Display or conceal a button in Angular 6 based on certain conditions

In my current project, I am facing a challenge where I need to disable a button while a task is running and then activate it once the task is complete. Specifically, I want a syncing icon to spin when the task status is 'In_progress' and then hide the spinner and enable the 'AutoCode Sync' button when the status changes to 'Completed'. I have tried implementing this functionality using the following code:

<section *ngFor="let task of tasksRes">
    <nav>
        <span class="text-warning" *ngIf="task?.status == 'In_progress'"><i class="fa fa-spinner fa-spin"></i></span> 
    </nav>

    <div class="pull-right">
        <button mat-raised-button color="primary" (click)="open();" class="btn-w-md">
        AutoCode Sync
        </button>
    </div>
</section>

I would appreciate any help or suggestions on how to successfully achieve this functionality. Thank you.

javascriptangulartypescript

Answer №1

To display or hide the button based on a condition (status === Completed), utilize ngIf

<div class="pull-right">
    <button mat-raised-button color="primary" (click)="open();" class="btn-w-md" *ngIf="task?.status == 'Completed'">
    Sync AutoCode
    </button>
</div>

Answer №2

If you utilize the [hidden] property on both the spinner and button, it is possible to control their visibility. However, there seems to be confusion about why the *ngFor="let task of tasksRes" is being used. Are you expecting multiple buttons and spinners to appear?

<section *ngFor="let task of tasksRes">
    <nav [hidden]="task?.status == 'Completed'">
        <span class="text-warning" *ngIf="task?.status == 'In_progress'"><i class="fa fa-spinner fa-spin"></i></span> 
    </nav>

    <div class="pull-right" [hidden]="task?.status == 'In_progress'">
        <button mat-raised-button color="primary" (click)="open();" class="btn-w-md">
        AutoCode Sync
        </button>
    </div>
</section>

This functionality acts as a toggle that dynamically displays or hides the button based on a condition.

An alternative approach would be to introduce a separate true/false property and evaluate it according to your specific criteria - give it a try and happy coding!

Answer №3

To include a document attribute in angular, use the syntax [attr.{{attribute}}].

<div class="pull-right">
    <button mat-raised-button [attr.disabled]="task?.status == your_situation" color="primary" (click)="open();" class="btn-w-md">
    AutoCode Sync
    </button>
</div>

Answer №4

Learn how to enable the button based on a specific condition using [disabled]

<button mat-raised-button color="primary" (click)="open();" class="btn-w-md" [disabled]="task?.status == 'In_progress'">
        AutoCode Sync
</button>

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