This is a very advanced usecase.

If you want to implement your own find algorithm, define a class implementing the find controller and pass it to the attribute pdfDefaultOptions.findController before opening the PDF file.

To get started, copy the files pdf_find_controller.js, ui_utils.js, and pdf_find_utils.js from the source code of this showcase to your project and extend your own find controller from the class PDFFindController.

The live demo below doesn't do much. It only prints console messages when the custom find controller is instantiated and when the find algorithm is called.