<input 
  type="number" 
  value="0" 
  min="0" 
  max="10" 
  step="2">

External CSS

  1. https://tim-montmorency.com/timdoc/shared/styles/codepen.css
  2. https://tim-montmorency.com/timdoc/shared/styles/codepen-form.css

External JavaScript

This Pen doesn't use any external JavaScript resources.