> 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/samples/flipbook.md).

# Create a JavaScript PDF Viewer Flipbook and Page Flip Effect

Convert your PDF to a Flipbook using JavaScript by extracting the canvas of each page & utilize the turn.js library to render them in a web browser.

{% hint style="info" %}
**Requirements**

*These packages are required to use these features in production. Trial keys have unlimited access to all features*

<a href="/web/get-started/readme.md" class="button primary">Web SDK</a><a href="https://showcase.apryse.com/online-flipbook" class="button primary">Live demo</a>
{% endhint %}

Create a Flipbook using JavaScript by extracting the canvas of each page in your PDF, Word, or PowerPoint file and utilize the turn.js library to render them (no servers or other external dependencies required). Users can navigate between pages by clicking and dragging the corners of a page. This sample works on all browsers (including IE11) and mobile devices without using plug-ins.

Learn more about our [Web SDK](/web/get-started/guides.md).

Once you generate your license key, it will automatically be included in your sample code below.

{% @apryse-license-key/apryse-license-key platform="WEB\_VIEWER" variant="compact" %}

<pre class="language-js" data-line-numbers><code class="lang-js">Core.setWorkerPath('../../../lib/core');

const flipbookElement = document.getElementById('flipbook');
const loadingMessageElement = document.getElementById('loading-message');
loadingMessageElement.innerHTML = 'Preparing document...';
const source = 'https://pdftron.s3.amazonaws.com/downloads/pl/Cheetahs.pdf';
const options = { l: '<code class="expression">visitor.claims.wvKey || "YOUR_LICENSE_KEY"</code>' };
const docViewer = new Core.DocumentViewer();
const viewerElement = document.createElement('div');

docViewer.setViewerElement(viewerElement);
docViewer.setScrollViewElement(viewerElement);
docViewer.enableAnnotations();
docViewer.addEventListener('annotationsLoaded', () => {
  const doc = docViewer.getDocument();
  const annotManager = docViewer.getAnnotationManager();
  const info = doc.getPageInfo(1);
  const width = info.width;
  const height = info.height;
  const pageCount = doc.getPageCount();
  const promises = [];
  const canvases = [];
  const boundingRect = flipbookElement.getBoundingClientRect();

  let flipbookHeight = boundingRect.height;
  let flipbookWidth = boundingRect.width;
  if (((flipbookHeight * width) / height) * 2 &#x3C; flipbookWidth) {
    flipbookWidth = ((flipbookHeight * width) / height) * 2;
  } else {
    flipbookHeight = ((flipbookWidth / width) * height) / 2;
  }

  for (let i = 0; i &#x3C; pageCount; i++) {
    promises.push(
      /* eslint-disable-next-line no-loop-func */
      new Promise(resolve => {
        // Load page canvas
        const pageNumber = i + 1;
        return doc.requirePage(pageNumber).then(() => {
          return doc.loadCanvas({
            pageNumber,
            drawComplete: async (canvas, index) => {
              canvases.push({ index, canvas });
              loadingMessageElement.innerHTML = `Loading page canvas... (${canvases.length}/${pageCount})`;
              await annotManager.drawAnnotations(index, canvas);
              resolve();
            },
          });
        });
      })
    );
  }

  Promise.all(promises).then(() => {
    flipbookElement.removeChild(loadingMessageElement);
    flipbookElement.style.margin = '60px 0px 0px auto';

    canvases.sort((a, b) => a.index - b.index).forEach(o => flipbookElement.appendChild(o.canvas));

    $('#flipbook').turn({
      width: flipbookWidth,
      height: flipbookHeight,
    });

    setTimeout(() => {
      $('#flipbook').turn('next');
    }, 500);

    document.getElementById('previous').onclick = () => {
      $('#flipbook').turn('previous');
    };

    document.getElementById('next').onclick = () => {
      $('#flipbook').turn('next');
    };
  });
});
docViewer.loadDocument(source, options);
</code></pre>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.apryse.com/web/get-started/samples/flipbook.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.