How to Insert Custom Fields into Your Shopify Contact Form - eCommerce Thesis

How to Insert Custom Fields into Your Shopify Contact Form

<div class="field order-number">
    <input
      type="text"
      id="order-number"
      class="field__input"
      autocomplete="tel"
      name="contact[order_number]"
      placeholder="Order number"
    >
    <label class="field__label" for="order-number">Order number</label>
  </div>