AngularJS自定义验证不适用于表达式

Question

I am using below code to validate my Quantity text box. when i enter wrong number it's showing error message, but the form is submitting.

<span ng-show="model.Item.Quantity - model.Quantity < 0">Entered Quantity cannot be greater than the item quantity.</span>

Answer 1

use the following way :

<form name="formName">
    <input type="number" min="0" max="{{itemQuantity}}" name="inputName" ng-model="propertyName" />
    <span ng-show="formName.inputName.$invalid">Error Message </span>
    <button type="submit" ng-disabled="formName.$invalid" value="submit" />
</form>

You can find more info here : https://docs.angularjs.org/api/ng/input/input[number]