Function validateFunctionComponentInDev

dash/deps/react-dom@18.3.1.js:20206–20266

(workInProgress, Component)

  }

  function validateFunctionComponentInDev(workInProgress, Component) {
    {
      if (Component) {
        if (Component.childContextTypes) {
          error('%s(...): childContextTypes cannot be defined on a function component.', Component.displayName || Component.name || 'Component');
        }
      }

      if (workInProgress.ref !== null) {
        var info = '';
        var ownerName = getCurrentFiberOwnerNameInDevOrNull();

        if (ownerName) {
          info += '\n\nCheck the render method of `' + ownerName + '`.';
        }

        var warningKey = ownerName || '';
        var debugSource = workInProgress._debugSource;

        if (debugSource) {
          warningKey = debugSource.fileName + ':' + debugSource.lineNumber;
        }

        if (!didWarnAboutFunctionRefs[warningKey]) {
          didWarnAboutFunctionRefs[warningKey] = true;

          error('Function components cannot be given refs. ' + 'Attempts to access this ref will fail. ' + 'Did you mean to use React.forwardRef()?%s', info);
        }
      }

      if ( Component.defaultProps !== undefined) {
        var componentName = getComponentNameFromType(Component) || 'Unknown';

        if (!didWarnAboutDefaultPropsOnFunctionComponent[componentName]) {
          error('%s: Support for defaultProps will be removed from function components ' + 'in a future major release. Use JavaScript default parameters instead.', componentName);

          didWarnAboutDefaultPropsOnFunctionComponent[componentName] = true;
        }
      }

      if (typeof Component.getDerivedStateFromProps === 'function') {
        var _componentName3 = getComponentNameFromType(Component) || 'Unknown';

        if (!didWarnAboutGetDerivedStateOnFunctionComponent[_componentName3]) {
          error('%s: Function components do not support getDerivedStateFromProps.', _componentName3);

          didWarnAboutGetDerivedStateOnFunctionComponent[_componentName3] = true;
        }
      }

      if (typeof Component.contextType === 'object' && Component.contextType !== null) {
        var _componentName4 = getComponentNameFromType(Component) || 'Unknown';

        if (!didWarnAboutContextTypeOnFunctionComponent[_componentName4]) {
          error('%s: Function components do not support contextType.', _componentName4);

          didWarnAboutContextTypeOnFunctionComponent[_componentName4] = true;
        }