isValidElementType() — react Function Reference

Architecture documentation for the isValidElementType() function in ReactIs.js from the react codebase.

Function javascript BabelCompiler Validation

Entity Profile

BabelCompiler→ Validation→ isValidElementType() — react Function Reference

Dependency Diagram

graph TD
  47bf41b8_cea1_270e_dbd8_919e33dfae18["isValidElementType()"]
  dfae0a13_bd8b_97d9_0260_bcccc6acd4f8["ReactIs.js"]
  47bf41b8_cea1_270e_dbd8_919e33dfae18 -->|defined in| dfae0a13_bd8b_97d9_0260_bcccc6acd4f8
  style 47bf41b8_cea1_270e_dbd8_919e33dfae18 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-is/src/ReactIs.js lines 92–131

export function isValidElementType(type: mixed): boolean {
  if (typeof type === 'string' || typeof type === 'function') {
    return true;
  }

  // Note: typeof might be other than 'symbol' or 'number' (e.g. if it's a polyfill).
  if (
    type === REACT_FRAGMENT_TYPE ||
    type === REACT_PROFILER_TYPE ||
    type === REACT_STRICT_MODE_TYPE ||
    type === REACT_SUSPENSE_TYPE ||
    type === REACT_SUSPENSE_LIST_TYPE ||
    (enableLegacyHidden && type === REACT_LEGACY_HIDDEN_TYPE) ||
    (enableScopeAPI && type === REACT_SCOPE_TYPE) ||
    (enableTransitionTracing && type === REACT_TRACING_MARKER_TYPE) ||
    (enableViewTransition && type === REACT_VIEW_TRANSITION_TYPE)
  ) {
    return true;
  }

  if (typeof type === 'object' && type !== null) {
    if (
      type.$$typeof === REACT_LAZY_TYPE ||
      type.$$typeof === REACT_MEMO_TYPE ||
      type.$$typeof === REACT_CONTEXT_TYPE ||
      type.$$typeof === REACT_CONSUMER_TYPE ||
      type.$$typeof === REACT_FORWARD_REF_TYPE ||
      // This needs to include all possible module reference object
      // types supported by any Flight configuration anywhere since
      // we don't know which Flight build this will end up being used
      // with.
      type.$$typeof === REACT_CLIENT_REFERENCE ||
      type.getModuleId !== undefined
    ) {
      return true;
    }
  }

  return false;
}