Template composition

As templates grow, they may become repetitive. To reduce such repetition, the Go template system offers named blocks (components) that can be reused within a template, just like functions in a program. Then, the final template can be composed of these components.

How to do it...

You can create template “components” that you can reuse in multiple contexts. To define a named template, use the {{define "name"}} construct:

{{define "template1"}}
  ...
{{end}}
{{define "template2"}}
 ...
{{end}}

Then, call that template using the {{template "name" .}} construct as if it is a function with a single argument:

{{template "template1" .}}
{{range .List}}
  {{template "template2" .}}
{{end}}

How it works...

The following example prints a book list using a named template:

package main
import (
     "os"
    ...