In your main component html you can add the following routes outlet which you will use to switch layout.
<router-outlet name="header"></router-outlet>
<router-outlet name="navbar"></router-outlet>
<router-outlet></router-outlet>
<router-outlet name="footer"></router-outlet>
In this case you can configure your routes to switch the header, navbar if any and footer of your app when page changes. The following is an example of how you can configure your routes.
Example 1
Lets assume the first layout has only header and footer without any sidebar/navbar
export const welcome_routes: RouterConfig = [
{ path: 'firstpage', children:[
{ path: 'login', component: LoginComponent},
{ path: 'signup', component: SignupComponent},
{ path: '' , component: Header1Component, outlet: 'header'}
{ path: '' , component: Footer1Component, outlet: 'footer'}
]}
];
Example 2.
This is your routes config for your second layout
export const next_layout_routes: RouterConfig = [
{ path: 'go-to-next-layout-page', children:[
{ path: 'home', component: HomeComponent},
{ path: '' , component: Header2Component, outlet: 'header'}
{ path: '' , component: NavBar2Component, outlet: 'navbar'}
{ path: '' , component: Footer2Component, outlet: 'footer'}
]}
];
With this its very easy to add a third and a fourth and a ... layout to your page.
Hope this helps
** Updated **
RouterConfig has been changed to Routes.
So the code above will now be
export const welcome_routes: Routes = [
{ path: 'firstpage', children:[
{ path: 'login', component: LoginComponent},
{ path: 'signup', component: SignupComponent},
{ path: '' , component: Header1Component, outlet: 'header'}
{ path: '' , component: Footer1Component, outlet: 'footer'}
]}
];