> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/get-started/readme/react-and-webviewer.md).

# React and WebViewer

Learn how to integrate WebViewer into a React app.

Content.

{% tabs %}
{% tab title="JavaScript" %}
{% code overflow="wrap" lineNumbers="true" %}

```javascript
import { useEffect, useRef } from 'react';
import WebViewer from '@pdftron/webviewer';

function App() {
  // Create reference to DOM element where WebViewer will mount
  const viewerRef = useRef(null);

  useEffect(() => {
    // Initialize WebViewer once when component mounts
    WebViewer(
      {
        // Path to copied WebViewer static assets
        path: '/lib/webviewer',
        // Replace with your Apryse license key
        licenseKey: 'YOUR_LICENSE_KEY',
        // Initial document to load when WebViewer starts (optional)
        initialDoc: 'https://pdftron.s3.amazonaws.com/downloads/pl/demo-annotated.pdf',
      },
      // Attach WebViewer to container element
      viewerRef.current
    ).then((instance) => {
      // Access WebViewer instance here if needed
      // const { UI, Core } = instance;
    });
  // Empty dependency array ensures this runs only once  
  }, []);
  return (
    // Container element for WebViewer
    <div
	    ref={viewerRef}
	    style={{ height: '100vh', width: '100%', margin: '0 auto' }}
	  />
  );
}

export default App;
```

{% endcode %}
{% endtab %}
{% endtabs %}

{% hint style="info" %}
sfjskfjk
{% endhint %}

|   |   |   |
| - | - | - |
|   |   |   |
|   |   |   |
|   |   |   |

{% tabs %}
{% tab title="First Tab" %}

{% endtab %}

{% tab title="windows" %}

{% endtab %}

{% tab title="Untitled" %}

{% endtab %}
{% endtabs %}

{% code lineNumbers="true" %}

```mermaid
graph TD
  Mermaid --> Diagram
```

{% endcode %}


---

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