os.ReadDir

Returns an array of FileInfo structures sorted by file name, one element for each directory entry.

The os.ReadDir function resolves the path relative to the root of your project directory. A leading path separator (/) is optional.

With this directory structure:

content/
├── about.md
├── contact.md
└── news/
    ├── article-1.md
    └── article-2.md

This template code:

{{ range readDir "content" }}
  {{ .Name }} → {{ .IsDir }}
{{ end }}

Produces:

about.md → false
contact.md → false
news → true

Note that os.ReadDir is not recursive.

Details of the FileInfo structure are available in the Go documentation.