User:J. 'mach' wust/global.js

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$(function () {
  // https://stackoverflow.com/a/37739187
  var x = document.getElementsByClassName('vector-toc-level-1');
  for (var i = 0; i < x.length; i++) {
    x[i].classList.add('vector-toc-list-item-expanded');
  }
}());