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Refresh/Clear NBViewer Cache

Add a button to navigation bar to refresh/clear the cache of nbviewer

  1. // ==UserScript==
  2. // @name        Refresh/Clear NBViewer Cache
  3. // @namespace   https://peijunz.github.io
  4. // @author      Peijun Zhu
  5. // @description Add a button to navigation bar to refresh/clear the cache of nbviewer
  6. // @include     *://nbviewer.jupyter.org/*.ipynb*
  7. // @version     2.4.1
  8. // @grant       none
  9. // @icon        https://github.com/jupyter/design/raw/master/logos/Square%20Logo/squarelogo-greytext-orangebody-greymoons/squarelogo-greytext-orangebody-greymoons.png
  10. // ==/UserScript==
  11. function flush() {
  12.   var url = document.location.href;
  13.   while (url.substr( - 1) === '/' || url.substr( - 1) === '#') {
  14.     //Strip # or / in the end
  15.     url = url.substr(0, url.length - 1);
  16.   }
  17.   var tail = '?flush_cache=true';
  18.   if (!url.endsWith(tail)) {
  19.     document.location.href = url + tail;
  20.   } 
  21.   else {
  22.     document.location.reload();
  23.   }
  24. }
  25. function add_flush_button() {
  26.   var lu = document.getElementsByClassName('nav navbar-nav navbar-right') [0];
  27.   var li = document.createElement('li');
  28.   var a = document.createElement('a');
  29.   li.appendChild(a);
  30.   lu.appendChild(li);
  31.   a.href = '#';
  32.   a.onclick = flush;
  33.   a.innerHTML = '⟳';
  34.   a.style['font-size']="2.5em";
  35. }
  36. add_flush_button();