Angular 使用ng模板为儿童重复html
我认为这很简单,但由于某种原因我无法理解。 我正在构建一个简单的子菜单。我已经创建了组件:Angular 使用ng模板为儿童重复html,angular,ng-template,Angular,Ng Template,我认为这很简单,但由于某种原因我无法理解。 我正在构建一个简单的子菜单。我已经创建了组件: export class SubMenuComponent implements OnInit { @Input() links: MenuItem[]; constructor() {} ngOnInit(): void {} } 菜单项如下所示: export class MenuItem { label: string; path: string;
export class SubMenuComponent implements OnInit {
@Input() links: MenuItem[];
constructor() {}
ngOnInit(): void {}
}
菜单项如下所示:
export class MenuItem {
label: string;
path: string;
open: boolean;
children?: MenuItem[];
}
<ul class="app-sub-menu list-unstyled">
<li *ngFor="let link of links" routerLinkActive="active"><a class="btn-link" [routerLink]="link.path"
routerLinkActive="active" [routerLinkActiveOptions]="{exact: link.path === '/'}">{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<li *ngFor="let link of link.children" routerLinkActive="active"><a class="btn-link"
routerLinkActive="active" [routerLink]="link.path" #link>{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<li *ngFor="let link of link.children" routerLinkActive="active"><a class="btn-link"
routerLinkActive="active" [routerLink]="link.path">{{ link.label }}</a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
Html如下所示:
export class MenuItem {
label: string;
path: string;
open: boolean;
children?: MenuItem[];
}
<ul class="app-sub-menu list-unstyled">
<li *ngFor="let link of links" routerLinkActive="active"><a class="btn-link" [routerLink]="link.path"
routerLinkActive="active" [routerLinkActiveOptions]="{exact: link.path === '/'}">{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<li *ngFor="let link of link.children" routerLinkActive="active"><a class="btn-link"
routerLinkActive="active" [routerLink]="link.path" #link>{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<li *ngFor="let link of link.children" routerLinkActive="active"><a class="btn-link"
routerLinkActive="active" [routerLink]="link.path">{{ link.label }}</a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
-
看起来我使用的模板不正确,因此我将其更改为:
<ul class="app-sub-menu list-unstyled">
<ng-container *ngTemplateOutlet="link; context: { $implicit: links }"></ng-container>
</ul>
<ng-template #link let-links>
<li *ngFor="let link of links" routerLinkActive="active"><a class="btn-link" [routerLink]="link.path"
routerLinkActive="active" [routerLinkActiveOptions]="{exact: link.path === '/'}">{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<ng-container *ngTemplateOutlet="link; context: { $implicit: link.children }"></ng-container>
</ul>
</li>
</ng-template>
<ul class="app-sub-menu list-unstyled">
<ng-template #nestedList let-links>
<li *ngFor="let link of links" routerLinkActive="active"><a class="btn-link" [routerLink]="link.path"
routerLinkActive="active" [routerLinkActiveOptions]="{exact: link.path === '/'}">{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<ng-container *ngTemplateOutlet="nestedList; context: { $implicit: link.children }"></ng-container>
</ul>
</li>
</ng-template>
<ng-container *ngTemplateOutlet="nestedList; context: { $implicit: links }"></ng-container>
</ul>
- {{link.label}
键盘箭头向下
键盘箭头向上
但我仍然得到了错误:(
templateRef.createEmbeddedView不是函数
我明白了,这是因为我的模板id与实际模型相同。因此我将其更改为:
<ul class="app-sub-menu list-unstyled">
<ng-container *ngTemplateOutlet="link; context: { $implicit: links }"></ng-container>
</ul>
<ng-template #link let-links>
<li *ngFor="let link of links" routerLinkActive="active"><a class="btn-link" [routerLink]="link.path"
routerLinkActive="active" [routerLinkActiveOptions]="{exact: link.path === '/'}">{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<ng-container *ngTemplateOutlet="link; context: { $implicit: link.children }"></ng-container>
</ul>
</li>
</ng-template>
<ul class="app-sub-menu list-unstyled">
<ng-template #nestedList let-links>
<li *ngFor="let link of links" routerLinkActive="active"><a class="btn-link" [routerLink]="link.path"
routerLinkActive="active" [routerLinkActiveOptions]="{exact: link.path === '/'}">{{ link.label }}</a>
<span class="toggle" *ngIf="link.children?.length" (click)="link.open = !link.open">
<mat-icon *ngIf="link.isActive || link.open">keyboard_arrow_down</mat-icon>
<mat-icon *ngIf="!link.isActive && !link.open">keyboard_arrow_up</mat-icon>
</span>
<ul class="list-unstyled" [class.open]="link.open" *ngIf="link.children?.length">
<ng-container *ngTemplateOutlet="nestedList; context: { $implicit: link.children }"></ng-container>
</ul>
</li>
</ng-template>
<ng-container *ngTemplateOutlet="nestedList; context: { $implicit: links }"></ng-container>
</ul>
- {{link.label}
键盘箭头向下
键盘箭头向上