diff --git a/packages/documentation-v7/.storybook/preview.ts b/packages/documentation-v7/.storybook/preview.ts
index ec8aa24698..df93e97217 100644
--- a/packages/documentation-v7/.storybook/preview.ts
+++ b/packages/documentation-v7/.storybook/preview.ts
@@ -1,15 +1,15 @@
 import type { Preview } from '@storybook/web-components';
 
-import DocsLayout from './blocks/layout';
-import { format } from 'prettier';
-import { badgesConfig, prettierOptions, resetComponents } from './helpers';
-import './helpers/register-web-components';
 import {
-  extractArgTypesFactory,
+  extractArgTypes,
   extractComponentDescription,
   setStencilDocJson,
 } from '@pxtrn/storybook-addon-docs-stencil';
 import { StencilJsonDocs } from '@pxtrn/storybook-addon-docs-stencil/dist/types';
+import { format } from 'prettier';
+import DocsLayout from './blocks/layout';
+import { badgesConfig, prettierOptions, resetComponents } from './helpers';
+import './helpers/register-web-components';
 
 import './styles/preview.scss';
 import themes from './styles/themes';
@@ -58,7 +58,7 @@ const preview: Preview = {
         transform: (snippet: string) => format(snippet, prettierOptions),
       },
       components: resetComponents,
-      extractArgTypes: extractArgTypesFactory({ dashCase: true }),
+      extractArgTypes,
       extractComponentDescription,
     },
     actions: { argTypesRegex: '^on[A-Z].*' },
diff --git a/packages/documentation-v7/src/stories/components/collapsible/collapsible.demo.stories.ts b/packages/documentation-v7/src/stories/components/collapsible/collapsible.demo.stories.ts
new file mode 100644
index 0000000000..be2718b37f
--- /dev/null
+++ b/packages/documentation-v7/src/stories/components/collapsible/collapsible.demo.stories.ts
@@ -0,0 +1,115 @@
+import { spread } from '@open-wc/lit-helpers';
+import { useArgs } from '@storybook/preview-api';
+import { Meta, StoryContext, StoryObj } from '@storybook/web-components';
+import { html } from 'lit';
+import { unsafeHTML } from 'lit/directives/unsafe-html.js';
+
+import { definedProperties } from '../../../utils';
+
+const meta: Meta<HTMLPostCollapsibleElement> = {
+  title: 'Hidden/demos/components/Collapsible',
+  component: 'post-collapsible',
+  args: {
+    innerHTML: `<span slot='header'>Titulum</span><p>Contentus momentus vero siteos et accusam iretea et justo.</p>`,
+  },
+  argTypes: {
+    innerHTML: {
+      description:
+        'Defines the HTML markup contained in the collapsible.<br/>' +
+        'Elements with a `slot="header"` attribute are displayed in the header while others are shown in the body.',
+      table: {
+        category: 'content',
+        type: {
+          summary: 'string',
+        },
+      },
+    },
+  },
+  render: (args, context) => defaultRender(args, context),
+};
+
+export default meta;
+
+type Story = StoryObj<HTMLPostCollapsibleElement>;
+
+function defaultRender(
+  args: HTMLPostCollapsibleElement,
+  context: StoryContext<HTMLPostCollapsibleElement>,
+) {
+  const hasHeader = args.innerHTML.indexOf('slot="header"') > -1;
+  const collapsibleId = `collapsible-example--${context.name.replace(/ /g, '-').toLowerCase()}`;
+
+  const collapsibleProperties = definedProperties({
+    'collapsed': args.collapsed,
+    'heading-level': args.headingLevel,
+    'id': hasHeader ? undefined : collapsibleId,
+  });
+
+  const collapsibleComponent = html`
+    <post-collapsible ${spread(collapsibleProperties)}>
+      ${unsafeHTML(args.innerHTML)}
+    </post-collapsible>
+  `;
+
+  const [currentArgs, updateArgs] = useArgs();
+
+  const toggleCollapse = (open?: boolean) => {
+    const collapsible = document.querySelector(`#${collapsibleId}`) as HTMLPostCollapsibleElement;
+    collapsible.toggle(open).then((isOpen: boolean) => {
+      if (typeof currentArgs.collapsed !== 'undefined') updateArgs({ collapsed: !isOpen });
+    });
+  };
+
+  const togglers = [
+    ['Toggle', () => toggleCollapse()],
+    ['Show', () => toggleCollapse(true)],
+    ['Hide', () => toggleCollapse(false)],
+  ];
+
+  const togglersHtml = html`
+    <div class="d-flex gap-mini mb-regular">
+      ${togglers.map(
+        ([label, listener]) =>
+          html`
+            <button
+              aria-controls="${collapsibleId}"
+              aria-expanded="${!args.collapsed}"
+              class="btn btn-secondary"
+              @click="${listener}"
+            >
+              ${label}
+            </button>
+          `,
+      )}
+    </div>
+  `;
+
+  return html`
+    ${hasHeader ? null : togglersHtml} ${collapsibleComponent}
+  `;
+}
+
+export const Default: Story = {};
+
+export const InitiallyCollapsed: Story = {
+  args: { collapsed: true },
+};
+
+export const HeadingLevel: Story = {
+  args: { headingLevel: 6 },
+};
+
+export const IntricateContent: Story = {
+  args: {
+    innerHTML: `<p>I am part of the body</p>
+      <span slot='header'>Customus<em>&nbsp;Titulum</em></span>
+      <small slot='header' class='text-muted'>&nbsp;- I am part of the header</small>
+      <p>I am part of the body too!</p>`,
+  },
+};
+
+export const CustomTrigger: Story = {
+  args: {
+    innerHTML: `<p class='border rounded p-large'>Contentus momentus vero siteos et accusam iretea et justo.</p>`,
+  },
+};
diff --git a/packages/documentation-v7/src/stories/components/collapsible/collapsible.docs.mdx b/packages/documentation-v7/src/stories/components/collapsible/collapsible.docs.mdx
new file mode 100644
index 0000000000..36ffe825aa
--- /dev/null
+++ b/packages/documentation-v7/src/stories/components/collapsible/collapsible.docs.mdx
@@ -0,0 +1,61 @@
+import { Canvas, Controls, Meta } from '@storybook/blocks';
+import { BADGE } from '../../../../.storybook/constants';
+import * as CollapsibleStories from './collapsible.demo.stories';
+
+<Meta title="Components/Collapsible" parameters={{ badges: [BADGE.BETA, BADGE.NEEDS_REVISION] }} />
+
+# Collapsible
+
+<p className="lead">Toggle the visibility of content across your project.</p>
+
+The `<post-collapsible>` component is used to show and hide content.
+Collapsing an element will animate the height from its current value to 0.
+
+<Canvas of={CollapsibleStories.Default} />
+<Controls of={CollapsibleStories.Default} />
+
+## Examples
+
+The following examples show different use cases for the `<post-collapsible>` component.
+
+### Initially Collapsed
+
+To make the collapsible content hidden by default, just use the `collapsible="true"` property.
+
+<Canvas of={CollapsibleStories.InitiallyCollapsed} />
+
+### Heading Level
+
+Use the `heading-level` property to define the hierarchical level of the collapsible header within the structure of a document.
+
+<Canvas of={CollapsibleStories.HeadingLevel} />
+
+### Intricate Content
+
+The collapsible component uses [HTML slot elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/slot)
+to allow any HTML content to be used as part of its header and body.<br/>
+By default, all children are appended to the component's body.
+For a specific child to be displayed in the header, a `slot="header"` attribute must be added.
+
+<Canvas of={CollapsibleStories.IntricateContent} />
+
+### Custom Trigger
+
+The `<post-collapsible>` component exposes a `.toggle()` method that allows to trigger the collapse programmatically.
+This method is asynchronous and returns a promise that resolves with the current open state.
+It optionally takes a boolean parameter that forces open when `true` or close when `false`.
+
+```typescript
+const collapsible = document.querySelector('#collapsibleId') as HTMLPostCollapsibleElement;
+collapsible.toggle(/* open: boolean */).then((/* isOpen: boolean */) => {});
+```
+
+A header is then not mandatory and can be replaced by an external control.
+
+In this case, to ensure good accessibility, identify the collapsible with an `id`,
+then add an `aria-controls` attribute to your control element referencing this `id`.
+Also make sure to add an `aria-expanded` attribute to the control element:
+if the collapsible element is closed, the attribute on the control element must have a value of `aria-expanded="false"`
+and `aria-expanded="true"` otherwise.
+
+<Canvas of={CollapsibleStories.CustomTrigger} />