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Published: May 30, 2017 License: Apache-2.0 Imports: 7 Imported by: 0



Package whtmpl provides some helpful utilities for constructing and using lots of html/templates



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type Collection

type Collection struct {
	// contains filtered or unexported fields

Collection is a useful type that helps when defining a bunch of html inside of Go files. Assuming you want to define a template called "landing" that references another template called "header". With a template collection, you would make three files:


   package views

   import "gopkg.in/webhelp.v1/whtmpl"

   var Templates = whtmpl.NewCollection()


   package views

   var _ = Templates.MustParse(`{{ template "header" . }}



   package views

   var _ = Templates.MustParse(`<title>My website!</title>`)

Note that MustParse determines the name of the template based on the go filename.

A template collection by default has two additional helper functions defined within templates:

  • makemap: creates a map out of the even number of arguments given.
  • makepair: creates a Pair type of its two given arguments.
  • makeslice: creates a slice of the given arguments.
  • safeurl: calls template.URL with its first argument and returns the result.

func NewCollection

func NewCollection() *Collection

Creates a new Collection.

func (*Collection) Funcs

func (tc *Collection) Funcs(m template.FuncMap) *Collection

Allows you to add and overwrite template function definitions. Mutates called collection and returns self.

func (*Collection) Lookup

func (tc *Collection) Lookup(name string) *template.Template

Lookup a template by name. Returns nil if not found.

func (*Collection) MustParse

func (tc *Collection) MustParse(tmpl string) *template.Template

MustParse parses template source "tmpl" and stores it in the Collection using the name of the go file that MustParse is called from.

func (*Collection) Parse

func (tc *Collection) Parse(name string, tmpl string) (
	*template.Template, error)

Parse parses the source "tmpl" and stores it in the template collection using name "name".

func (*Collection) Render

func (tc *Collection) Render(w http.ResponseWriter, r *http.Request,
	template string, values interface{})

Render writes the template out to the response writer (or any errors that come up), with value as the template value.

type Pair

type Pair struct {
	First, Second interface{}

Pair is a useful type that allows for passing more than one current template variable into a sub-template.

Expected usage within a template like:

{{ template "subtemplate" (makepair $val1 $val2) }}

Expected usage within the subtemplate like

{{ $val1 := .First }}
{{ $val2 := .Second }}

"makepair" is registered as a template function inside a Collection

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