如何检查 ngIf 指令中 let i = index 的值

Question

I have a for loop.

<div *ngFor="let product of products;let i =index">
   <div *ngIf="'i' != 3>
   </div>
</div>

I am checking the value of i in my ngIf,so to show or to now show something. But it does not work.I have a third index in my products array but it does not work. Where is my mistake?

I tried also

<div *ngIf="i != 3">
   </div>

But without success

Answer 1

You dont have to put 'i' in string conotations in the *ngIf directive.

also you should use double equals : !== and not != .

<div *ngFor="let product of products;let i =index">
   <div *ngIf="i !== 3">
   </div>
</div>

EDIT: Also you should consider using <ng-container> for such procedures, to have a clear sepearation of concerns for semantics.

<ng-container *ngFor="let product of products;let i =index">
   <div *ngIf="i !== 3">
     this is product {{i}}
   </div>
</ng-container>