title: Opening numeric keypad for text field
body: <p>I am using Ionic framework 2.2.1. I have a text input field for which, in almost 99% case, the input value will be a number. So I would like to open a numeric keypad when a user focuses on this field. Is there any way to do this?</p>
  
  <p>I have tried <code>&lt;input type="text" pattern="\d*"&gt;</code> and it's not working. I also can't use <code>&lt;input type="tel"&gt;</code> or <code>&lt;input type="number"&gt;</code> since the value can have alphabetic characters too.</p>