Using a modulus operator in Angular 6 to conditionally show elements

Trying to achieve a specific layout for an object in an array using ng-For and ng-If. Here is the desired recovery code, and here's what I've attempted so far in my code snippet enter image description here:

<div class="recovery-code" *ngFor="let x of recoveryCode?.recoveryCodes; let i = index;">
            <b>{{ x }}</b>
            <br *ngIf="i%5 === 0">
</div>

I'm encountering issues trying to add space between the elements of the array. I have attempted using array.join(", "); but it hasn't worked as expected. Any advice on how to solve this problem would be greatly appreciated.

angulartypescriptangular-materialangular6

Answer №1

Your *ngFor is not targeting the correct item, causing it to repeat the div instead of the desired content. To resolve this issue, try utilizing the code snippet provided below. This adjustment will achieve the intended recovery code display format you are seeking.

ng-container proves to be an effective solution for addressing such scenarios as it ensures no residual DOM elements are left behind. For more insights, refer to https://angular.io/guide/structural-directives#ng-container-to-the-rescue

<div class="recovery-code">
    <ng-container *ngFor="let x of recoveryCode?.recoveryCodes; let i = index;">
        <br *ngIf="i > 0 && i%5 === 0" />
        <b>{{ x }}</b>&nbsp;
    </ng-container>
</div>

The expected output should resemble the following:

11111 22222 33333 44444 55555
11111 22222 33333 44444 55555
11111 22222 33333 44444 55555

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