How to apply multiple template bindings on one element in angular [duplicate]

I'm using template like following:

<ul [ngClass]="{dispN: !shwFilter,'list-group':true,'autoS':true,'dispB':shwFilter,'myshddw':true}"> <li *ngIf="itsNotF && itsNotF.length" [ngClass]="{bgDFF: !colps[j],'list-group-item':true}" *ngFor="let valm1 of itsNotF;let j=index;" (click)="togFltr(j)"> <div *ngIf="valm1 && valm1.type=='1'"> <h5>{{valm1['header']}}</h5> <p>{{valm1['body']}}</p> <h6>{{valm1['note']}}</h6> </div> <div *ngIf="valm1 && valm1.type=='2'" (click)="modlTxt=valm1;notREadVu(j)"> <h5>{{valm1['header']}}</h5> <h6>{{valm1['note']}}</h6> </div> <div *ngIf="valm1 && valm1.type=='3'"> <h5>{{valm1['header']}}</h5> <p>{{valm1['body']}}</p> <h6>{{valm1['note']}}</h6> </div> </li> <li [ngClass]="{bgDFF: !colps[j],'list-group-item':true,'lgOt':true}" (click)="logout()"> <span>Log Out <i></i></span> </li>
</ul>

So it gives following error:

EXCEPTION: Template parse errors:
Can't have multiple template bindings on one element. Use only one attribute named 'template' or prefixed with * ("one"> <li *ngIf="itsNotF && itsNotF.length" [ngClass]="{bgDFF: !colps[j],'list-group-item':true}" [ERROR ->]*ngFor="let valm1 of itsNotF;let j=index;" (click)="togFltr(j)">
"): App@78:94

Previously it was not giving error I faced this issue after upgrading to RC4.

So what's workaround, so I can apply multiple template binding on single element without altering Template structure.

2

4 Answers

Can't use two template binding on one element in Angular 2 (like *ngIf and *ngFor). But you can achieve the same by wrapping the element with a span or any other element. It is good to append with an <ng-container> as it is a logical container and it will not get append to the DOM. For example,

<ng-container *ngIf="condition"> <li *ngFor="let item of items"> {{item}} </li>
</ng-container>

2

You can use the following (expanded version) to preserve the document structure (e.g. for your css selectors):

<template [ngIf]="itsNotF && itsNotF.length"> <div [ngClass]="{bgDFF: !colps[j],'list-group-item':true}" *ngFor="let valm1 of itsNotF;let j=index;" (click)="togFltr(j)"> </div>
</template>

0

Put your *ngIf in a parent div, and the *ngFor can stay where it is.

For example:

<div *ngIf="itsNotF && itsNotF.length"> <div [ngClass]="{bgDFF: !colps[j],'list-group-item':true}" *ngFor="let valm1 of itsNotF;let j=index;" (click)="togFltr(j)"> </div>
</div>

7

If you are using *ngFor and want to add *ngIf to check some field, if conditional is not too complicated, I use filter for that, where I run my conditional and return only items that enter in my condition inside that loop.. Hope it helps

something like that where I want to show only items with description:

<div *ngFor="let payment of cart.restaurant.payment_method | filter:[{short_name: cart.payment_method}] | onlyDescription" text-wrap> <ion-icon item-left name="information-circle"></ion-icon> {{payment.pivot.description}} </div>

davor

1