Function callComponentWillMount

packages/react-server/src/ReactFizzClassComponent.js:544–584

(type: any, instance: any)

}

function callComponentWillMount(type: any, instance: any) {
  const oldState = instance.state;

  if (typeof instance.componentWillMount === 'function') {
    if (__DEV__) {
      if (instance.componentWillMount.__suppressDeprecationWarning !== true) {
        const componentName = getComponentNameFromType(type) || 'Unknown';

        if (!didWarnAboutDeprecatedWillMount[componentName]) {
          console.warn(
            // keep this warning in sync with ReactStrictModeWarning.js
            'componentWillMount has been renamed, and is not recommended for use. ' +
              'See https://react.dev/link/unsafe-component-lifecycles for details.\n\n' +
              '* Move code from componentWillMount to componentDidMount (preferred in most cases) ' +
              'or the constructor.\n' +
              '\nPlease update the following components: %s',
            componentName,
          );
          didWarnAboutDeprecatedWillMount[componentName] = true;
        }
      }
    }

    instance.componentWillMount();
  }
  if (typeof instance.UNSAFE_componentWillMount === 'function') {
    instance.UNSAFE_componentWillMount();
  }

  if (oldState !== instance.state) {
    if (__DEV__) {
      console.error(
        '%s.componentWillMount(): Assigning directly to this.state is ' +
          "deprecated (except inside a component's " +
          'constructor). Use setState instead.',
        getComponentNameFromType(type) || 'Component',
      );
    }
    classComponentUpdater.enqueueReplaceState(instance, instance.state, null);
  }
}

function processUpdateQueue(
  internalInstance: InternalInstance,