Dynamic routerLink value from ngFor item giving error "Got interpolation ({{}}) where expression was expected"

I'm trying to set the routerLink value in a directive based on a dynamic set of items from the component. But an error is being thrown from Angular2:

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>

You can't use [] combined with {{}} either the former or the later

[routerLink]="item.routerLink"

Should do what you want.

routerLink="{{item.routerLink}}"

would bind item.routerLink.toString() to the routerLink property.

You may also go with the following code to pass expression with some text.

<div *ngFor="let customer of customers">
   <a [routerLink]="'customer/'+customer.index">Link</a>
</div>

Something like this worked for us:

<input type="checkbox" [id]="['btn.botStepState-'+i]" [(ngModel)]="btn.botStepState" name="btn.botStepState-{{i}}" (change)="changeHandler($event)" class="cbx hidden" />

• Property binding i.e. [] required [] to evaluate values
• Model binding i.e. [()] required nothing special
• Interpolation i.e. {{}} could be used with general attributes
• Event binding i.e. () worked great with functions