Invoice Processing UI is a combination of HTML, CSS, jQuery, JS and a very nice PDF viewer. The pdf viewer is done by the project PDF.JS (by Mozilla). PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5. The library is available from https://github.com/mozilla/pdf.js

The UI shows a pdf viewer on the left side. The viewer was reduced to offer the following features:

• Zoom in and Zoom out by buttons "-" and "+"
• Zoom in and Zoom out by selecting the value from a dropdown menu
• Thumbnail View
• Scroll by using number pages or scroll bar

The right side is populated by extracted data which is loaded from a JSON file. The features included are:

• Delete the rows
• Add new rows
• Add colors to extracted data based on the property "confidence" included in the JSON file