title: How to export google chart in pdf?
body: <p>I have draw google chart. Now, I want to put button to save the chart in pdf format. I do look from here <a href="https://stackoverflow.com/questions/32102992/save-google-charts-as-pdf">Save google charts as pdf</a> and other questions available in stack but it doesn't work.</p>
  
  <p>Print png image by google chart already used but it just open a new tab with the png image but it doesnt open the save as pdf window for user.</p>
  
  <p>Do anyone knows any ways to do it?</p>