isConcurrentActEnvironment() — react Function Reference

Architecture documentation for the isConcurrentActEnvironment() function in ReactFiberAct.js from the react codebase.

Function javascript BabelCompiler Validation

Entity Profile

BabelCompiler→ Validation→ isConcurrentActEnvironment() — react Function Reference

Dependency Diagram

graph TD
  5a837e77_5208_2e63_cfa9_ed27c6fa5b1e["isConcurrentActEnvironment()"]
  f6d3a9ed_72f5_c7df_64e0_1c680d088e57["ReactFiberAct.js"]
  5a837e77_5208_2e63_cfa9_ed27c6fa5b1e -->|defined in| f6d3a9ed_72f5_c7df_64e0_1c680d088e57
  style 5a837e77_5208_2e63_cfa9_ed27c6fa5b1e fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-reconciler/src/ReactFiberAct.js lines 39–61

export function isConcurrentActEnvironment(): void | boolean {
  if (__DEV__) {
    const isReactActEnvironmentGlobal =
      // $FlowFixMe[cannot-resolve-name] Flow doesn't know about IS_REACT_ACT_ENVIRONMENT global
      typeof IS_REACT_ACT_ENVIRONMENT !== 'undefined'
        ? // $FlowFixMe[cannot-resolve-name]
          IS_REACT_ACT_ENVIRONMENT
        : undefined;

    if (
      !isReactActEnvironmentGlobal &&
      ReactSharedInternals.actQueue !== null
    ) {
      // TODO: Include link to relevant documentation page.
      console.error(
        'The current testing environment is not configured to support ' +
          'act(...)',
      );
    }
    return isReactActEnvironmentGlobal;
  }
  return false;
}