Scheme does not have a registered handler

[monkz88]

I'm trying to implement swup into a Shopify theme.

I followed the guide https://swup.js.org/getting-started/example

Now, when switching pages, the screen correctly fades over to white but then it gets stuck in this mode forever.

In the console, it gives this error:
Failed to launch 'typeerror:%20Cannot%20set%20properties%20of%20null%20(setting%20'outerHTML')' because the scheme does not have a registered handler.

Any tips how to solve this?

[daun]

I would guess that not all of your pages have the swup container #swup. To get further help you'll have to provide the code you're using, ideally by forking this sandbox and recreating the issue there.

[monkz88]

Thank you. All the pages are rendered in this theme.liquid file, where I've added it to the body tag. Then each page gets this the transition-fade effect.

{%- if settings.favicon != blank -%}
  <link rel="icon" type="image/png" href="{{ settings.favicon | image_url: width: 32, height: 32 }}">
{%- endif -%}

{%- unless settings.type_header_font.system? and settings.type_body_font.system? -%}
  <link rel="preconnect" href="https://fonts.shopifycdn.com" crossorigin>
{%- endunless -%}

<title>
  {{ page_title }}
  {%- if current_tags %} &ndash; tagged "{{ current_tags | join: ', ' }}"{% endif -%}
  {%- if current_page != 1 %} &ndash; Page {{ current_page }}{% endif -%}
  {%- unless page_title contains shop.name %} &ndash; {{ shop.name }}{% endunless -%}
</title>

{% if page_description %}
  <meta name="description" content="{{ page_description | escape }}">
{% endif %}

{% render 'meta-tags' %}

<script src="{{ 'global.js' | asset_url }}" defer="defer"></script>
{{ content_for_header }}

{%- liquid
  assign body_font_bold = settings.type_body_font | font_modify: 'weight', 'bold'
  assign body_font_italic = settings.type_body_font | font_modify: 'style', 'italic'
  assign body_font_bold_italic = body_font_bold | font_modify: 'style', 'italic'
%}

{% style %}
  {{ settings.type_body_font | font_face: font_display: 'swap' }}
  {{ body_font_bold | font_face: font_display: 'swap' }}
  {{ body_font_italic | font_face: font_display: 'swap' }}
  {{ body_font_bold_italic | font_face: font_display: 'swap' }}
  {{ settings.type_header_font | font_face: font_display: 'swap' }}

  :root {
    --font-body-family: {{ settings.type_body_font.family }}, {{ settings.type_body_font.fallback_families }};
    --font-body-style: {{ settings.type_body_font.style }};
    --font-body-weight: {{ settings.type_body_font.weight }};
    --font-body-weight-bold: {{ settings.type_body_font.weight | plus: 300 | at_most: 1000 }};

    --font-heading-family: {{ settings.type_header_font.family }}, {{ settings.type_header_font.fallback_families }};
    --font-heading-style: {{ settings.type_header_font.style }};
    --font-heading-weight: {{ settings.type_header_font.weight }};

    --font-body-scale: {{ settings.body_scale | divided_by: 100.0 }};
    --font-heading-scale: {{ settings.heading_scale | times: 1.0 | divided_by: settings.body_scale }};

    --color-base-text: {{ settings.colors_text.red }}, {{ settings.colors_text.green }}, {{ settings.colors_text.blue }};
    --color-shadow: {{ settings.colors_text.red }}, {{ settings.colors_text.green }}, {{ settings.colors_text.blue }};
    --color-base-background-1: {{ settings.colors_background_1.red }}, {{ settings.colors_background_1.green }}, {{ settings.colors_background_1.blue }};
    --color-base-background-2: {{ settings.colors_background_2.red }}, {{ settings.colors_background_2.green }}, {{ settings.colors_background_2.blue }};
    --color-base-solid-button-labels: {{ settings.colors_solid_button_labels.red }}, {{ settings.colors_solid_button_labels.green }}, {{ settings.colors_solid_button_labels.blue }};
    --color-base-outline-button-labels: {{ settings.colors_outline_button_labels.red }}, {{ settings.colors_outline_button_labels.green }}, {{ settings.colors_outline_button_labels.blue }};
    --color-base-accent-1: {{ settings.colors_accent_1.red }}, {{ settings.colors_accent_1.green }}, {{ settings.colors_accent_1.blue }};
    --color-base-accent-2: {{ settings.colors_accent_2.red }}, {{ settings.colors_accent_2.green }}, {{ settings.colors_accent_2.blue }};
    --payment-terms-background-color: {{ settings.colors_background_1 }};

    --gradient-base-background-1: {% if settings.gradient_background_1 != blank %}{{ settings.gradient_background_1 }}{% else %}{{ settings.colors_background_1 }}{% endif %};
    --gradient-base-background-2: {% if settings.gradient_background_2 != blank %}{{ settings.gradient_background_2 }}{% else %}{{ settings.colors_background_2 }}{% endif %};
    --gradient-base-accent-1: {% if settings.gradient_accent_1 != blank %}{{ settings.gradient_accent_1 }}{% else %}{{ settings.colors_accent_1 }}{% endif %};
    --gradient-base-accent-2: {% if settings.gradient_accent_2 != blank %}{{ settings.gradient_accent_2 }}{% else %}{{ settings.colors_accent_2 }}{% endif %};

    --media-padding: {{ settings.media_padding }}px;
    --media-border-opacity: {{ settings.media_border_opacity | divided_by: 100.0 }};
    --media-border-width: {{ settings.media_border_thickness }}px;
    --media-radius: {{ settings.media_radius }}px;
    --media-shadow-opacity: {{ settings.media_shadow_opacity | divided_by: 100.0 }};
    --media-shadow-horizontal-offset: {{ settings.media_shadow_horizontal_offset }}px;
    --media-shadow-vertical-offset: {{ settings.media_shadow_vertical_offset }}px;
    --media-shadow-blur-radius: {{ settings.media_shadow_blur }}px;
    --media-shadow-visible: {% if settings.media_shadow_opacity > 0 %}1{% else %}0{% endif %};

    --page-width: {{ settings.page_width | divided_by: 10 }}rem;
    --page-width-margin: {% if settings.page_width == '1600' %}2{% else %}0{% endif %}rem;

    --product-card-image-padding: {{ settings.card_image_padding | divided_by: 10.0 }}rem;
    --product-card-corner-radius: {{ settings.card_corner_radius | divided_by: 10.0 }}rem;
    --product-card-text-alignment: {{ settings.card_text_alignment }};
    --product-card-border-width: {{ settings.card_border_thickness | divided_by: 10.0 }}rem;
    --product-card-border-opacity: {{ settings.card_border_opacity | divided_by: 100.0 }};
    --product-card-shadow-opacity: {{ settings.card_shadow_opacity | divided_by: 100.0 }};
    --product-card-shadow-visible: {% if settings.card_shadow_opacity > 0 %}1{% else %}0{% endif %};
    --product-card-shadow-horizontal-offset: {{ settings.card_shadow_horizontal_offset | divided_by: 10.0 }}rem;
    --product-card-shadow-vertical-offset: {{ settings.card_shadow_vertical_offset | divided_by: 10.0 }}rem;
    --product-card-shadow-blur-radius: {{ settings.card_shadow_blur | divided_by: 10.0 }}rem;

    --collection-card-image-padding: {{ settings.collection_card_image_padding | divided_by: 10.0 }}rem;
    --collection-card-corner-radius: {{ settings.collection_card_corner_radius | divided_by: 10.0 }}rem;
    --collection-card-text-alignment: {{ settings.collection_card_text_alignment }};
    --collection-card-border-width: {{ settings.collection_card_border_thickness | divided_by: 10.0 }}rem;
    --collection-card-border-opacity: {{ settings.collection_card_border_opacity | divided_by: 100.0 }};
    --collection-card-shadow-opacity: {{ settings.collection_card_shadow_opacity | divided_by: 100.0 }};
    --collection-card-shadow-visible: {% if settings.collection_card_shadow_opacity > 0 %}1{% else %}0{% endif %};
    --collection-card-shadow-horizontal-offset: {{ settings.collection_card_shadow_horizontal_offset | divided_by: 10.0 }}rem;
    --collection-card-shadow-vertical-offset: {{ settings.collection_card_shadow_vertical_offset | divided_by: 10.0 }}rem;
    --collection-card-shadow-blur-radius: {{ settings.collection_card_shadow_blur | divided_by: 10.0 }}rem;

    --blog-card-image-padding: {{ settings.blog_card_image_padding | divided_by: 10.0 }}rem;
    --blog-card-corner-radius: {{ settings.blog_card_corner_radius | divided_by: 10.0 }}rem;
    --blog-card-text-alignment: {{ settings.blog_card_text_alignment }};
    --blog-card-border-width: {{ settings.blog_card_border_thickness | divided_by: 10.0 }}rem;
    --blog-card-border-opacity: {{ settings.blog_card_border_opacity | divided_by: 100.0 }};
    --blog-card-shadow-opacity: {{ settings.blog_card_shadow_opacity | divided_by: 100.0 }};
    --blog-card-shadow-visible: {% if settings.blog_card_shadow_opacity > 0 %}1{% else %}0{% endif %};
    --blog-card-shadow-horizontal-offset: {{ settings.blog_card_shadow_horizontal_offset | divided_by: 10.0 }}rem;
    --blog-card-shadow-vertical-offset: {{ settings.blog_card_shadow_vertical_offset | divided_by: 10.0 }}rem;
    --blog-card-shadow-blur-radius: {{ settings.blog_card_shadow_blur | divided_by: 10.0 }}rem;

    --badge-corner-radius: {{ settings.badge_corner_radius | divided_by: 10.0 }}rem;

    --popup-border-width: {{ settings.popup_border_thickness }}px;
    --popup-border-opacity: {{ settings.popup_border_opacity | divided_by: 100.0 }};
    --popup-corner-radius: {{ settings.popup_corner_radius }}px;
    --popup-shadow-opacity: {{ settings.popup_shadow_opacity | divided_by: 100.0 }};
    --popup-shadow-horizontal-offset: {{ settings.popup_shadow_horizontal_offset }}px;
    --popup-shadow-vertical-offset: {{ settings.popup_shadow_vertical_offset }}px;
    --popup-shadow-blur-radius: {{ settings.popup_shadow_blur }}px;

    --drawer-border-width: {{ settings.drawer_border_thickness }}px;
    --drawer-border-opacity: {{ settings.drawer_border_opacity | divided_by: 100.0 }};
    --drawer-shadow-opacity: {{ settings.drawer_shadow_opacity | divided_by: 100.0 }};
    --drawer-shadow-horizontal-offset: {{ settings.drawer_shadow_horizontal_offset }}px;
    --drawer-shadow-vertical-offset: {{ settings.drawer_shadow_vertical_offset }}px;
    --drawer-shadow-blur-radius: {{ settings.drawer_shadow_blur }}px;

    --spacing-sections-desktop: {{ settings.spacing_sections }}px;
    --spacing-sections-mobile: {% if settings.spacing_sections < 24 %}{{ settings.spacing_sections }}{% else %}{{ settings.spacing_sections | times: 0.7 | round | at_least: 20 }}{% endif %}px;

    --grid-desktop-vertical-spacing: {{ settings.spacing_grid_vertical }}px;
    --grid-desktop-horizontal-spacing: {{ settings.spacing_grid_horizontal }}px;
    --grid-mobile-vertical-spacing: {{ settings.spacing_grid_vertical | divided_by: 2 }}px;
    --grid-mobile-horizontal-spacing: {{ settings.spacing_grid_horizontal | divided_by: 2 }}px;

    --text-boxes-border-opacity: {{ settings.text_boxes_border_opacity | divided_by: 100.0 }};
    --text-boxes-border-width: {{ settings.text_boxes_border_thickness }}px;
    --text-boxes-radius: {{ settings.text_boxes_radius }}px;
    --text-boxes-shadow-opacity: {{ settings.text_boxes_shadow_opacity | divided_by: 100.0 }};
    --text-boxes-shadow-visible: {% if settings.text_boxes_shadow_opacity > 0 %}1{% else %}0{% endif %};
    --text-boxes-shadow-horizontal-offset: {{ settings.text_boxes_shadow_horizontal_offset }}px;
    --text-boxes-shadow-vertical-offset: {{ settings.text_boxes_shadow_vertical_offset }}px;
    --text-boxes-shadow-blur-radius: {{ settings.text_boxes_shadow_blur }}px;

    --buttons-radius: {{ settings.buttons_radius }}px;
    --buttons-radius-outset: {% if settings.buttons_radius > 0 %}{{ settings.buttons_radius | plus: settings.buttons_border_thickness }}{% else %}0{% endif %}px;
    --buttons-border-width: {% if settings.buttons_border_opacity > 0 %}{{ settings.buttons_border_thickness }}{% else %}0{% endif %}px;
    --buttons-border-opacity: {{ settings.buttons_border_opacity | divided_by: 100.0 }};
    --buttons-shadow-opacity: {{ settings.buttons_shadow_opacity | divided_by: 100.0 }};
    --buttons-shadow-visible: {% if settings.buttons_shadow_opacity > 0 %}1{% else %}0{% endif %};
    --buttons-shadow-horizontal-offset: {{ settings.buttons_shadow_horizontal_offset }}px;
    --buttons-shadow-vertical-offset: {{ settings.buttons_shadow_vertical_offset }}px;
    --buttons-shadow-blur-radius: {{ settings.buttons_shadow_blur }}px;
    --buttons-border-offset: {% if settings.buttons_radius > 0 or settings.buttons_shadow_opacity > 0 %}0.3{% else %}0{% endif %}px;

    --inputs-radius: {{ settings.inputs_radius }}px;
    --inputs-border-width: {{ settings.inputs_border_thickness }}px;
    --inputs-border-opacity: {{ settings.inputs_border_opacity | divided_by: 100.0 }};
    --inputs-shadow-opacity: {{ settings.inputs_shadow_opacity | divided_by: 100.0 }};
    --inputs-shadow-horizontal-offset: {{ settings.inputs_shadow_horizontal_offset }}px;
    --inputs-margin-offset: {% if settings.inputs_shadow_vertical_offset != 0 and settings.inputs_shadow_opacity > 0 %}{{ settings.inputs_shadow_vertical_offset | abs }}{% else %}0{% endif %}px;
    --inputs-shadow-vertical-offset: {{ settings.inputs_shadow_vertical_offset }}px;
    --inputs-shadow-blur-radius: {{ settings.inputs_shadow_blur }}px;
    --inputs-radius-outset: {% if settings.inputs_radius > 0 %}{{ settings.inputs_radius | plus: settings.inputs_border_thickness }}{% else %}0{% endif %}px;

    --variant-pills-radius: {{ settings.variant_pills_radius }}px;
    --variant-pills-border-width: {{ settings.variant_pills_border_thickness }}px;
    --variant-pills-border-opacity: {{ settings.variant_pills_border_opacity | divided_by: 100.0 }};
    --variant-pills-shadow-opacity: {{ settings.variant_pills_shadow_opacity | divided_by: 100.0 }};
    --variant-pills-shadow-horizontal-offset: {{ settings.variant_pills_shadow_horizontal_offset }}px;
    --variant-pills-shadow-vertical-offset: {{ settings.variant_pills_shadow_vertical_offset }}px;
    --variant-pills-shadow-blur-radius: {{ settings.variant_pills_shadow_blur }}px;
  }

  *,
  *::before,
  *::after {
    box-sizing: inherit;
  }

  html {
    box-sizing: border-box;
    font-size: calc(var(--font-body-scale) * 62.5%);
    height: 100%;
  }

  body {
    display: grid;
    grid-template-rows: auto auto 1fr auto;
    grid-template-columns: 100%;
    min-height: 100%;
    margin: 0;
    font-size: 1.5rem;
    letter-spacing: 0.06rem;
    line-height: calc(1 + 0.8 / var(--font-body-scale));
    font-family: var(--font-body-family);
    font-style: var(--font-body-style);
    font-weight: var(--font-body-weight);
  }

  @media screen and (min-width: 750px) {
    body {
      font-size: 1.6rem;
    }
  }
{% endstyle %}

{{ 'base.css' | asset_url | stylesheet_tag }}
{{ 'swup.css' | asset_url | stylesheet_tag }}

{%- unless settings.type_body_font.system? -%}
  <link rel="preload" as="font" href="{{ settings.type_body_font | font_url }}" type="font/woff2" crossorigin>
{%- endunless -%}
{%- unless settings.type_header_font.system? -%}
  <link rel="preload" as="font" href="{{ settings.type_header_font | font_url }}" type="font/woff2" crossorigin>
{%- endunless -%}

{%- if settings.predictive_search_enabled -%}
  <link
    rel="stylesheet"
    href="{{ 'component-predictive-search.css' | asset_url }}"
    media="print"
    onload="this.media='all'"
  >
{%- endif -%}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.css">
<link href="https://unpkg.com/aos@2.3.1/dist/aos.css" rel="stylesheet">

<script>
  document.documentElement.className = document.documentElement.className.replace('no-js', 'js');
  if (Shopify.designMode) {
    document.documentElement.classList.add('shopify-design-mode');
  }
</script>

for some reason I can't paste the first line in the body part, so an image here

{{ 'accessibility.skip_to_text' | t }}

{%- if settings.cart_type == 'drawer' -%}
  {%- render 'cart-drawer' -%}
{%- endif -%}

{% section 'announcement-bar' %}
{% section 'header' %}
<main id="MainContent" class="content-for-layout focus-none" role="main" tabindex="-1">
  {{ content_for_layout }}
</main>

{% section 'footer' %}
{% section 'super-cart-drawer' %}

<ul hidden>
  <li id="a11y-refresh-page-message">{{ 'accessibility.refresh_page' | t }}</li>
  <li id="a11y-new-window-message">{{ 'accessibility.link_messages.new_window' | t }}</li>
</ul>

<script>
  
  window.shopUrl = '{{ request.origin }}';
  window.routes = {
    cart_add_url: '{{ routes.cart_add_url }}',
    cart_change_url: '{{ routes.cart_change_url }}',
    cart_update_url: '{{ routes.cart_update_url }}',
    cart_url: '{{ routes.cart_url }}',
    predictive_search_url: '{{ routes.predictive_search_url }}'
  };

  window.cartStrings = {
    error: `{{ 'sections.cart.cart_error' | t }}`,
    quantityError: `{{ 'sections.cart.cart_quantity_error_html' | t: quantity: '[quantity]' }}`
  }

  window.variantStrings = {
    addToCart: `{{ 'products.product.add_to_cart' | t }}`,
    soldOut: `{{ 'products.product.sold_out' | t }}`,
    unavailable: `{{ 'products.product.unavailable' | t }}`,
  }

  window.accessibilityStrings = {
    imageAvailable: `{{ 'products.product.media.image_available' | t: index: '[index]' }}`,
    shareSuccess: `{{ 'general.share.success_message' | t }}`,
    pauseSlideshow: `{{ 'sections.slideshow.pause_slideshow' | t }}`,
    playSlideshow: `{{ 'sections.slideshow.play_slideshow' | t }}`,
  
  }

</script>

{%- if settings.predictive_search_enabled -%}
  <script src="{{ 'predictive-search.js' | asset_url }}" defer="defer"></script>
{%- endif -%}

<script
  src="https://code.jquery.com/jquery-3.6.0.min.js"
  integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="
  crossorigin="anonymous"
></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.js"></script>
<script src="https://unpkg.com/aos@2.3.1/dist/aos.js"></script>
<script src="https://unpkg.com/swup@latest/dist/swup.min.js"></script>
<script src="{{ 'swup.js' | asset_url }}" defer="defer"></script>

<script>
  AOS.init();
</script>
{% if request.design_mode %}
  document.addEventListener("shopify:section:load", function(event) {
        AOS.init();
  });
{% endif %}

[daun]

Try and put the id="swup" on a child of the body, e.g. your main element. The body itself isn't supported as a container.

[monkz88]

You're right, that did it. Now it can switch pages, however, now it says this:

[daun]

Just make sure that every (!) page on your site has the #swup container and you're good.