Class Store

packages/react-devtools-shared/src/devtools/store.js:101–2089

 * ContextProviders can subscribe to the Store for specific things they want to provide.
 */
export default class Store extends EventEmitter<{
  backendVersion: [],
  collapseNodesByDefault: [],
  componentFilters: [],
  enableSuspenseTab: [],
  error: [Error],
  hookSettings: [$ReadOnly<DevToolsHookSettings>],
  hostInstanceSelected: [Element['id']],
  settingsUpdated: [$ReadOnly<DevToolsHookSettings>],
  mutated: [[Array<Element['id']>, Map<Element['id'], Element['id']>]],
  recordChangeDescriptions: [],
  roots: [],
  rootSupportsBasicProfiling: [],
  rootSupportsTimelineProfiling: [],
  suspenseTreeMutated: [[Map<SuspenseNode['id'], SuspenseNode['id']>]],
  supportsNativeStyleEditor: [],
  supportsReloadAndProfile: [],
  unsupportedBridgeProtocolDetected: [],
  unsupportedRendererVersionDetected: [],
}> {
  // If the backend version is new enough to report its (NPM) version, this is it.
  // This version may be displayed by the frontend for debugging purposes.
  _backendVersion: string | null = null;

  _bridge: FrontendBridge;

  // Computed whenever _errorsAndWarnings Map changes.
  _cachedComponentWithErrorCount: number = 0;
  _cachedComponentWithWarningCount: number = 0;
  _cachedErrorAndWarningTuples: ErrorAndWarningTuples | null = null;

  // Should new nodes be collapsed by default when added to the tree?
  _collapseNodesByDefault: boolean = true;

  _componentFilters: Array<ComponentFilter>;

  // Map of ID to number of recorded error and warning message IDs.
  _errorsAndWarnings: Map<
    Element['id'],
    {errorCount: number, warningCount: number},
  > = new Map();

  // At least one of the injected renderers contains (DEV only) owner metadata.
  _hasOwnerMetadata: boolean = false;

  // Map of ID to (mutable) Element.
  // Elements are mutated to avoid excessive cloning during tree updates.
  // The InspectedElement Suspense cache also relies on this mutability for its WeakMap usage.
  _idToElement: Map<Element['id'], Element> = new Map();

  _idToSuspense: Map<SuspenseNode['id'], SuspenseNode> = new Map();

  // Should the React Native style editor panel be shown?
  _isNativeStyleEditorSupported: boolean = false;

  _nativeStyleEditorValidAttributes: $ReadOnlyArray<string> | null = null;

  // Older backends don't support an explicit bridge protocol,