MediaWiki:Common.js

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

var headers = document.querySelectorAll('.mw-headline');
for(var i = 0; i < headers.length; i++){
  headers[i].setAttribute('class', 'anchorlink');
  var link = document.createElement('a');
  link.textContent = 'Link';
  link.setAttribute('href', '#' + headers[i].getAttribute('id'));
  headers[i].appendChild(link);
}