# Tabbis theme component

**URL:** <https://meta.discourse.org/t/tabbis-theme-component/251096>\
**Category:** Development\
**Created:** [January 9, 2023, 4:15am UTC](https://meta.discourse.org/t/tabbis-theme-component/251096 "2023-01-09T04:15:00Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![unfairest](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/unfairest/32/288433_2.png) [@unfairest](https://meta.discourse.org/u/unfairest)\
**Post date:** [January 9, 2023, 4:15am UTC](https://meta.discourse.org/t/tabbis-theme-component/251096/1 "2023-01-09T04:15:00Z")

</div>

Hello! I am trying to create a theme component to use the external script [tabbis.js](https://www.opensourceagenda.com/projects/tabbisjs) so I can create tabs in posts. I followed the walkthrough here: [Embed widget within text in a topic - #2 by Johani](https://meta.discourse.org/t/embed-widget-within-text-in-a-topic/206919/2)

Here is what my theme component looks like so far.

Common \> Header

```plaintext
// options
const TABBIS_SCRIPT_SRC = "https://cdn.jsdelivr.net/gh/jenstornell/tabbis.js/assets/js/src/tabbis.es6.js";

// we use the Discourse Load script lib to ensure scripts are loaded
// properly. Don't worry, this is smart enough to not duplicate the script
// if it's already loaded
const loadScript = require("discourse/lib/load-script").default;

// create a post decorator
api.decorateCookedElement(
  post => {
    // does this post have tabbis tabs?
    const tabbisTabs = post.querySelectorAll('[data-wrap="tabbis"]');

    // Yes, so let's do some work.
    if (tabbisTabs.length) {
      // for each tabbis widget
      tabbisTabs.forEach(tabbisTab => {

        // load the tabbis script.
        loadScript(TABBIS_SCRIPT_SRC).then(() => {

          // everything is ready, let's call the tabbis script
          tabbis();
        });
      });
    }
  },
  // add an id to the decorator to avoid memory leaks
  { id: "render-tabbis-tabs" }
);

</script>

```

Common \> CSS (copied straight from the tabbis.js repo)

```plaintext
[data-panes] {
  --color: #000; }

[data-tabs] {
  background: var(--color);
  border: 2px solid var(--color);
  border-bottom: none;
  overflow-x: auto;
  display: flex; }
  [data-tabs] > [role="tab"] {
    all: unset;
    padding: .75rem 1.5rem;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
    font-weight: 600;
    color: #fff;
    border: 1px solid transparent;
    outline: none; }
    [data-tabs] > [role="tab"]:hover {
      background: rgba(255, 255, 255, 0.2); }
    [data-tabs] > [role="tab"]:active {
      background: rgba(255, 255, 255, 0.3); }
    [data-tabs] > [role="tab"]:focus {
      border: 1px dotted rgba(255, 255, 255, 0.5); }
    [data-tabs] > [role="tab"][aria-selected="true"] {
      background: #fff;
      color: #000; }
      [data-tabs] > [role="tab"][aria-selected="true"]:focus {
        border: 1px dotted rgba(0, 0, 0, 0.5); }

[data-panes] {
  border: 2px solid var(--color);
  border-top: none; }
  [data-panes] > * {
    background: #fff;
    padding: 2rem;
    font-weight: 600;
    outline: none;
    border: 1px solid transparent; }
    [data-panes] > *:focus {
      border: 1px dotted rgba(0, 0, 0, 0.5); }
    @media screen and (max-width: 460px) {
      [data-panes] > * {
        padding: 1rem; } }

```

Content Security Policy Script src: added [https://cdn.jsdelivr.net](https://cdn.jsdelivr.net)

Post markup

```plaintext
[wrap="tabbis"]<div data-tabs>
<button>Tab1</button>
<button>Tab2</button>
<button>Tab3</button>
</div>

<div data-panes>
<div>Pane1</div>
<div>Pane2</div>
<div>Pane3</div>
</div>[/wrap]

```

The script seems to load for a split second after I edit the post, but once it loads fully it’s unusable.

This appears in the console but I have no idea how to fix it. Is there a conflict with other tabs in Discourse?

 ![tabbis uncaught type error](https://global.discourse-cdn.com/meta/original/4X/5/f/d/5fddf9a61429a7f6393289c63d90d539e97140c1.png)

How can I get this working? I’m at a loss!

---

_[View the full topic](https://meta.discourse.org/t/tabbis-theme-component/251096)._