Validation on input fields in popup and view of popup Ionic
<p>I am creating Cordova Ionic app. How can I apply validations on Input fields in popup. I have two fields: Width and Height. I want to apply validation on both the fields. </p>

<p>Validations will be:</p>

<p>Min value : 10 mm<br>
Max Value : 1000 mm</p>

<p>Also I'm not aware why the view of popup is like this (image given below of Android tablet). The input field is not shown. The buttons are gone when keyboard is open. </p>

<p>When keyboard is not open :</p>

<p><a href="https://i.stack.imgur.com/fPfKz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fPfKz.png" alt="enter image description here"></a></p>

<p>When keyboard is open :</p>

<p><a href="https://i.stack.imgur.com/NCCu5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NCCu5.png" alt="enter image description here"></a></p>