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Mistu
Mistu

Reputation: 154

Add unique value to each iterate element HTML Angular 2

I have a problem with Angular 2. I want to made List HTML like this:

<ul>
   <li>
   <li>..
</ul>

With links but I don't know how to add iterate argument to HTML object in NG2. It is my code:

<ul>
    <li   *ngFor="let item of geoNames | filterBy: userFilter" 
                   (click)="showNameG= !showNameG" >
        <a>{{ item.name }}</a>
    </li>
</ul>

<div *ngIf="showNazwyG">
     <show-NameG></show-NameG>
</div>

And I want to add a different name to each of the element li to recognize from has been clicked. In AngularJS worked something like this:

(click)="showNameG{{index}}= !showNameG{{index}}"

Upvotes: 3

Views: 867

Answers (3)

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 657158

*ngFor provides an index context variable

<li *ngFor="let item of geoNames | filterBy: userFilter; let i=index"
    (click)="showNameG[i]= !showNameG[i]" ><a>{{ item.name }}</a></li>

update

<li *ngFor="let item of geoNames | filterBy: userFilter; let i=index"
    (click)="self['showNameG'] + i = !self['showNameG']" ><a>{{ item.name }}</a></li>

export class MyComponent {
  get self() { 
    return this;
  }  
}

Upvotes: 4

Gregor Doroschenko
Gregor Doroschenko

Reputation: 11696

You must add following to your *ngFor:

let index = index;

At the end you should have this:

<ul>
  <li   *ngFor="let item of geoNames | filterBy: userFilter; let index = index;" (click)="showNameG[index] = !showNameG[index]" ><a>{{ item.name }}</a></li>
</ul>

Here is good description of *ngFor: https://angular.io/docs/ts/latest/api/common/index/NgFor-directive.html

Upvotes: 0

Satpal
Satpal

Reputation: 133403

Use item, create a property showNameG and toggle its value

<li *ngFor="let item of geoNames | filterBy: userFilter" (click)="item.showNameG=!item.showNameG" ></li>

Upvotes: 1

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