Is this at all affiliated with the already-existing tesseract OCR library? It doesn't seem to be from my cursory check so if not you need to rename your library, because you're ripping off their name.
"Tesseract.js is a pure Javascript port of the popular Tesseract OCR engine." first sentence on http://tesseract.projectnaptha.com/ linked from the github page
https://github.com/tesseract-ocr/tesseract