Merge branch 'dev' of https://github.com/jerryc127/hexo-theme-butterfly into dev

layout/includes/layout.pug

@@ -13,7 +13,29 @@ html(lang=config.language data-theme=theme.display_mode class=htmlClassHideAside
     !=partial('includes/loading/index', {}, {cache: true})
 
     if theme.background
-      #web_bg(style=getBgPath(theme.background))
+      if !Array.isArray(theme.background)
+        #web_bg.bg-animation(style=getBgPath(theme.background))
+      else
+        #web_bg.bg-animation
+        - const bgStyleArr = theme.background.map(getBgPath)
+        script.
+          (() => {
+            const arr = !{JSON.stringify(bgStyleArr)}
+            const webBgDiv = document.getElementById('web_bg')
+
+            const setRandomBg = () => {
+              webBgDiv.style = arr[Math.floor(Math.random() * arr.length)]
+              requestAnimationFrame(() => webBgDiv.classList.add('bg-animation'))
+            }
+
+            document.addEventListener('pjax:send', () => {
+              webBgDiv.style = ''
+              webBgDiv.classList.remove('bg-animation')
+            })
+
+            document.addEventListener('pjax:complete', setRandomBg)
+            document.addEventListener('DOMContentLoaded', setRandomBg)
+          })()
 
     !=partial('includes/sidebar', {}, {cache: true})
 

layout/includes/pagination.pug

@@ -19,7 +19,7 @@ if page.total !== 1
 
           a.pagination-related(class=className href=url_for(direction.path) title=direction.title)
             if direction.cover_type === 'img'
-              img.cover(src=url_for(direction.cover) onerror=`onerror=null;src='${url_for(theme.error_img.post_page)}'` alt=`cover of ${key === 'prev' ? 'previous' : 'next'} post`)
+              img.cover(src=url_for(direction.pagination_cover || direction.cover) onerror=`onerror=null;src='${url_for(theme.error_img.post_page)}'` alt=`cover of ${key === 'prev' ? 'previous' : 'next'} post`)
             else
               .cover(style=`background: ${direction.cover || 'var(--default-bg-color)'}`)