Utilizing *ngIf for Showing Elements Once Data is Completely Loaded

While working on my Angular 2 app, I encountered an issue with the pagination UI loading before the data arrives. This causes a visual glitch where the pagination components initially appear at the top of the page and then shift to the bottom once the data is populated. To address this issue, I plan to wrap the pagination div with an *ngIf statement so that the pagination components will only load when the data is available.

The data is stored in a variable called "records" and is looped through and processed by a paginate pipe in the view as shown below:

<tr *ngFor="let record of records | paginate: { id: 'customers', itemsPerPage: 15, currentPage: page, totalItems: customerCount }">

The pagination ui div structure is outlined here:

        <div *ngIf="" class="pagination">
            <pagination-controls class="paginator" (pageChange)="page = $event" id="customers"
                    maxSize="15"
                    directionLinks="true"
                    autoHide="true">
            </pagination-controls>
        </div>

I am unsure about what condition to pass to the *ngIf for evaluation in this scenario. I attempted using *ngIf="records", but it did not yield the desired outcome.

Answer №1

When working with the records variable, you can use

!!records && records.length>0
. It's important to remember that using !!records can help prevent null errors if the variable is null. However, if you know for sure that the variable is always initialized as an array from the start, you can skip using !!records altogether.

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