MediaWiki:Common.js

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

var imgUrl = '/blog/Special:FilePath/扫码关注清冽之泉微信公众号.jpg';

var html =
  '<div class="wechat-qr">' +
    '<a href="' + imgUrl + '" target="_blank" rel="noopener">' +
      '<img src="' + imgUrl + '" alt="扫码关注清冽之泉微信公众号">' +
    '</a>' +
    '<div class="caption">扫码关注清冽之泉微信公众号</div>' +
  '</div>';

$('.mw-parser-output').append(html);