mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Sebastian Markbåge
587e759302
This was already defeating the XSS issue that Symbols was meant to protect against. So you were already supposed to use a polyfill for security. We rely on real Symbol.for in Flight for Server Components so those require real symbols anyway. We also don't really support IE without additional polyfills anyway.
78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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import {
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REACT_CONTEXT_TYPE,
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REACT_FORWARD_REF_TYPE,
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REACT_FRAGMENT_TYPE,
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REACT_PROFILER_TYPE,
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REACT_PROVIDER_TYPE,
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REACT_DEBUG_TRACING_MODE_TYPE,
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REACT_STRICT_MODE_TYPE,
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REACT_SUSPENSE_TYPE,
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REACT_SUSPENSE_LIST_TYPE,
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REACT_MEMO_TYPE,
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REACT_LAZY_TYPE,
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REACT_SCOPE_TYPE,
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REACT_LEGACY_HIDDEN_TYPE,
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REACT_OFFSCREEN_TYPE,
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REACT_CACHE_TYPE,
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REACT_TRACING_MARKER_TYPE,
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} from 'shared/ReactSymbols';
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import {
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enableScopeAPI,
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enableCache,
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enableTransitionTracing,
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} from './ReactFeatureFlags';
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const REACT_MODULE_REFERENCE: Symbol = Symbol.for('react.module.reference');
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export default function isValidElementType(type: mixed) {
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if (typeof type === 'string' || typeof type === 'function') {
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return true;
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}
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// Note: typeof might be other than 'symbol' or 'number' (e.g. if it's a polyfill).
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if (
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type === REACT_FRAGMENT_TYPE ||
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type === REACT_PROFILER_TYPE ||
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type === REACT_DEBUG_TRACING_MODE_TYPE ||
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type === REACT_STRICT_MODE_TYPE ||
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type === REACT_SUSPENSE_TYPE ||
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type === REACT_SUSPENSE_LIST_TYPE ||
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type === REACT_LEGACY_HIDDEN_TYPE ||
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type === REACT_OFFSCREEN_TYPE ||
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(enableScopeAPI && type === REACT_SCOPE_TYPE) ||
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(enableCache && type === REACT_CACHE_TYPE) ||
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(enableTransitionTracing && type === REACT_TRACING_MARKER_TYPE)
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) {
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return true;
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}
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if (typeof type === 'object' && type !== null) {
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if (
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type.$$typeof === REACT_LAZY_TYPE ||
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type.$$typeof === REACT_MEMO_TYPE ||
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type.$$typeof === REACT_PROVIDER_TYPE ||
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type.$$typeof === REACT_CONTEXT_TYPE ||
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type.$$typeof === REACT_FORWARD_REF_TYPE ||
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// This needs to include all possible module reference object
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// types supported by any Flight configuration anywhere since
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// we don't know which Flight build this will end up being used
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// with.
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type.$$typeof === REACT_MODULE_REFERENCE ||
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type.getModuleId !== undefined
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) {
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return true;
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}
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}
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return false;
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}
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