Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

if ( mw.config.get( 'wgCanonicalSpecialPageName' ) === 'Watchlist' ) {
    document.body.classList.add( 'mw-rcfilters-ui-initialized' );
}

function copyToClipboard(element) {
  var $temp = $("<input>");
  $("body").append($temp);
  $temp.val($(element).text()).select();
  document.execCommand("copy");
  $temp.remove();
}