use Switch ， Component unchanging

[zanjs]

<Switch>
<Route
    exact
    path={RoutePath.home}
    render={props => (
      <LazyRoute {...props} component={import("../components/home")} />
    )}
  />
<Route
  path={RoutePath.topics}
  render={props => (
    <LazyRoute {...props} component={import("../components/topics")} />
  )}
/>
<Route
  path={RoutePath.histtory}
  render={props => (
    <LazyRoute {...props} component={import("../components/history")} />
  )}
/>
<Route
  path={RoutePath.count}
  render={props => (
    <LazyRoute {...props} component={import("../components/count")} />
  )}
/>
<Route
  path={RoutePath.birds}
  render={props => (
    <LazyRoute {...props} component={import("../components/birds")} />
  )}
/>
<Route
  path={RoutePath.about}
  render={props => (
    <LazyRoute {...props} component={import("../components/about")} />
  )}
/>
<Route
    path={RoutePath.lazyRoute}
    render={props => (
      <LazyRoute {...props} component={import("../components/lazyRoute")} />
    )}
  />
<Route component={NotFound}/>
</Switch>