Function prepareToReadContext

docs/external/js/react-dom.development.js:12199–12218

(workInProgress, renderExpirationTime)

    }
  }
  function prepareToReadContext(workInProgress, renderExpirationTime) {
    currentlyRenderingFiber = workInProgress;
    lastContextDependency = null;
    lastContextWithAllBitsObserved = null;
    var dependencies = workInProgress.dependencies;

    if (dependencies !== null) {
      var firstContext = dependencies.firstContext;

      if (firstContext !== null) {
        if (dependencies.expirationTime >= renderExpirationTime) {
          // Context list has a pending update. Mark that this fiber performed work.
          markWorkInProgressReceivedUpdate();
        } // Reset the work-in-progress list


        dependencies.firstContext = null;
      }
    }
  }
  function readContext(context, observedBits) {
    {
      // This warning would fire if you read context inside a Hook like useMemo.