themes/themeName/layouts/shortcodes/setColor.html├── layouts
| ├── shortcodes
| | └── setColor.html
setColor.html 的內容{{ $color := default "blue" (.Get "color") }}
<span style='color: {{ $color }}'>
{{ .Inner }}
</span>
<>與{{}}之間的空白 ){{ <setColor color="red"> }} 有給 color，所以字的顏色是 red {{ </setColor> }}
{{ <setColor> }} 沒給 color，所以字的顏色是 blue {{ </setColor> }}