为 butterfly 主题的 twikoo 添加图片点击放大功能

twikoo.init(Object.assign({
  el: '#twikoo-wrap',
  envId: '!{theme.twikoo.envId}',
  region: '!{theme.twikoo.region}',
  onCommentLoaded: function () {
    if(typeof window.mediumZoom!='undefined'){
      const zoomComment = mediumZoom(document.querySelectorAll('.tk-content :not(a)>img'))
      zoomComment.on('open', e => {
        const photoBg = document.documentElement.getAttribute('data-theme') === 'dark' ? '#121212' : '#fff'
        zoomComment.update({
          background: photoBg
        })
      })
    }
    if(GLOBAL_CONFIG.lightbox === 'fancybox'){
        const addFancybox = function (ele) {
          const runFancybox = (ele) => {
            ele.each(function (i, o) {
              const $this = $(o)
              const lazyloadSrc = $this.attr('data-lazy-src') || $this.attr('src')
              const dataCaption = $this.attr('alt') || ''
              $this.wrap(`<a href="${lazyloadSrc}" data-fancybox="group" data-caption="${dataCaption}" class="fancybox"></a>`)
            })

            $().fancybox({
              selector: '[data-fancybox]',
              loop: true,
              transitionEffect: 'slide',
              protect: true,
              buttons: ['slideShow', 'fullScreen', 'thumbs', 'close'],
              hash: false
            })
          }

          if (typeof $.fancybox === 'undefined') {
            $('head').append(`<link rel="stylesheet" type="text/css" href="${GLOBAL_CONFIG.source.fancybox.css}">`)
            $.getScript(`${GLOBAL_CONFIG.source.fancybox.js}`, function () {
              runFancybox($(ele))
            })
          } else {
            runFancybox($(ele))
          }
        }
      addFancybox(document.querySelectorAll('.tk-content :not(a)>img'))
    }
  }
}, !{JSON.stringify(theme.twikoo.option)}))