javascript - 未捕获的不变违规 : DetailPage. render()

Question

出现以下错误

Uncaught Invariant Violation: DetailPage.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.

      import React from 'react';
      import DetailPage from './detail-page.jsx';

      RenderPageComponents() {
            debugger
            switch (this.state.consultantListPage) {
                case 'user-list':
                    return (
                        <div>
                            <h1>User List</h1>
                            <ConsultantList
                                ViewDetail={this.ViewDetail.bind(this) }
                                userList={this.state.userList}
                                consultantListPage={this.state.consultantListPage}
                                />
                        </div>);

                case 'user-detail':
                    return (
                         <div>
                           <DetailPage/>
                        </div>
                    );


                default:
                    break;
            }

        }

感谢任何解决此问题的帮助

Answer 1

在默认步骤中你必须返回null

default:
return null;