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HTML 

              
                <div class="container">
  <ul class="collapsible popout">
    <li>
      <div class="collapsible-header"><i class="material-icons">shopping_cart</i>Order</div>

      <div class="collapsible-body" id="order-body">
        <div class="container">
          <div class="row">
            <img class="responsive-img col m6 materialboxed" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/t-1671/mop.png" alt="Primo Mop" />
            <div class="col m5">
              <div class="card-panel blue-grey">
                <div class="card-content white-text">
                  <span class="card-title">Primo Mop</span>
                  <p>Quantity: 20<br>Price: $15.00 USD</p>
                </div>
              </div>
            </div>
          </div>
          <div class="row">
            <div class="card-panel blue-grey">
              <div class="card-content white-text center">
                <p>Subtotal: 300.00 USD<br>Shipping: $7.50 USD<br>Fees: $2.50 USD</p>
                <span class="card-title">Total: $310.00 USD</span>
              </div>
            </div>
          </div>
        </div>
      </div>
    </li>
    <li class="active">
      <div class="collapsible-header"><i class="material-icons">place</i>Address</div>
      <div class="collapsible-body row" id="address-body">
        <div class="row">
          <div class="col s12">
            <div class="card blue-grey">
              <div class="card-content white-text">
                <span class="card-title">Billing Address</span>
                <p>Enter the address associated with your card.</p>
              </div>
            </div>
          </div>
        </div>
        <div class="container">
          <form class="col s12">
            <div class="row">
              <div class="input-field col s12">
                <input placeholder="full name" id="full_name" type="text" class="validate">
                <label for="full_name">full name</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s12">
                <input placeholder="email" id="email" type="text" class="validate">
                <label for="email">email</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s6">
                <input placeholder="street address" id="street_address" type="text" class="validate">
                <label for="street_address">street address</label>
              </div>
              <div class="input-field col s6">
                <input placeholder="suite / apt." id="suite" type="text" class="validate">
                <label for="suite">suite / apt.</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s4">
                <input placeholder="city" id="city" type="text" class="validate">
                <label for="city">city</label>
              </div>
              <div class="input-field col s4">
                <input placeholder="state" id="state" type="text" class="validate">
                <label for="state">state</label>
              </div>
              <div class="input-field col s4">
                <input placeholder="zip" id="zip" type="text" class="validate">
                <label for="zip">zip</label>
              </div>
            </div>
          </form>
          <form action="#">
            <p>
              <label>
                <input type="checkbox" id="same" onclick="showMe('shipping-input')" />
                <span>Different from shipping address?</span>
              </label>
            </p>
          </form>
        </div>
        <form class="col s12" id="shipping-address">
          <div class="row">
            <div class="col s12">
              <div class="card blue-grey">
                <div class="card-content white-text">
                  <span class="card-title">Shipping Address</span>
                  <p>Enter the address where your order will be shipped.</p>
                </div>
              </div>
            </div>
          </div>
          <div class="container">
            <div class="row">
              <div class="input-field col s6">
                <input placeholder="first name" id="first_name" type="text" class="validate">
                <label for="first_name">first name</label>
              </div>
              <div class="input-field col s6">
                <input placeholder="last name" id="last_name" type="text" class="validate">
                <label for="last_name">last name</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s12">
                <input placeholder="email" id="emailS" type="text" class="validate">
                <label for="emailS">email</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s6">
                <input placeholder="street address" id="street_addressS" type="text" class="validate">
                <label for="street_addressS">street address</label>
              </div>
              <div class="input-field col s6">
                <input placeholder="suite / apt." id="suiteS" type="text" class="validate">
                <label for="suiteS">suite / apt.</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s4">
                <input placeholder="city" id="cityS" type="text" class="validate">
                <label for="cityS">city</label>
              </div>
              <div class="input-field col s4">
                <input placeholder="state" id="stateS" type="text" class="validate">
                <label for="stateS">state</label>
              </div>
              <div class="input-field col s4">
                <input placeholder="zip" id="zipS" type="text" class="validate">
                <label for="zipS">zip</label>
              </div>
            </div>
        </form>
      </div>
      <button class="btn waves-effect waves-light" type="submit" name="action" onclick="closeAddress(); openSubmit();">Next
        <i class="material-icons right">send</i>
      </button>
</div>
</li>
<li id="checkout">
  <div class="collapsible-header"><i class="material-icons">credit_card</i>Submit</div>
  <div class="collapsible-body" id="submit">
    <span>
      <div class="container">
        <div class="row">
          <img class="responsive-img" id="accepted-cards" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/t-1671/card-brands.png" border="0" alt="Accepted Cards" />
        </div>
        <div class="row">
          <div id="iframe-element"></div>
        </div>
        <div class="row">
          <button class="btn-large waves-effect waves-light col m2" type="submit" name="action" id="submit-credit-card-button">Submit
          <i class="material-icons right">send</i>
        </button>
          <div class="col s1"></div>
          <a onclick="openPlaid();"id="bank_light_box" class="#2196f3 blue waves-effect waves-light btn-large col m2 offset-m7"><i class="material-icons right">account_balance</i>use ACH</a>
        </div>
        <div class="row">
          <div class="card blue-grey lighten-2">
            <div class="card-content white-text">
              <p>By clicking submit, you agree to Mop Emporium's <a href="#">refund, cancellation, and return</a> policy.<br>Orders will be shipped in 2-3 business days, at which time tracking information will be provided in a confirmation email.</p>
            </div>
          </div>
        </div>
      </div>
    </span>
  </div>
</li>
</ul>
<div class="row">
  <div id="token"></div>
  <div id="tokenBank"></div>
  <div class="row">
    <div id="complete-screen" class="row">
      <div class="col s12 m12">
        <div class="card blue-grey darken-1">
          <div class="card-content white-text">
            <span class="card-title">Your order is complete!</span>
            <p>We're working on getting your order ready to ship. Once it does, you can log in and track it here.<br><br><br><br><br></p>
          </div>
          <div class="card-action">
            <a href="#">Track your order</a>
            <a href="#">Help</a>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                #shipping-address {
  display: none;
}

#complete-screen {
  display: none;
}
!

JS 

              
                //insert your app ID
var appId = 601904;

document.addEventListener("DOMContentLoaded", function () {
  // initialize materialize collapsible
  var collapsibleElement = document.querySelector(".collapsible");
  var collapsibleInstance = M.Collapsible.init(collapsibleElement);

  // initialize materialize material box
  var materialBox = document.querySelectorAll(".materialboxed");
  var instances = M.Materialbox.init(materialBox);
});
// show shipping address if different
function showMe() {
  var box = document.getElementById("same");
  var vis = box.checked ? "block" : "none";
  document.getElementById("shipping-address").style.display = vis;
}
// close address section on "next" click
function closeAddress() {
  var elems = document.querySelector(".collapsible");
  var instances = M.Collapsible.init(elems);
  instances.close(1);
}
// open submit section on "next" click
function openSubmit() {
  var elems = document.querySelector(".collapsible");
  var instances = M.Collapsible.init(elems);
  instances.open(2);
}

function openPlaid() {
  WePay.set_endpoint("stage");
  document.getElementById('bank_popup');
    response = WePay.bank_account.create({
      'client_id': appId,
      'email': document.getElementById("email").value,
      "options": {
        "avoidMicrodeposits": true
      }
    },
    function(data) {
        console.log(data);
      
      //close checkout section
      var elems = document.querySelector('.collapsible');
      var instances = M.Collapsible.init(elems);
      instances.close(2);
      
      //display the response for testing -- remove in production
      var node = document.createElement('div');
        node.innerHTML = ("bank_account_id: " + data["bank_account_id"]);
        document.getElementById('token').appendChild(node);
      
      //show complete message
      document.getElementById('complete-screen').style.display = "block";
      }
    );
};

// credit card iframe styling
var custom_style = {
  "styles": {
    "base": {
      "color": "grey",
      "border": "1px solid grey",
      "border-top": "none",
      "border-right": "none",
      "border-left": "none",
      "font-weight": "200",
      "font-family": "Arial",
      "padding": "0px",
      "margin-bottom": "5px",
      ":focus": {
        "border": "2px solid #4db6ac",
        "border-top": "none",
        "border-right": "none",
        "border-left": "none"
      },
      "::placeholder": {
        "text-transform": "lowercase",
        "color": "#D3D3D3",
        "font-size": "17px"
      }
    },
    "invalid": {
      "color": "#CD5C5C",
      "border-color": "#CD5C5C"
    },
    "valid": {
      "color": "#4db6ac",
      "border-color": "#4db6ac"
    },
    "labels": {
      "base": {
        "color": "gray",
        "font-family": "Arial",
        "font-size": "13px",
        "font-weight": "1",
        "text-transform": "lowercase",
        "padding": "0px",
        "padding-left": "0px"
      }
    },
    "errors": {
      "invalid": {
        "color": "#CD5C5C"
      }
    }
  }
};
var options = {
  custom_style: custom_style
};

//credit card iframe configs
WePay.set_endpoint("stage");
var iframe_container_id = "iframe-element";
var creditCard = WePay.createCreditCardIframe("iframe-element", options);

if (creditCard.error_code) {
  console.log("error", creditCard);
}

document
  .getElementById("submit-credit-card-button")
  .addEventListener("click", function (event) {
    creditCard.tokenize(
      {
        "client_id": appId,
        "user_name": document.getElementById("zip").value,
        "email": document.getElementById("email").value,
        "address": {
          "postal_code": document.getElementById("zip").value
        }
      },
      function (response) {
        if (response.error) {
          // error will have error message which explains why submitToken is not be able to generate token
          console.log(response);
        } else {
          // response will has credit card token if all the user information are valid
          console.log(response);
        }
        // display the response on the page for testing purposes; do not launch with this section
        var node = document.createElement('div');
        node.innerHTML = JSON.stringify(response);
        document.getElementById('token').appendChild(node);
      }
    )
  });
!
999px

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