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| 1 | +/* eslint-disable @typescript-eslint/explicit-module-boundary-types */ |
| 2 | +// This file is mostly copy-pasted from the original ReactIs library, |
| 3 | +// with some modifications to support React versions < 19. |
| 4 | +// https://github.com/facebook/react/blob/main/packages/react-is/src/ReactIs.js |
| 5 | + |
| 6 | +// Customizations: |
| 7 | +// - Added support for REACT_LEGACY_ELEMENT_TYPE wherever REACT_ELEMENT_TYPE is used. |
| 8 | + |
| 9 | +// Types collected from https://github.com/facebook/react/blob/main/packages/shared/ReactSymbols.js |
| 10 | +const REACT_LEGACY_ELEMENT_TYPE: symbol = Symbol.for('react.element'); |
| 11 | +const REACT_ELEMENT_TYPE: symbol = Symbol.for('react.transitional.element'); |
| 12 | +const REACT_PORTAL_TYPE: symbol = Symbol.for('react.portal'); |
| 13 | +const REACT_FRAGMENT_TYPE: symbol = Symbol.for('react.fragment'); |
| 14 | +const REACT_STRICT_MODE_TYPE: symbol = Symbol.for('react.strict_mode'); |
| 15 | +const REACT_PROFILER_TYPE: symbol = Symbol.for('react.profiler'); |
| 16 | +const REACT_CONSUMER_TYPE: symbol = Symbol.for('react.consumer'); |
| 17 | +const REACT_CONTEXT_TYPE: symbol = Symbol.for('react.context'); |
| 18 | +const REACT_FORWARD_REF_TYPE: symbol = Symbol.for('react.forward_ref'); |
| 19 | +const REACT_SUSPENSE_TYPE: symbol = Symbol.for('react.suspense'); |
| 20 | +const REACT_SUSPENSE_LIST_TYPE: symbol = Symbol.for('react.suspense_list'); |
| 21 | +const REACT_MEMO_TYPE: symbol = Symbol.for('react.memo'); |
| 22 | +const REACT_LAZY_TYPE: symbol = Symbol.for('react.lazy'); |
| 23 | +const REACT_VIEW_TRANSITION_TYPE: symbol = Symbol.for('react.view_transition'); |
| 24 | +const REACT_CLIENT_REFERENCE: symbol = Symbol.for('react.client.reference'); |
| 25 | + |
| 26 | +// Below is a copy of ReactIs.js with customizations listed above. |
| 27 | + |
| 28 | +export function typeOf(object: any): any { |
| 29 | + if (typeof object === 'object' && object !== null) { |
| 30 | + const $$typeof = object.$$typeof; |
| 31 | + switch ($$typeof) { |
| 32 | + case REACT_LEGACY_ELEMENT_TYPE: |
| 33 | + case REACT_ELEMENT_TYPE: |
| 34 | + const type = object.type; |
| 35 | + |
| 36 | + switch (type) { |
| 37 | + case REACT_FRAGMENT_TYPE: |
| 38 | + case REACT_PROFILER_TYPE: |
| 39 | + case REACT_STRICT_MODE_TYPE: |
| 40 | + case REACT_SUSPENSE_TYPE: |
| 41 | + case REACT_SUSPENSE_LIST_TYPE: |
| 42 | + case REACT_VIEW_TRANSITION_TYPE: |
| 43 | + return type; |
| 44 | + default: |
| 45 | + const $$typeofType = type && type.$$typeof; |
| 46 | + |
| 47 | + switch ($$typeofType) { |
| 48 | + case REACT_CONTEXT_TYPE: |
| 49 | + case REACT_FORWARD_REF_TYPE: |
| 50 | + case REACT_LAZY_TYPE: |
| 51 | + case REACT_MEMO_TYPE: |
| 52 | + return $$typeofType; |
| 53 | + case REACT_CONSUMER_TYPE: |
| 54 | + return $$typeofType; |
| 55 | + // Fall through |
| 56 | + default: |
| 57 | + return $$typeof; |
| 58 | + } |
| 59 | + } |
| 60 | + case REACT_PORTAL_TYPE: |
| 61 | + return $$typeof; |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + return undefined; |
| 66 | +} |
| 67 | + |
| 68 | +export const ContextConsumer: symbol = REACT_CONSUMER_TYPE; |
| 69 | +export const ContextProvider: symbol = REACT_CONTEXT_TYPE; |
| 70 | +export const Element = REACT_ELEMENT_TYPE; |
| 71 | +export const ForwardRef = REACT_FORWARD_REF_TYPE; |
| 72 | +export const Fragment = REACT_FRAGMENT_TYPE; |
| 73 | +export const Lazy = REACT_LAZY_TYPE; |
| 74 | +export const Memo = REACT_MEMO_TYPE; |
| 75 | +export const Portal = REACT_PORTAL_TYPE; |
| 76 | +export const Profiler = REACT_PROFILER_TYPE; |
| 77 | +export const StrictMode = REACT_STRICT_MODE_TYPE; |
| 78 | +export const Suspense = REACT_SUSPENSE_TYPE; |
| 79 | +export const SuspenseList = REACT_SUSPENSE_LIST_TYPE; |
| 80 | + |
| 81 | +export function isValidElementType(type: any): boolean { |
| 82 | + if (typeof type === 'string' || typeof type === 'function') { |
| 83 | + return true; |
| 84 | + } |
| 85 | + |
| 86 | + // Note: typeof might be other than 'symbol' or 'number' (e.g. if it's a polyfill). |
| 87 | + if ( |
| 88 | + type === REACT_FRAGMENT_TYPE || |
| 89 | + type === REACT_PROFILER_TYPE || |
| 90 | + type === REACT_STRICT_MODE_TYPE || |
| 91 | + type === REACT_SUSPENSE_TYPE || |
| 92 | + type === REACT_SUSPENSE_LIST_TYPE |
| 93 | + ) { |
| 94 | + return true; |
| 95 | + } |
| 96 | + |
| 97 | + if (typeof type === 'object' && type !== null) { |
| 98 | + if ( |
| 99 | + type.$$typeof === REACT_LAZY_TYPE || |
| 100 | + type.$$typeof === REACT_MEMO_TYPE || |
| 101 | + type.$$typeof === REACT_CONTEXT_TYPE || |
| 102 | + type.$$typeof === REACT_CONSUMER_TYPE || |
| 103 | + type.$$typeof === REACT_FORWARD_REF_TYPE || |
| 104 | + // This needs to include all possible module reference object |
| 105 | + // types supported by any Flight configuration anywhere since |
| 106 | + // we don't know which Flight build this will end up being used |
| 107 | + // with. |
| 108 | + type.$$typeof === REACT_CLIENT_REFERENCE || |
| 109 | + type.getModuleId !== undefined |
| 110 | + ) { |
| 111 | + return true; |
| 112 | + } |
| 113 | + } |
| 114 | + |
| 115 | + return false; |
| 116 | +} |
| 117 | + |
| 118 | +export function isContextConsumer(object: any): boolean { |
| 119 | + return typeOf(object) === REACT_CONSUMER_TYPE; |
| 120 | +} |
| 121 | +export function isContextProvider(object: any): boolean { |
| 122 | + return typeOf(object) === REACT_CONTEXT_TYPE; |
| 123 | +} |
| 124 | +export function isElement(object: any): boolean { |
| 125 | + return ( |
| 126 | + typeof object === 'object' && |
| 127 | + object !== null && |
| 128 | + [REACT_ELEMENT_TYPE, REACT_LEGACY_ELEMENT_TYPE].includes(object.$$typeof) |
| 129 | + ); |
| 130 | +} |
| 131 | +export function isForwardRef(object: any): boolean { |
| 132 | + return typeOf(object) === REACT_FORWARD_REF_TYPE; |
| 133 | +} |
| 134 | +export function isFragment(object: any): boolean { |
| 135 | + return typeOf(object) === REACT_FRAGMENT_TYPE; |
| 136 | +} |
| 137 | +export function isLazy(object: any): boolean { |
| 138 | + return typeOf(object) === REACT_LAZY_TYPE; |
| 139 | +} |
| 140 | +export function isMemo(object: any): boolean { |
| 141 | + return typeOf(object) === REACT_MEMO_TYPE; |
| 142 | +} |
| 143 | +export function isPortal(object: any): boolean { |
| 144 | + return typeOf(object) === REACT_PORTAL_TYPE; |
| 145 | +} |
| 146 | +export function isProfiler(object: any): boolean { |
| 147 | + return typeOf(object) === REACT_PROFILER_TYPE; |
| 148 | +} |
| 149 | +export function isStrictMode(object: any): boolean { |
| 150 | + return typeOf(object) === REACT_STRICT_MODE_TYPE; |
| 151 | +} |
| 152 | +export function isSuspense(object: any): boolean { |
| 153 | + return typeOf(object) === REACT_SUSPENSE_TYPE; |
| 154 | +} |
| 155 | +export function isSuspenseList(object: any): boolean { |
| 156 | + return typeOf(object) === REACT_SUSPENSE_LIST_TYPE; |
| 157 | +} |
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