↓これは無理 <p class="cart-attribute__field"> <label for="your-name0">Your name</label> <input id="your-name0" type="text" name="attributes[Your name0]" value="{{ cart.attributes["Your name0"] }}"> </p> lineこれは行ける <p class="line-item-property__field"> <label for="your-name">Your name</label> <input id="your-name" type="text" name="properties[Your name]"> </p>