angular - 来自 ngFor 项目的动态 routerLink 值给出错误 "Got interpolation ({{}}) where expression was expected"

Question

我正在尝试根据组件中的一组动态项在指令中设置 routerLink 值。但是 Angular2 抛出了一个错误:

EXCEPTION: Template parse errors:
Parser Error: Got interpolation ({{}}) where expression was expected at column 1 in [ {{item.routerLink}} ] in AppHeader@5:40 ("
    <a *ngFor="let item of headerItems" [ERROR ->][routerLink]=" {{item.routerLink}} ">
      {{item.text}}
    </a>
"): Header@5:40

header.component.ts

import {Component} from '@angular/core';
import {ROUTER_DIRECTIVES} from '@angular/router-deprecated';

@Component({
  selector: 'app-header',
  templateUrl: './app/components/header/header.component.html',
  directives: [ROUTER_DIRECTIVES]
})
export class AppHeader {
  headerItems: Object[] = [];

  constructor() {
    this.headerItems.push(
      { classes: 'navLink', routerLink: ['/Home'], text: 'Home' }
    );
  }
}

header.component.html

<div id="HeaderRegion">
  <nav class="nav">
    <a *ngFor="let item of headerItems" [routerLink]=" {{item.routerLink}} ">
      {{item.text}}
    </a>
  </nav>
</div>

Answer 1

您不能将 [] 与 {{}} 结合使用，无论是前者还是后者

[routerLink]="item.routerLink"

应该做你想做的。

routerLink="{{item.routerLink}}"

会将 item.routerLink.toString() 绑定(bind)到 routerLink 属性。