问题
The following is what is included in my app.component.html
<lmenu></lmenu>
<header></header>
<router-outlet></router-outlet>
<footer></footer>
However my login and register pages are both rendered through this module and they only require the router-outlet. How an dynamically not include the lmenu, header, and footer selectors for the login and register views? Thanks in advance.
回答1:
<lmenu *ngIf="isLogin"></lmenu>
<header *ngIf="isLogin"></header>
<router-outlet></router-outlet>
<footer *ngIf="isLogin"></footer>
Just switching isLogin between true and false shows/hides the components
回答2:
you could use two times in the terminal:
- ng generate component header
- ng generate component footer
then, in the main app file HTML (app.component.html) you must include the 2 tags:
<app-header></app-header>
<app-footer></app-footer>
this is the first thing to do.
Then you must populate your templates:
- header.component.html and the styling in header.component.css
- footer.component.html and the styling in footer.component.css
来源：https://stackoverflow.com/questions/42492687/angular-2-dynamic-page-header-and-footer