c15t/docs/shared/react/guides/iframe-blocking.md

Headless JavaScript consent management platform for cookie banners, privacy preferences, consent storage, and script gating.

---
title: Iframe Blocking
description: Reference page for iframe blocking.
group: reference
---
Embedded iframes from third parties (YouTube, Google Maps, social media widgets) can set cookies and track users without their consent. c15t provides two approaches to gate iframes behind consent:

1. **`<Frame>` component** - A React component that conditionally renders children based on consent
2. **HTML `data-category` attribute** - For raw `<iframe>` elements outside of React

### Custom Placeholder

Replace the default placeholder with your own UI:

```tsx
<Frame
  category="marketing"
  placeholder={
    <div className="flex items-center justify-center h-64 bg-gray-100 rounded">
      <p>Enable marketing cookies to watch this video.</p>
    </div>
  }
>
  <iframe src="https://www.youtube.com/embed/..." />
</Frame>
```

### Compound Components

Build custom placeholder layouts using compound components:

```tsx
<Frame.Root category="marketing">
  <Frame.Title category="marketing" />
  <Frame.Button category="marketing" />
</Frame.Root>
```

## HTML Attribute Approach

For iframes outside of React (e.g., CMS content, server-rendered HTML), add `data-category` and use `data-src` instead of `src`:

```html
<iframe
  data-src="https://www.youtube.com/embed/dQw4w9WgXcQ"
  data-category="marketing"
  width="560"
  height="315"
></iframe>
```

When consent for the specified category is granted, c15t automatically swaps `data-src` to `src`, loading the iframe. When consent is revoked, `src` is moved back to `data-src`.

### Dynamic Iframes

c15t uses a `MutationObserver` to watch for dynamically added iframes. Any iframe with `data-category` added to the DOM after initialization is automatically processed.

## API Reference

|Property|Value|
|:--|:--|
|Type Name|\`FrameProps\`|
|Source Path|\`./packages/react/src/components/frame/types.ts\`|

\*ExtractedTypeTable: Could not extract "FrameProps" from "./packages/react/src/components/frame/types.ts" using base path "/home/runner/work/c15t/c15t". Verify the path/name and that the file is included by your tsconfig.\*