Function checkForUpdates

packages/react-devtools-shared/src/devtools/views/hooks.js:312–332

()

    let didUnsubscribe = false;

    const checkForUpdates = () => {
      if (didUnsubscribe) {
        return;
      }

      setState(prevState => {
        if (
          prevState.getCurrentValue !== getCurrentValue ||
          prevState.subscribe !== subscribe
        ) {
          return prevState;
        }

        const value = getCurrentValue();
        if (prevState.value === value) {
          return prevState;
        }

        return {...prevState, value};
      });
    };
    const unsubscribe = subscribe(checkForUpdates);

    checkForUpdates();