javascript - How to hide navbar in login page in react router

Question

I want to hide the navbar in a login page.

I did it actually, but I can't see the navbar on other pages.

This code is part of My App.jsx file.

I make history in App's state. And I hide navbar, when this pathname is '/' or '/login'.

It works!

But then I typed the ID and password, and clicked the login button, got 'success' result, and navigated to '/main'.

Now I can't see navbar in main component too.

How can I do this?

Sorry about my short english. If you can't understand my question, you can comment.

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}`);
    }
});

Answer 1

You could structure your Routes differently so that the Login component doesn't have the 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>
 )