在新窗口中打开PDF并在Rails 4中调用window.print（）

Question

My objective is for the user to click on a link which right now currently calls a controller action and returns send_data(label.pdf_text, type: 'application/pdf', disposition: 'inline') This displays the pdf in its own window.

What I want to do is when the link_to is pressed, it calls the controller action to open up a dummy html file which automatically calls in javascript, window.print();

So in this case, link is pressed and opens up the pdf in a new window/tab and immediately calls the window.print(); javascript function to show a print preview.

Any suggestions?

Answer 1

Add this js to your html file witch contains pdf:

<script>
  function ready() {
    window.print();
  }

  document.addEventListener("DOMContentLoaded", ready)
</script>

ready function will be launch and call window.print(); after your html page is load