I have a form which takes the user's credit card information, all this is being validated by an e-commerce API. I have other fields in the form such as name, address. I am able to validate the names and address, but since the input of the credit card information is being validated by back-end. Is their a way for me to disable the button until all fields are completed?

```
<div class="medium-6 columns" *ngIf="!isLoading else updateLoading">
     <button class="saves" (click)="onSave()" aria-label="Save user info" 
     [disabled]="!editForm.valid">Save</button>
</div>

```