定制Hexo Next主题的vendors，加入darkmode.js。中文说明。

Customize vendors of the Hexo Theme Next, add darkmode.js into it.

Steps:

• modify .gitignore and add a line as below:

  !source/lib/darkmode-js
  

• add darkmode.js to submodule as your Next repository {blog_dir}/themes/next/

  git submodule add https://github.com/sandoche/Darkmode.js.git source/lib/darkmode-js/

• modify the config file as follows according to your preference (optional)
  • {blog_dir}/themes/next/languages/en.yml
  • next config file, which may have two different types according to the official doc
• add darkmode.js into vendors and customize it (see code here)
  • add code to {blog_dir}/themes/next/layout/_scripts/vendors.swig
  • add & set options below into next config file
    • make sure the default option darkmode is set to false
    • add darkmode-js option
    • add darkmode-js CDN specify option into vendors