javascript – 如何在反应路由器的登录页面中隐藏导航栏

我想在登录页面中隐藏导航栏.

我实际上做到了,但我看不到其他页面的导航栏.

此代码是My App.jsx文件的一部分.

我在App的状态下创造了历史.当这个路径名为’/’或’/ login’时,我会隐藏导航栏.

有用！

但是我输入了id和密码,然后点击登录按钮,得到“成功”结果,导航到’/ main’.

我也看不到主要组件中的导航栏.

我该怎么办？请帮我.

抱歉我的英文短文.如果你无法理解我的问题,你可以发表评论.

constructor(props) {
  super(props);
  this.state = {
    isAlertOpen: false,
    history: createBrowserHistory(),
  };
  this.toggleAlert = this.toggleAlert.bind(this);
}

<BrowserRouter>
  <div className="App">
    {this.state.history.location.pathname === '/' || this.state.history.location.pathname === '/login' ? null
      : <Header toggleAlert={this.toggleAlert} />}
    <div className="container">
      {this.state.history.location.pathname === '/' || this.state.history.location.pathname === '/login' ? null
        : <Navbar />}
      <Route exact path="/" render={() => <Redirect to="/login" />} />
      <Route path="/login" component={Login} />
      <Route path="/main" component={Main} />
      <Route path="/user" component={User} />
      <Route path="/hw-setting" component={Setting} />
      <Route path="/hw-detail/:id" component={HwDetail} />
      <Route path="/gas-detail/:id" component={GasDetail} />
      {this.state.isAlertOpen ? <Alert /> : null}
    </div>
  </div>
</BrowserRouter>

login(event) {
  event.preventDefault();
  userService.login(this.state.id, this.state.password).subscribe(res => {
    if (res.result === 'success') {
      global.token = res.token;
      this.props.history.push('/main');
    } else {
      alert(`[ERROR CODE : ${res.statusCode}] ${res.msg}`);
    }
});

解决方法:

您可以以不同方式构造路由,以便Login组件没有Header Like

<BrowserRouter>
  <Switch>
  <div className="App">
    <Route exact path="/(login)" component={LoginContainer}/>
    <Route component={DefaultContainer}/>

  </div>
  </Switch>
</BrowserRouter>

const LoginContainer = () => (
  <div className="container">
    <Route exact path="/" render={() => <Redirect to="/login" />} />
    <Route path="/login" component={Login} />
  </div>
)


 const DefaultContainer = () => (
    <div>
    <Header toggleAlert={this.toggleAlert} />
    <div className="container">
      <Navbar />
      <Route path="/main" component={Main} />
      <Route path="/user" component={User} />
      <Route path="/hw-setting" component={Setting} />
      <Route path="/hw-detail/:id" component={HwDetail} />
      <Route path="/gas-detail/:id" component={GasDetail} />
      {this.state.isAlertOpen ? <Alert /> : null}
    </div>
    </div>
 )

标签：javascript,reactjs,react-router
来源： https://codeday.me/bug/20191004/1853018.html