Determine the count of iterations in Angular 2 using *ngFor

I am trying to determine the number of iterations in ngFor in order to control the visibility of elements. For example, I want to stop iterating when a certain number is reached. The current template looks like this:

<p *ngIf = "heros2.length > 3"> 
    There are too many users
</p>
<div *ngIf = "heros2.length == 3">
<ul>
<li *ngFor = 'let hero1 of heros2'>
There are many users
{{hero1.name}}
</li>
</ul>
</div>

Answer №1

Here is the correct syntax to use:

*ngFor="let item of list; let index=index"

You can find more information in the official documentation

Answer №2

To find the position of an item in an ngFor loop, you can utilize

*ngFor="let element of elements; let i=index"
, with "i" representing the current index. One approach to limit the iteration is by using a Python method to generate an array with the exact number of elements to be iterated:

<div *ngFor="let element of range(6); let i=index">
    {{ elements[i].name }}
</div>

The range function creates an array with 6 slots, enabling you to iterate through the elements a specified number of times.

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