diff --git a/next.config.mjs b/next.config.mjs
index 800c8e1e6..099499259 100644
--- a/next.config.mjs
+++ b/next.config.mjs
@@ -62,6 +62,11 @@ const nextConfig = {
         destination: '/editor/getting-started/install',
         permanent: true,
       },
+      {
+        source: '/editor/getting-started/install/cdn',
+        destination: '/editor/getting-started/install/vanilla-javascript',
+        permanent: true,
+      },
       {
         source: '/editor/markdown/getting-started',
         destination: '/editor/markdown/getting-started/installation',
diff --git a/src/content/editor/core-concepts/decorations.mdx b/src/content/editor/core-concepts/decorations.mdx
new file mode 100644
index 000000000..66542876b
--- /dev/null
+++ b/src/content/editor/core-concepts/decorations.mdx
@@ -0,0 +1,167 @@
+---
+title: Decorations
+description: How to use Tiptap's Decorations API - implementing decorations in extensions, decoration types, and performance tips.
+meta:
+  title: Decorations | Tiptap Editor Docs
+  description: Learn how to implement and optimize decorations in Tiptap extensions.
+  category: Editor
+---
+
+## TL;DR
+
+Decorations let you draw styling or UI on top of the document without changing the document content. Add a `decorations()` factory to an extension and return a small array of simple decoration items. Use `shouldUpdate` to avoid unnecessary recalculation.
+
+## What is the Decoration API?
+
+The Decoration API is a small, extension-facing surface that lets extensions describe visual decorations (highlights, badges, widgets) without mutating the document. Tiptap turns those descriptions into ProseMirror decorations and renders them in the editor view.
+
+## Decoration types 
+
+- inline – styling applied to a range of text (e.g., highlights).
+- node – attributes applied to an entire node (e.g., add a class to a paragraph).
+- widget – a DOM node rendered at a specific position (e.g., an inline badge or button). Widgets are non-editable.
+
+## How to add decorations to an extension
+
+Add a `decorations()` factory to your extension that returns an object with `create({ state, view, editor })` and an optional `shouldUpdate`.
+
+Inline example (using the helper):
+
+```js
+import { Extension, createInlineDecoration } from '@tiptap/core'
+
+export const MakeWordRed = Extension.create({
+  name: 'makeWordRed',
+
+  decorations: () => ({
+    create({ state }) {
+      // return an array of decoration items
+      return [createInlineDecoration(5, 11, { style: 'color: red' })]
+    },
+    shouldUpdate: ({ tr }) => tr.docChanged,
+  }),
+})
+```
+
+Node example (using the helper):
+
+```js
+import { Extension, createNodeDecoration } from '@tiptap/core'
+
+export const HighlightParagraph = Extension.create({
+  name: 'highlightParagraph',
+
+  decorations: () => ({
+    create({ state }) {
+      // highlight the first paragraph
+      const pos = 0
+      const end = 50
+      return [createNodeDecoration(pos, end, { class: 'my-paragraph' })]
+    },
+    shouldUpdate: ({ tr }) => tr.docChanged,
+  }),
+})
+```
+
+Widget example (using the helper):
+
+```js
+import { Extension, createWidgetDecoration } from '@tiptap/core'
+
+export const StarAfter = Extension.create({
+  name: 'starAfter',
+
+  decorations: () => ({
+    create() {
+      return [
+        createWidgetDecoration(10, () => {
+          const el = document.createElement('span')
+          el.textContent = ' ⭐'
+          el.setAttribute('contenteditable', 'false')
+          return el
+        }),
+      ]
+    },
+    shouldUpdate: ({ tr }) => tr.docChanged,
+  }),
+})
+```
+
+## Utility functions
+
+- `createInlineDecoration(from, to, attributes)` - returns a small object describing an inline decoration.
+- `createNodeDecoration(from, to, attributes)` - returns a node decoration object.
+- `createWidgetDecoration(at, widget)` - returns a widget item where `widget` is a function that creates a DOM node.
+
+Use these helpers for concise examples; under the hood Tiptap maps these items to ProseMirror decorations.
+
+## Create a decoration without helpers
+
+You can return the plain decoration items directly if you prefer to avoid helpers. The shape is intentionally small and simple:
+
+```js
+// manual inline decoration
+return [{ type: 'inline', from: 5, to: 11, attributes: { style: 'background: yellow' } }]
+
+// manual widget
+return [
+  {
+    type: 'widget',
+    from: 20,
+    to: 20,
+    widget: () => {
+      const el = document.createElement('button')
+      el.textContent = 'Click'
+      el.setAttribute('contenteditable', 'false')
+      return el
+    },
+  },
+]
+```
+
+Notes:
+
+- `from`/`to` are document positions.
+- For widgets, return a DOM node from the `widget` function. If you mount React components, return a container element and use the React widget helper from the React package.
+
+## Best practices & performance
+
+- Use `shouldUpdate` to limit recalculation. A common simple implementation is `({ tr }) => tr.docChanged`.
+- Keep `spec` data small (strings/numbers) if you add it to items - it's used to decide whether a decoration meaning changed.
+- Avoid scanning the whole document every transaction. Narrow traversal to nodes of interest or cache results per node when possible.
+- For widgets, provide a stable `spec.key` (or ensure your widget markup is stable) to avoid unnecessary remounts.
+
+More about `spec` and stability
+
+- The `spec` object on a decoration is used to decide whether a decoration's meaning changed between renders. Keep it tiny and primitive (strings, numbers, booleans). Avoid functions, DOM nodes, or large objects inside `spec`.
+- For widgets, include a stable identifier in `spec` (for example `spec.key: 'comment-123'`) so the renderer can reuse the same DOM node across updates and avoid remounting React components.
+- Do NOT rely only on document positions for stability. Positions move when the doc changes. Prefer a stable id from the node (for example an `id` in `node.attrs`) or a key you manage on the extension side.
+
+Short widget example with a stable key:
+
+```js
+return [
+  {
+    type: 'widget',
+    from: pos,
+    to: pos,
+    widget: () => {
+      const el = document.createElement('span')
+      el.textContent = '⭐'
+      el.setAttribute('contenteditable', 'false')
+      return el
+    },
+    spec: { key: 'my-widget-42' },
+  },
+]
+```
+
+- If you need to compute keys from node content, compute a stable id once and store it on the node (attrs/marks) or in a side map. Recomputing ephemeral keys on every `create` will cause remounts.
+- Combine sensible `shouldUpdate` logic with stable `spec` values: `shouldUpdate` decides when to recreate the list, `spec` decides whether individual decorations should be updated/reused.
+
+## Troubleshooting
+
+- Widgets flicker or lose internal state: give widgets stable keys (via `spec.key`) or avoid remounting DOM nodes.
+- Widget callbacks see wrong positions after edits: call the provided `getPos()` in widget callbacks (or use the editor APIs) rather than relying on an earlier captured `pos`.
+- Decorations don't update: check `shouldUpdate` and ensure it returns `true` for transactions that should trigger an update.
+
diff --git a/src/content/editor/getting-started/install/cdn.mdx b/src/content/editor/getting-started/install/cdn.mdx
deleted file mode 100644
index 7e1fb4508..000000000
--- a/src/content/editor/getting-started/install/cdn.mdx
+++ /dev/null
@@ -1,40 +0,0 @@
----
-title: CDN
-meta:
-  title: CDN | Tiptap Editor Docs
-  description: Learn how to use Tiptap via CDN for quick and easy setup in demos or tests. Explore our quick start guide in the docs!
-  category: Editor
----
-
-For testing purposes or demos, use our esm.sh CDN builds. Here are a few lines of code you need to get started.
-
-```html
-<!doctype html>
-<html>
-  <head>
-    <meta charset="utf-8" />
-  </head>
-  <body>
-    <div class="element"></div>
-    <script type="module">
-      import { Editor } from 'https://esm.sh/@tiptap/core'
-      import StarterKit from 'https://esm.sh/@tiptap/starter-kit'
-      const editor = new Editor({
-        element: document.querySelector('.element'),
-        extensions: [StarterKit],
-        content: '<p>Hello World!</p>',
-      })
-    </script>
-  </body>
-</html>
-```
-
-Tiptap should now be visible in your browser. Time to give yourself a pat on the back! :)
-
-## Next steps
-
-- [Configure your editor](/editor/getting-started/configure)
-- [Add styles to your editor](/editor/getting-started/style-editor)
-- [Learn more about Tiptaps concepts](/editor/core-concepts/introduction)
-- [Learn how to persist the editor state](/editor/core-concepts/persistence)
-- [Start building your own extensions](/editor/extensions/custom-extensions)
diff --git a/src/content/editor/getting-started/install/vanilla-javascript.mdx b/src/content/editor/getting-started/install/vanilla-javascript.mdx
index 2c06f1794..51e503206 100644
--- a/src/content/editor/getting-started/install/vanilla-javascript.mdx
+++ b/src/content/editor/getting-started/install/vanilla-javascript.mdx
@@ -8,15 +8,23 @@ category: Editor
 
 import { Callout } from '@/components/ui/Callout'
 
-Are you using plain JavaScript or a framework that isn't listed? No worries, we provide everything you need.
+Are you building without a frontend framework like React or Vue? No problem, you can use Tiptap directly in plain JavaScript.
 
 <Callout title="Hint" variant="hint">
-    If you don't use a bundler like Webpack or Rollup, please follow the [CDN](/editor/getting-started/install/cdn) guide instead. Since Tiptap is built in a modular way, you will need to use `<script type="module">` in your HTML to get our CDN imports working.
+
+"Vanilla JavaScript" here means **no frontend framework**, but still using **modern JavaScript with ES module imports** (e.g. through Vite, Rollup, or Webpack).
+
+If you’re not using a build tool, check out the [CDN example below](#using-a-cdn-no-build-step) for an example that runs directly in the browser.
+
 </Callout>
 
 ## Install dependencies
 
-For the following example, you will need `@tiptap/core` (the actual editor), `@tiptap/pm` (the ProseMirror library), and `@tiptap/starter-kit`. The StarterKit doesn't include all extensions, only the most common ones.
+You’ll need the core Tiptap packages to get started:
+
+- `@tiptap/core` – the main editor API  
+- `@tiptap/pm` – ProseMirror, the engine behind Tiptap  
+- `@tiptap/starter-kit` – a convenient bundle of common extensions
 
 ```bash
 npm install @tiptap/core @tiptap/pm @tiptap/starter-kit
@@ -24,7 +32,7 @@ npm install @tiptap/core @tiptap/pm @tiptap/starter-kit
 
 ### Add markup
 
-Add the following HTML where you'd like to mount the editor:
+Add a simple container in your HTML where you want the editor to appear:
 
 ```html
 <div class="element"></div>
@@ -32,7 +40,7 @@ Add the following HTML where you'd like to mount the editor:
 
 ## Initialize the editor
 
-Everything is in place, so let's set up the editor. Add the following code to your JavaScript:
+Create a JavaScript file (for example `src/main.js`) and add the following code:
 
 ```js
 import { Editor } from '@tiptap/core'
@@ -45,7 +53,33 @@ new Editor({
 })
 ```
 
-Open your project in the browser to see Tiptap in action. Good work!
+Now run your dev server (for example with Vite: `npm run dev`) and open the page in your browser. You should see a working Tiptap editor.
+
+## A quick note about styling
+
+Tiptap doesn’t include visual styles by default. The editor only outputs semantic HTML. You can style it however you like with your own CSS or a framework such as Tailwind or Bootstrap.
+
+If you’re using the StarterKit, it includes minimal defaults that make the text render like a basic document.
+Learn more in the [Styling guide](/editor/getting-started/style-editor).
+
+## Using a CDN (no build step)
+
+If you’d rather skip the build tool, here’s a working example using CDN imports:
+
+```html
+<script type="module">
+  import { Editor } from 'https://esm.sh/@tiptap/core'
+  import StarterKit from 'https://esm.sh/@tiptap/starter-kit'
+
+  new Editor({
+    element: document.querySelector('.element'),
+    extensions: [StarterKit],
+    content: '<p>Hello from CDN!</p>',
+  })
+</script>
+
+<div class="element"></div>
+```
 
 ## Next steps
 
diff --git a/src/content/editor/sidebar.ts b/src/content/editor/sidebar.ts
index 8a8f778ea..b89b7eadc 100644
--- a/src/content/editor/sidebar.ts
+++ b/src/content/editor/sidebar.ts
@@ -513,6 +513,10 @@ export const sidebarConfig: SidebarConfig = {
           href: '/editor/core-concepts/schema',
           title: 'Schema',
         },
+        {
+          href: '/editor/core-concepts/decorations',
+          title: 'Decorations',
+        },
         {
           href: '/editor/core-concepts/keyboard-shortcuts',
           title: 'Keyboard shortcuts',