summaryrefslogtreecommitdiffstats
path: root/docs/content/en/variables/page.md
blob: b489bd9e2aa3640b82215e3a32794115d2fa0736 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
---
title: Page Variables
linktitle:
description: Page-level variables are defined in a content file's front matter, derived from the content's file location, or extracted from the content body itself.
date: 2017-02-01
publishdate: 2017-02-01
lastmod: 2017-02-01
categories: [variables and params]
keywords: [pages]
draft: false
menu:
  docs:
    title: "variables defined by a page"
    parent: "variables"
    weight: 20
weight: 20
sections_weight: 20
aliases: []
toc: true
---

The following is a list of page-level variables. Many of these will be defined in the front matter, derived from file location, or extracted from the content itself.

{{% note "`.Scratch`" %}}
See [`.Scratch`](/functions/scratch/) for page-scoped, writable variables.
{{% /note %}}

## Page Variables

.AlternativeOutputFormats
: contains all alternative formats for a given page; this variable is especially useful `link rel` list in your site's `<head>`. (See [Output Formats](/templates/output-formats/).)

.Aliases
: aliases of this page

.BundleType
: the [bundle] type: `leaf`, `branch`, or an empty string if the page is not a bundle.

.Content
: the content itself, defined below the front matter.

.Data
: the data specific to this type of page.

.Date
: the date associated with the page; `.Date` pulls from the `date` field in a content's front matter. See also `.ExpiryDate`, `.PublishDate`, and `.Lastmod`.

.Description
: the description for the page.

.Draft
: a boolean, `true` if the content is marked as a draft in the front matter.

.ExpiryDate
: the date on which the content is scheduled to expire; `.ExpiryDate` pulls from the `expirydate` field in a content's front matter. See also `.PublishDate`, `.Date`, and `.Lastmod`.

.File
: filesystem-related data for this content file. See also [File Variables][].

.FuzzyWordCount
: the approximate number of words in the content.

.IsHome
: `true` in the context of the [homepage](/templates/homepage/).

.IsNode
: always `false` for regular content pages.

.IsPage
: always `true` for regular content pages.

.IsSection
: `true` if [`.Kind`](/templates/section-templates/#page-kinds) is `section`.

.IsTranslated
: `true` if there are translations to display.

.Keywords
: the meta keywords for the content.

.Kind
: the page's *kind*. Possible return values are `page`, `home`, `section`, `taxonomy`, or `term`. Note that there are also `RSS`, `sitemap`, `robotsTXT`, and `404` kinds, but these are only available during the rendering of each of these respective page's kind and therefore *not* available in any of the `Pages` collections.

.Language
: a language object that points to the language's definition in the site `config`. `.Language.Lang` gives you the language code.

.Lastmod
: the date the content was last modified. `.Lastmod` pulls from the `lastmod` field in a content's front matter.

 - If `lastmod` is not set, and `.GitInfo` feature is disabled, the front matter `date` field will be used.
 - If `lastmod` is not set, and `.GitInfo` feature is enabled, `.GitInfo.AuthorDate` will be used instead.

See also `.ExpiryDate`, `.Date`, `.PublishDate`, and [`.GitInfo`][gitinfo].

.LinkTitle
: access when creating links to the content. If set, Hugo will use the `linktitle` from the front matter before `title`.

.Next
: Points up to the next [regular page](/variables/site/#site-pages) (sorted by Hugo's [default sort](/templates/lists#default-weight-date-linktitle-filepath)). Example: `{{with .Next}}{{.Permalink}}{{end}}`. Calling `.Next` from the first page returns `nil`.

.NextInSection
: Points up to the next [regular page](/variables/site/#site-pages) below the same top level section (e.g. in `/blog`)). Pages are sorted by Hugo's [default sort](/templates/lists#default-weight-date-linktitle-filepath). Example: `{{with .NextInSection}}{{.Permalink}}{{end}}`. Calling `.NextInSection` from the first page returns `nil`.

.OutputFormats
: contains all formats, including the current format, for a given page. Can be combined the with [`.Get` function](/functions/get/) to grab a specific format. (See [Output Formats](/templates/output-formats/).)

.Pages
: a collection of associated pages. This value will be `nil` within
  the context of regular content pages. See [`.Pages`](#pages).

.Permalink
: the Permanent link for this page; see [Permalinks](/content-management/urls/)

.Plain
: the Page content stripped of HTML tags and presented as a string.

.PlainWords
: the slice of strings that results from splitting .Plain into words, as defined in Go's [strings.Fields](https://golang.org/pkg/strings/#Fields).

.Prev
: Points down to the previous [regular page](/variables/site/#site-pages) (sorted by Hugo's [default sort](/templates/lists#default-weight-date-linktitle-filepath)). Example: `{{if .Prev}}{{.Prev.Permalink}}{{end}}`.  Calling `.Prev` from the last page returns `nil`.

.PrevInSection
: Points down to the previous [regular page](/variables/site/#site-pages) below the same top level section (e.g. `/blog`). Pages are sorted by Hugo's [default sort](/templates/lists#default-weight-date-linktitle-filepath). Example: `{{if .PrevInSection}}{{.PrevInSection.Permalink}}{{end}}`.  Calling `.PrevInSection` from the last page returns `nil`.

.PublishDate
: the date on which the content was or will be published; `.Publishdate` pulls from the `publishdate` field in a content's front matter. See also `.ExpiryDate`, `.Date`, and `.Lastmod`.

.RawContent
: raw markdown content without the front matter. Useful with [remarkjs.com](
https://remarkjs.com)

.ReadingTime
: the estimated time, in minutes, it takes to read the content.

.Resources
: resources such as images and CSS that are associated with this page

.Ref
: returns the permalink for a given reference (e.g., `.Ref "sample.md"`).  `.Ref` does *not* handle in-page fragments correctly. See [Cross References](/content-management/cross-references/).

.RelPermalink
: the relative permanent link for this page.

.RelRef
: returns the relative permalink for a given reference (e.g., `RelRef
"sample.md"`). `.RelRef` does *not* handle in-page fragments correctly. See [Cross References](/content-management/cross-references/).

.Site
: see [Site Variables](/variables/site/).

.Sites
: returns all sites (languages). A typical use case would be to link back to the main language: `<a href="{{ .Sites.First.Home.RelPermalink }}">...</a>`.

.Sites.First
: returns the site for the first language. If this is not a multilingual setup, it will return itself.

.Summary
: a generated summary of the content for easily showing a snippet in a summary view. The breakpoint can be set manually by inserting <code>&lt;!&#x2d;&#x2d;more&#x2d;&#x2d;&gt;</code> at the appropriate place in the content page, or the summary can be written independent of the page text.  See [Content Summaries](/content-management/summaries/) for more details.

.TableOfContents
: the rendered [table of contents](/content-management/toc/) for the page.

.Title
: the title for this page.

.Translations
: a list of translated versions of the current page. See [Multilingual Mode](/content-management/multilingual/) for more information.

.TranslationKey
: the key used to map language translations of the current page. See [Multilingual Mode](/content-management/multilingual/) for more information.

.Truncated
: a boolean, `true` if the `.Summary` is truncated. Useful for showing a "Read more..." link only when necessary.  See [Summaries](/content-management/summaries/) for more information.

.Type
: the [content type](/content-management/types/) of the content (e.g., `posts`).

.Weight
: assigned weight (in the front matter) to this content, used in sorting.

.WordCount
: the number of words in the content.

## Section Variables and Methods

Also see [Sections](/content-management/sections/).

{{< readfile file="/content/en/readfiles/sectionvars.md" markdown="true" >}}

## The `.Pages` Variable {#pages}

`.Pages` is an alias to `.Data.Pages`. It is conventional to use the
aliased form `.Pages`.

### `.Pages` compared to `.Site.Pages`

{{< getcontent path="readfiles/pages-vs-site-pages.md" >}}

## Page-level Params

Any other value defined in the front matter in a content file, including taxonomies, will be made available as part of the `.Params` variable.

```
---
title: My First Post
date: 2017-02-20T15:26:23-06:00
categories: [one]
tags: [two,three,four]
```

With the above front matter, the `tags` and `categories` taxonomies are accessible via the following:

* `.Params.tags`
* `.Params.categories`

{{% note "Casing of Params" %}}
Page-level `.Params` are *only* accessible in lowercase.
{{% /note %}}

The `.Params` variable is particularly useful for the introduction of user-defined front matter fields in content files. For example, a Hugo website on book reviews could have the following front matter in `/content/review/book01.md`:

```
---
...
affiliatelink: "http://www.my-book-link.here"
recommendedby: "My Mother"
...
---
```

These fields would then be accessible to the `/themes/yourtheme/layouts/review/single.html` template through `.Params.affiliatelink` and `.Params.recommendedby`, respectively.

Two common situations where this type of front matter field could be introduced is as a value of a certain attribute like `href=""` or by itself to be displayed as text to the website's visitors.

{{< code file="/themes/yourtheme/layouts/review/single.html" >}}
<h3><a href={{ printf "%s" $.Params.affiliatelink }}>Buy this book</a></h3>
<p>It was recommended by {{ .Params.recommendedby }}.</p>
{{< /code >}}

This template would render as follows, assuming you've set [`uglyURLs`](/content-management/urls/) to `false` in your [site `config`](/getting-started/configuration/):

{{< output file="yourbaseurl/review/book01/index.html" >}}
<h3><a href="http://www.my-book-link.here">Buy this book</a></h3>
<p>It was recommended by my Mother.</p>
{{< /output >}}

{{% note %}}
See [Archetypes](/content-management/archetypes/) for consistency of `Params` across pieces of content.
{{% /note %}}

### The `.Param` Method

In Hugo, you can declare params in individual pages and globally for your entire website. A common use case is to have a general value for the site param and a more specific value for some of the pages (i.e., a header image):

```
{{ $.Param "header_image" }}
```

The `.Param` method provides a way to resolve a single value according to it's definition in a page parameter (i.e. in the content's front matter) or a site parameter (i.e., in your `config`).

### Access Nested Fields in Front Matter

When front matter contains nested fields like the following:

```
---
author:
  given_name: John
  family_name: Feminella
  display_name: John Feminella
---
```
`.Param` can access these fields by concatenating the field names together with a dot:

```
{{ $.Param "author.display_name" }}
```

If your front matter contains a top-level key that is ambiguous with a nested key, as in the following case:

```
---
favorites.flavor: vanilla
favorites:
  flavor: chocolate
---
```

The top-level key will be preferred. Therefore, the following method, when applied to the previous example, will print `vanilla` and not `chocolate`:

```
{{ $.Param "favorites.flavor" }}
=> vanilla
```

[gitinfo]: /variables/git/
[File Variables]: /variables/files/
[bundle]: {{< relref "content-management/page-bundles" >}}