看 https://github.com/BaksiLi/AlfredWorkflows/blob/master/Index/DarkOrLight/DarkOrLight.sh 里面的
Script="tell app \"System Events\" to tell appearance preferences to set dark mode to $dark"
osascript -e "$Script"应该在 JS 里面调用 exec 就好了，以后写 Electron 应用可能会用到。