Function mountClassInstance

docs/external/js/react-dom.development.js:13132–13193

(workInProgress, ctor, newProps, renderExpirationTime)

  function mountClassInstance(workInProgress, ctor, newProps, renderExpirationTime) {
    {
      checkClassInstance(workInProgress, ctor, newProps);
    }

    var instance = workInProgress.stateNode;
    instance.props = newProps;
    instance.state = workInProgress.memoizedState;
    instance.refs = emptyRefsObject;
    initializeUpdateQueue(workInProgress);
    var contextType = ctor.contextType;

    if (typeof contextType === 'object' && contextType !== null) {
      instance.context = readContext(contextType);
    } else {
      var unmaskedContext = getUnmaskedContext(workInProgress, ctor, true);
      instance.context = getMaskedContext(workInProgress, unmaskedContext);
    }

    {
      if (instance.state === newProps) {
        var componentName = getComponentName(ctor) || 'Component';

        if (!didWarnAboutDirectlyAssigningPropsToState.has(componentName)) {
          didWarnAboutDirectlyAssigningPropsToState.add(componentName);

          error('%s: It is not recommended to assign props directly to state ' + "because updates to props won't be reflected in state. " + 'In most cases, it is better to use props directly.', componentName);
        }
      }

      if (workInProgress.mode & StrictMode) {
        ReactStrictModeWarnings.recordLegacyContextWarning(workInProgress, instance);
      }

      {
        ReactStrictModeWarnings.recordUnsafeLifecycleWarnings(workInProgress, instance);
      }
    }

    processUpdateQueue(workInProgress, newProps, instance, renderExpirationTime);
    instance.state = workInProgress.memoizedState;
    var getDerivedStateFromProps = ctor.getDerivedStateFromProps;

    if (typeof getDerivedStateFromProps === 'function') {
      applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);
      instance.state = workInProgress.memoizedState;
    } // In order to support react-lifecycles-compat polyfilled components,
    // Unsafe lifecycles should not be invoked for components using the new APIs.


    if (typeof ctor.getDerivedStateFromProps !== 'function' && typeof instance.getSnapshotBeforeUpdate !== 'function' && (typeof instance.UNSAFE_componentWillMount === 'function' || typeof instance.componentWillMount === 'function')) {
      callComponentWillMount(workInProgress, instance); // If we had additional state updates during this life-cycle, let's
      // process them now.

      processUpdateQueue(workInProgress, newProps, instance, renderExpirationTime);
      instance.state = workInProgress.memoizedState;
    }