How to avoid input field flip/shakable issue on type of anything?

code:

<pre><input maxlength="10" type="text" id="reserveQty" [ngClass]="{'invalid':(!data.priceUnitQuantity || data.priceUnitQuantity == 0)}" 
                    class="sh-input-border form-control item-tile-quantity qty shopping-cart-line-item-quantity-input"
                    autocomplete="off" type="text"  [ngModel]="data.priceUnitQuantity | number:'1.0'" (ngModelChange)="countItemPrice(data,$event)"/>