 10c4ccb4dc..ad3bcdead7 100644\n--- a\/packages\/react-reconciler\/src\/ReactChildFiber.old.js\n+++ b\/packages\/react-reconciler\/src\/ReactChildFiber.old.js\n@@ -11,6 +11,7 @@ import type {ReactElement} from 'shared\/ReactElementType';\n import type {ReactPortal} from 'shared\/ReactTypes';\n import type {Fiber} from '.\/ReactInternalTypes';\n import type {Lanes} from '.\/ReactFiberLane.old';\n+import isArray from 'shared\/isArray';\n \n import getComponentNameFromFiber from 'react-reconciler\/src\/getComponentNameFromFiber';\n import {Placement, ChildDeletion} from '.\/ReactFiberFlags';\n@@ -97,8 +98,6 @@ if (__DEV__) {\n   };\n }\n \n-const isArray = Array.isArray;\n-\n function coerceRef(\n   returnFiber: Fiber,\n   current: Fiber | null,\ndiff --git a\/packages\/react-reconciler\/src\/ReactFiberClassComponent.new.js b\/packages\/react-reconciler\/src\/ReactFiberClassComponent.new.js\nindex ea1b4cb5e3..efdd40b043 100644\n--- a\/packages\/react-reconciler\/src\/ReactFiberClassComponent.new.js\n+++ b\/packages\/react-reconciler\/src\/ReactFiberClassComponent.new.js\n@@ -29,6 +29,7 @@ import shallowEqual from 'shared\/shallowEqual';\n import getComponentNameFromFiber from 'react-reconciler\/src\/getComponentNameFromFiber';\n import getComponentNameFromType from 'shared\/getComponentNameFromType';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import {REACT_CONTEXT_TYPE, REACT_PROVIDER_TYPE} from 'shared\/ReactSymbols';\n \n import {resolveDefaultProps} from '.\/ReactFiberLazyComponent.new';\n@@ -74,7 +75,6 @@ import {\n } from '.\/SchedulingProfiler';\n \n const fakeInternalInstance = {};\n-const isArray = Array.isArray;\n \n \/\/ React.Component uses a shared frozen object by default.\n \/\/ We'll use it to determine whether we need to initialize legacy refs.\ndiff --git a\/packages\/react-reconciler\/src\/ReactFiberClassComponent.old.js b\/packages\/react-reconciler\/src\/ReactFiberClassComponent.old.js\nindex b952c24cd0..a34fe1d564 100644\n--- a\/packages\/react-reconciler\/src\/ReactFiberClassComponent.old.js\n+++ b\/packages\/react-reconciler\/src\/ReactFiberClassComponent.old.js\n@@ -29,6 +29,7 @@ import shallowEqual from 'shared\/shallowEqual';\n import getComponentNameFromFiber from 'react-reconciler\/src\/getComponentNameFromFiber';\n import getComponentNameFromType from 'shared\/getComponentNameFromType';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import {REACT_CONTEXT_TYPE, REACT_PROVIDER_TYPE} from 'shared\/ReactSymbols';\n \n import {resolveDefaultProps} from '.\/ReactFiberLazyComponent.old';\n@@ -74,7 +75,6 @@ import {\n } from '.\/SchedulingProfiler';\n \n const fakeInternalInstance = {};\n-const isArray = Array.isArray;\n \n \/\/ React.Component uses a shared frozen object by default.\n \/\/ We'll use it to determine whether we need to initialize legacy refs.\ndiff --git a\/packages\/react-reconciler\/src\/ReactFiberReconciler.new.js b\/packages\/react-reconciler\/src\/ReactFiberReconciler.new.js\nindex bbe8810ff5..4572e4d9de 100644\n--- a\/packages\/react-reconciler\/src\/ReactFiberReconciler.new.js\n+++ b\/packages\/react-reconciler\/src\/ReactFiberReconciler.new.js\n@@ -34,6 +34,7 @@ import {\n } from '.\/ReactWorkTags';\n import getComponentNameFromFiber from 'react-reconciler\/src\/getComponentNameFromFiber';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import {enableSchedulingProfiler} from 'shared\/ReactFeatureFlags';\n import ReactSharedInternals from 'shared\/ReactSharedInternals';\n import {getPublicInstance} from '.\/ReactFiberHostConfig';\n@@ -482,9 +483,9 @@ if (__DEV__) {\n     index: number,\n   ) => {\n     const key = path[index];\n-    const updated = Array.isArray(obj) ? obj.slice() : {...obj};\n+    const updated = isArray(obj) ? obj.slice() : {...obj};\n     if (index + 1 === path.length) {\n-      if (Array.isArray(updated)) {\n+      if (isArray(updated)) {\n         updated.splice(((key: any): number), 1);\n       } else {\n         delete updated[key];\n@@ -510,12 +511,12 @@ if (__DEV__) {\n     index: number,\n   ) => {\n     const oldKey = oldPath[index];\n-    const updated = Array.isArray(obj) ? obj.slice() : {...obj};\n+    const updated = isArray(obj) ? obj.slice() : {...obj};\n     if (index + 1 === oldPath.length) {\n       const newKey = newPath[index];\n       \/\/ $FlowFixMe number or string is fine here\n       updated[newKey] = updated[oldKey];\n-      if (Array.isArray(updated)) {\n+      if (isArray(updated)) {\n         updated.splice(((oldKey: any): number), 1);\n       } else {\n         delete updated[oldKey];\n@@ -564,7 +565,7 @@ if (__DEV__) {\n       return value;\n     }\n     const key = path[index];\n-    const updated = Array.isArray(obj) ? obj.slice() : {...obj};\n+    const updated = isArray(obj) ? obj.slice() : {...obj};\n     \/\/ $FlowFixMe number or string is fine here\n     updated[key] = copyWithSetImpl(obj[key], path, index + 1, value);\n     return updated;\ndiff --git a\/packages\/react-reconciler\/src\/ReactFiberReconciler.old.js b\/packages\/react-reconciler\/src\/ReactFiberReconciler.old.js\nindex c6ced2f5be..abd5b9094c 100644\n--- a\/packages\/react-reconciler\/src\/ReactFiberReconciler.old.js\n+++ b\/packages\/react-reconciler\/src\/ReactFiberReconciler.old.js\n@@ -34,6 +34,7 @@ import {\n } from '.\/ReactWorkTags';\n import getComponentNameFromFiber from 'react-reconciler\/src\/getComponentNameFromFiber';\n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import {enableSchedulingProfiler} from 'shared\/ReactFeatureFlags';\n import ReactSharedInternals from 'shared\/ReactSharedInternals';\n import {getPublicInstance} from '.\/ReactFiberHostConfig';\n@@ -482,9 +483,9 @@ if (__DEV__) {\n     index: number,\n   ) => {\n     const key = path[index];\n-    const updated = Array.isArray(obj) ? obj.slice() : {...obj};\n+    const updated = isArray(obj) ? obj.slice() : {...obj};\n     if (index + 1 === path.length) {\n-      if (Array.isArray(updated)) {\n+      if (isArray(updated)) {\n         updated.splice(((key: any): number), 1);\n       } else {\n         delete updated[key];\n@@ -510,12 +511,12 @@ if (__DEV__) {\n     index: number,\n   ) => {\n     const oldKey = oldPath[index];\n-    const updated = Array.isArray(obj) ? obj.slice() : {...obj};\n+    const updated = isArray(obj) ? obj.slice() : {...obj};\n     if (index + 1 === oldPath.length) {\n       const newKey = newPath[index];\n       \/\/ $FlowFixMe number or string is fine here\n       updated[newKey] = updated[oldKey];\n-      if (Array.isArray(updated)) {\n+      if (isArray(updated)) {\n         updated.splice(((oldKey: any): number), 1);\n       } else {\n         delete updated[oldKey];\n@@ -564,7 +565,7 @@ if (__DEV__) {\n       return value;\n     }\n     const key = path[index];\n-    const updated = Array.isArray(obj) ? obj.slice() : {...obj};\n+    const updated = isArray(obj) ? obj.slice() : {...obj};\n     \/\/ $FlowFixMe number or string is fine here\n     updated[key] = copyWithSetImpl(obj[key], path, index + 1, value);\n     return updated;\ndiff --git a\/packages\/react-server-dom-relay\/src\/ReactFlightDOMRelayServerHostConfig.js b\/packages\/react-server-dom-relay\/src\/ReactFlightDOMRelayServerHostConfig.js\nindex a4d0d26fcc..85eace536a 100644\n--- a\/packages\/react-server-dom-relay\/src\/ReactFlightDOMRelayServerHostConfig.js\n+++ b\/packages\/react-server-dom-relay\/src\/ReactFlightDOMRelayServerHostConfig.js\n@@ -14,6 +14,7 @@ import type {Request, ReactModel} from 'react-server\/src\/ReactFlightServer';\n import JSResourceReference from 'JSResourceReference';\n \n import hasOwnProperty from 'shared\/hasOwnProperty';\n+import isArray from 'shared\/isArray';\n \n export type ModuleReference<T> = JSResourceReference<T>;\n \n@@ -82,7 +83,7 @@ function convertModelToJSON(\n ): JSONValue {\n   const json = resolveModelToJSON(request, parent, key, model);\n   if (typeof json === 'object' && json !== null) {\n-    if (Array.isArray(json)) {\n+    if (isArray(json)) {\n       const jsonArray: Array<JSONValue> = [];\n       for (let i = 0; i < json.length; i++) {\n         jsonArray[i] = convertModelToJSON(request, json, '' + i, json[i]);\ndiff --git a\/packages\/react-server-native-relay\/src\/ReactFlightNativeRelayServerHostConfig.js b\/packages\/react-server-native-relay\/src\/ReactFlightNativeRelayServerHostConfig.js\nindex 4fa871b0c4..0624e693cf 100644\n--- a\/packages\/react-server-native-relay\/src\/ReactFlightNativeRelayServerHostConfig.js\n+++ b\/packages\/react-server-native-relay\/src\/ReactFlightNativeRelayServerHostConfig.js\n@@ -8,9 +8,9 @@\n  *\/\n \n import type {RowEncoding, JSONValue} from '.\/ReactFlightNativeRelayProtocol';\n-\n import type {Request, ReactModel} from 'react-server\/src\/ReactFlightServer';\n import hasOwnProperty from 'shared\/hasOwnProperty';\n+import isArray from 'shared\/isArray';\n import JSResourceReferenceImpl from 'JSResourceReferenceImpl';\n \n export type ModuleReference<T> = JSResourceReferenceImpl<T>;\n@@ -80,7 +80,7 @@ function convertModelToJSON(\n ): JSONValue {\n   const json = resolveModelToJSON(request, parent, key, model);\n   if (typeof json === 'object' && json !== null) {\n-    if (Array.isArray(json)) {\n+    if (isArray(json)) {\n       const jsonArray: Array<JSONValue> = [];\n       for (let i = 0; i < json.length; i++) {\n         jsonArray[i] = convertModelToJSON(request, json, '' + i, json[i]);\ndiff --git a\/packages\/react-server\/src\/ReactFizzServer.js b\/packages\/react-server\/src\/ReactFizzServer.js\nindex 66a6c9238a..75beaf0f21 100644\n--- a\/packages\/react-server\/src\/ReactFizzServer.js\n+++ b\/packages\/react-server\/src\/ReactFizzServer.js\n@@ -51,6 +51,7 @@ import {REACT_ELEMENT_TYPE, REACT_SUSPENSE_TYPE} from 'shared\/ReactSymbols';\n import ReactSharedInternals from 'shared\/ReactSharedInternals';\n \n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n \n const ReactCurrentDispatcher = ReactSharedInternals.ReactCurrentDispatcher;\n \n@@ -287,7 +288,7 @@ function renderNode(request: Request, task: Task, node: ReactNodeList): void {\n     return;\n   }\n \n-  if (Array.isArray(node)) {\n+  if (isArray(node)) {\n     if (node.length > 0) {\n       for (let i = 0; i < node.length; i++) {\n         renderNode(request, task, node[i]);\ndiff --git a\/packages\/react-server\/src\/ReactFlightServer.js b\/packages\/react-server\/src\/ReactFlightServer.js\nindex dfbe3c55f9..58c3a9219f 100644\n--- a\/packages\/react-server\/src\/ReactFlightServer.js\n+++ b\/packages\/react-server\/src\/ReactFlightServer.js\n@@ -44,8 +44,7 @@ import {\n \n import ReactSharedInternals from 'shared\/ReactSharedInternals';\n import invariant from 'shared\/invariant';\n-\n-const isArray = Array.isArray;\n+import isArray from 'shared\/isArray';\n \n type ReactJSONValue =\n   | string\ndiff --git a\/packages\/react\/src\/ReactChildren.js b\/packages\/react\/src\/ReactChildren.js\nindex eb9ef5aca9..9acdc068e8 100644\n--- a\/packages\/react\/src\/ReactChildren.js\n+++ b\/packages\/react\/src\/ReactChildren.js\n@@ -10,6 +10,7 @@\n import type {ReactNodeList} from 'shared\/ReactTypes';\n \n import invariant from 'shared\/invariant';\n+import isArray from 'shared\/isArray';\n import {\n   getIteratorFn,\n   REACT_ELEMENT_TYPE,\n@@ -110,7 +111,7 @@ function mapIntoArray(\n     \/\/ so that it's consistent if the number of children grows:\n     const childKey =\n       nameSoFar === '' ? SEPARATOR + getElementKey(child, 0) : nameSoFar;\n-    if (Array.isArray(mappedChild)) {\n+    if (isArray(mappedChild)) {\n       let escapedChildKey = '';\n       if (childKey != null) {\n         escapedChildKey = escapeUserProvidedKey(childKey) + '\/';\n@@ -142,7 +143,7 @@ function mapIntoArray(\n   const nextNamePrefix =\n     nameSoFar === '' ? SEPARATOR : nameSoFar + SUBSEPARATOR;\n \n-  if (Array.isArray(children)) {\n+  if (isArray(children)) {\n     for (let i = 0; i < children.length; i++) {\n       child = children[i];\n       nextName = nextNamePrefix + getElementKey(child, i);\ndiff --git a\/packages\/react\/src\/ReactElementValidator.js b\/packages\/react\/src\/ReactElementValidator.js\nindex 2c14bef6c0..f9d2cbb95a 100644\n--- a\/packages\/react\/src\/ReactElementValidator.js\n+++ b\/packages\/react\/src\/ReactElementValidator.js\n@@ -23,6 +23,7 @@ import {\n } from 'shared\/ReactSymbols';\n import {warnAboutSpreadingKeyToJSX} from 'shared\/ReactFeatureFlags';\n import checkPropTypes from 'shared\/checkPropTypes';\n+import isArray from 'shared\/isArray';\n \n import ReactCurrentOwner from '.\/ReactCurrentOwner';\n import {\n@@ -168,7 +169,7 @@ function validateChildKeys(node, parentType) {\n   if (typeof node !== 'object') {\n     return;\n   }\n-  if (Array.isArray(node)) {\n+  if (isArray(node)) {\n     for (let i = 0; i < node.length; i++) {\n       const child = node[i];\n       if (isValidElement(child)) {\n@@ -313,7 +314,7 @@ export function jsxWithValidation(\n     let typeString;\n     if (type === null) {\n       typeString = 'null';\n-    } else if (Array.isArray(type)) {\n+    } else if (isArray(type)) {\n       typeString = 'array';\n     } else if (type !== undefined && type.$$typeof === REACT_ELEMENT_TYPE) {\n       typeString = `<${getComponentNameFromType(type.type) || 'Unknown'} \/>`;\n@@ -352,7 +353,7 @@ export function jsxWithValidation(\n     const children = props.children;\n     if (children !== undefined) {\n       if (isStaticChildren) {\n-        if (Array.isArray(children)) {\n+        if (isArray(children)) {\n           for (let i = 0; i < children.length; i++) {\n             validateChildKeys(children[i], type);\n           }\n@@ -437,7 +438,7 @@ export function createElementWithValidation(type, props, children) {\n     let typeString;\n     if (type === null) {\n       typeString = 'null';\n-    } else if (Array.isArray(type)) {\n+    } else if (isArray(type)) {\n       typeString = 'array';\n     } else if (type !== undefined && type.$$typeof === REACT_ELEMENT_TYPE) {\n       typeString = `<${getComponentNameFromType(type.type) || 'Unknown'} \/>`;\ndiff --git a\/packages\/react\/src\/jsx\/ReactJSXElementValidator.js b\/packages\/react\/src\/jsx\/ReactJSXElementValidator.js\nindex c77b5ef6e9..84cf3eb2ca 100644\n--- a\/packages\/react\/src\/jsx\/ReactJSXElementValidator.js\n+++ b\/packages\/react\/src\/jsx\/ReactJSXElementValidator.js\n@@ -23,6 +23,7 @@ import {\n } from 'shared\/ReactSymbols';\n import {warnAboutSpreadingKeyToJSX} from 'shared\/ReactFeatureFlags';\n import hasOwnProperty from 'shared\/hasOwnProperty';\n+import isArray from 'shared\/isArray';\n import {jsxDEV} from '.\/ReactJSXElement';\n \n import {describeUnknownElementTypeFrameInDEV} from 'shared\/ReactComponentStackFrame';\n@@ -182,7 +183,7 @@ function validateChildKeys(node, parentType) {\n     if (typeof node !== 'object') {\n       return;\n     }\n-    if (Array.isArray(node)) {\n+    if (isArray(node)) {\n       for (let i = 0; i < node.length; i++) {\n         const child = node[i];\n         if (isValidElement(child)) {\n@@ -329,7 +330,7 @@ export function jsxWithValidation(\n       let typeString;\n       if (type === null) {\n         typeString = 'null';\n-      } else if (Array.isArray(type)) {\n+      } else if (isArray(type)) {\n         typeString = 'array';\n       } else if (type !== undefined && type.$$typeof === REACT_ELEMENT_TYPE) {\n         typeString = `<${getComponentNameFromType(type.type) || 'Unknown'} \/>`;\n@@ -366,7 +367,7 @@ export function jsxWithValidation(\n       const children = props.children;\n       if (children !== undefined) {\n         if (isStaticChildren) {\n-          if (Array.isArray(children)) {\n+          if (isArray(children)) {\n             for (let i = 0; i < children.length; i++) {\n               validateChildKeys(children[i], type);\n             }\ndiff --git a\/packages\/shared\/isArray.js b\/packages\/shared\/isArray.js\nnew file mode 100644\nindex 0000000000..6dc19d89b2\n--- \/dev\/null\n+++ b\/packages\/shared\/isArray.js\n@@ -0,0 +1,12 @@\n+\/**\n+ * Copyright (c) Facebook, Inc. and its affiliates.\n+ *\n+ * This source code is licensed under the MIT license found in the\n+ * LICENSE file in the root directory of this source tree.\n+ *\n+ * @flow\n+ *\/\n+\n+const isArray = Array.isArray;\n+\n+export default isArray;\n","body":"","parents":["2c9fef32db5c9a342a1a60c34217ffc9ae087fbb"]}</article></body></html>

dillon1000/react

Files changed