Hexo next 主题加载自定义 js 文件

为什么要配置 hexo next 主题自定义 js 文件呢？主要原因有两点：

不可靠：加载第三方站点的 js 依赖其站点的稳定性，如果第三方站点给挂了或者不维护了，那么加载的地址就失效了，访问直接 404… 比如最近就遇到 next 主题”不蒜子”文章 PV 统计功能用不了了，Chrome 抓包发现 https://dn-lbstatics.qbox.me/busuanzi/2.3/busuanzi.pure.mini.js 这个地址 404 了，看了 “不蒜子”官方 blog 通知才发现原来换成了 https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js。
加载速度慢：比如之前将 gitalk 功能用到的 https://rawgit.com/qhh0205/78e9e0b1f3114db6737f3ed8cdd51d3a/raw/3894c5be5aa2378336b1f5ee0f296fa0b22d06e9/md5.min.js 文件嵌入到主题，发现每次打开 blog 网站都加载很慢，Chrome 抓包发现是该文件加载缓慢，一直 pending 很久…

那么解决上面两个问题的办法就是可以将远程加载的 js 文件下载下来，放到本地 netx 主题 source/js/src/ 目录下，让 hexo 生成静态网站时，加载生成静态站点本身的 js。下面举两个例子。

next 主题 gitalk 评论功能加载自定义 js

将 https://github.com/blueimp/JavaScript-MD5/blob/master/js/md5.min.js 文件下载下来放到 themes/next/source/js/src/ 路径下。

修改 themes/next/layout/_third-party/comments/gitalk.swig，加载 md5.min.js 改为 <script src="/js/src/md5.min.js"></script>：

{% if page.comments && theme.gitalk.enable %}
  <link rel="stylesheet" href="https://unpkg.com/gitalk/dist/gitalk.css">
  <script src="https://unpkg.com/gitalk/dist/gitalk.min.js"></script>
  <script src="/js/src/md5.min.js"></script>
   <script type="text/javascript">
        var gitalk = new Gitalk({
          clientID: '3840ba8c8d80c18be7e3',
          clientSecret: '1b00f2efe5285973c24da9ed9ac895775eacc8ea',
          repo: '{{ theme.gitalk.repo }}',
          owner: '{{ theme.gitalk.githubID }}',
          admin: ['{{ theme.gitalk.adminUser }}'],
          id: md5(location.pathname),
          distractionFreeMode: '{{ theme.gitalk.distractionFreeMode }}'
        })
        gitalk.render('gitalk-container')
    </script>
{% endif %}

next 主题 “不蒜子” PV 统计功能加载自定义 js

将 https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js 文件下载
下来放到 themes/next/source/js/src/ 路径下。

修改 themes/next/layout/_third-party/analytics/busuanzi-counter.swig，将原先 <script async src="https://dn-lbstatics.qbox.me/busuanzi/2.3/busuanzi.pure.mini.js"></script> 改为 <script async src="/js/src/busuanzi.pure.mini.js"></script>：

{% if theme.busuanzi_count.enable %}
<div class="busuanzi-count">
  <script async src="/js/src/busuanzi.pure.mini.js"></script>

  {% if theme.busuanzi_count.site_uv %}
    <span class="site-uv">
      {{ theme.busuanzi_count.site_uv_header }}
      <span class="busuanzi-value" id="busuanzi_value_site_uv"></span>
      {{ theme.busuanzi_count.site_uv_footer }}
    </span>
  {% endif %}

  {% if theme.busuanzi_count.site_pv %}
    <span class="site-pv">
      {{ theme.busuanzi_count.site_pv_header }}
      <span class="busuanzi-value" id="busuanzi_value_site_pv"></span>
      {{ theme.busuanzi_count.site_pv_footer }}
    </span>
  {% endif %}
</div>
{% endif %}

配置完成后需要 hexo clean && hexo g 生效…

附件

怕以下两个远程站点 js 丢了，在此备份一下吧…
https://github.com/blueimp/JavaScript-MD5/blob/master/js/md5.min.js：

1
2

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//# sourceMappingURL=md5.min.js.map

https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js:

var bszCaller,bszTag;!function(){var c,d,e,a=!1,b=[];ready=function(c){return a||"interactive"===document.readyState||"complete"===document.readyState?c.call(document):b.push(function(){return c.call(this)}),this},d=function(){for(var a=0,c=b.length;c>a;a++)b[a].apply(document);b=[]},e=function(){a||(a=!0,d.call(window),document.removeEventListener?document.removeEventListener("DOMContentLoaded",e,!1):document.attachEvent&&(document.detachEvent("onreadystatechange",e),window==window.top&&(clearInterval(c),c=null)))},document.addEventListener?document.addEventListener("DOMContentLoaded",e,!1):document.attachEvent&&(document.attachEvent("onreadystatechange",function(){/loaded|complete/.test(document.readyState)&&e()}),window==window.top&&(c=setInterval(function(){try{a||document.documentElement.doScroll("left")}catch(b){return}e()},5)))}(),bszCaller={fetch:function(a,b){var c="BusuanziCallback_"+Math.floor(1099511627776*Math.random());window[c]=this.evalCall(b),a=a.replace("=BusuanziCallback","="+c),scriptTag=document.createElement("SCRIPT"),scriptTag.type="text/javascript",scriptTag.defer=!0,scriptTag.src=a,document.getElementsByTagName("HEAD")[0].appendChild(scriptTag)},evalCall:function(a){return function(b){ready(function(){try{a(b),scriptTag.parentElement.removeChild(scriptTag)}catch(c){bszTag.hides()}})}}},bszCaller.fetch("//busuanzi.ibruce.info/busuanzi?jsonpCallback=BusuanziCallback",function(a){bszTag.texts(a),bszTag.shows()}),bszTag={bszs:["site_pv","page_pv","site_uv"],texts:function(a){this.bszs.map(function(b){var c=document.getElementById("busuanzi_value_"+b);c&&(c.innerHTML=a[b])})},hides:function(){this.bszs.map(function(a){var b=document.getElementById("busuanzi_container_"+a);b&&(b.style.display="none")})},shows:function(){this.bszs.map(function(a){var b=document.getElementById("busuanzi_container_"+a);b&&(b.style.display="inline")})}};