WebViewer - React - CanvasToPDF sample

WebViewer is a powerful JavaScript-based PDF Library that's part of the PDFTron PDF SDK. It provides a slick out-of-the-box responsive UI that interacts with the core library to view, annotate and manipulate PDFs that can be embedded into any web project.

WebViewer UI

CanvasToPDF is a PDF Library that allows users to create vector appearances with Canvas API. In other words, enable you to export your HTML Canvas to a vector quality PDF.

This repo is specifically designed for any users interested in integrating WebViewer and CanvasToPDF into React project.

Demo

In the App.js file, you will see several sample draw functions already implemented to see how the CanvasToPDF api can be used.

There are 5 sample draw functions:

  • drawRect
  • drawGradientCircles
  • drawTriangles
  • drawHatch
  • drawTiger

Gradient Pattern Annotation

const blob = await canvasToPDF(drawGradientCircles, {
  width: rectangleAnnot.Width,
  height: rectangleAnnot.Height,
});

Screen Shot 2022-08-25 at 3 26 49 PM

You can use them by replacing the above code to the below code like this:

Hatch Annotation

const blob = await canvasToPDF(drawHatch, {
  width: rectangleAnnot.Width,
  height: rectangleAnnot.Height,
});

Screen Shot 2022-08-25 at 3 27 36 PM

Initial setup

Before you begin, make sure your development environment includes Node.js.

Install

git clone https://github.com/ajo01/canvasToPDF-webviewer-react-sample.git
cd webviewer-react-sample
npm install

Run

npm start

After the app starts, you will be able to see WebViewer running on localhost:3006.

Build

Run npm run build to build the project. The build artifacts will be stored in the build/ directory. See the section about deployment for more information.

To test the build directory locally you can use serve or http-server. In case of serve, by default it strips the .html extension stripped from paths. We added serve.json configuration to disable cleanUrls option.

GitHub Pages

You can deploy your app to GitHub Pages. To do so, make sure to update paths accordingly, for example, to deploy on pdftron.github.io/webviewer-react-sample, modify the path:

WebViewer(
 {
   path: '/webviewer-react-sample/webviewer/lib',
   initialDoc: '/webviewer-react-sample/files/PDFTRON_about.pdf',
 },
 viewer.current,
).then((instance) => {

WebViewer APIs

See API documentation.

Contributing

See contributing.

License

See license.