popup-info-box-external-stylesheet

// src/components/popup-info-box-external-stylesheet/index.hbs

<link rel="stylesheet" href="src/components/popup-info-box-external-stylesheet/index.css">

<form>
  <div>
    <label for="cvc">Enter your CVC <popup-info-external-stylesheet
        img="src/components/popup-info-box-external-stylesheet/img/alt.png"
        data-text="Your card validation code (CVC) is an extra security feature — it is the last 3 or 4 numbers on the back of your card.">
      </popup-info-external-stylesheet></label>
    <input type="text" id="cvc">
  </div>
</form>