Impressive that this is pure JS, however trying an image cut from the page itself gave this result
> Dropan Enghsh Wage on (Ms page to OCR m
Should be
> Drop an English image on this page to OCR it!
> Dropan Enghsh Wage on (Ms page to OCR m
Should be
> Drop an English image on this page to OCR it!
Well it's pure JS in that it's been running the C tesseract through emscripten. So in a way it's pure JS just as much as the original lib is pure assembly when compiled ;-)
It should work better if you feed it a screenshot of the black text at the top of the demo page though (Tesseract.js is a pure Javascript port etc...).