Print.JS - 设置默认打印设置

Question

I am trying to implement a print PDF option in an application. I found print.js and looks like this may help. However, I want to set default print options to make sure it prints to the correct scale (ie. 100%). Can print.js do this? If not, does anyone have a suggestion on how to accomplish this?

Answer 1

Not sure if this can be achieved straight forward or not. However there is a workaround for which you need to follow these steps:

1. Convert your pdf files in base64 format
2. Convert your base64 pdf to base64 png using pdf.js
3. Render base64 pngs as html in img tag where you application related styles like margin, scales, etc. can be applied
4. Print your html content with print.js

You can check this article solving similar type of problem https://medium.com/@vicky.sharma8127344/print-single-or-multiple-files-with-print-js-and-pdf-js-ab9c8347a309