MediaWiki:Common.js

Note: After publishing, you may have to bypass your browser's cache to see the changes.

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Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
Opera: Press Ctrl-F5.

$(function () {

  var myElement = document.getElementById('mw-mywiki-example');
  myElement.innerHTML = '<p>hello world</p>';

}());