mirror/hugo
1
0
Fork 0
mirror of https://github.com/gohugoio/hugo.git synced 2025-08-24 21:56:05 +02:00
Code Issues Packages Projects Releases Wiki Activity

Merge commit 'f96384a3b596f9bc0a3a035970b09b2c601f0ccb'

Browse Source
This commit is contained in:
Bjørn Erik Pedersen
2023-05-22 16:47:07 +02:00
parent 4cac5f5e30 f96384a3b5
commit b95e156940
341 changed files with 3107 additions and 4238 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
docs/content/en/functions/isset.md
View File

@@ -1,30 +1,22 @@
---
title: isset
linktitle: isset
description: Returns true if the parameter is set.
date: 2017-02-01
publishdate: 2017-02-01
lastmod: 2017-02-01
categories: [functions]
menu:
docs:
parent: "functions"
parent: functions
keywords: []
signature: ["isset COLLECTION INDEX", "isset COLLECTION KEY"]
workson: []
hugoversion:
relatedfuncs: []
deprecated: false
aliases: []
---
Takes either a slice, array, or channel and an index or a map and a key as input.
```
```go-html-template
{{ if isset .Params "project_url" }} {{ index .Params "project_url" }}{{ end }}
```
{{% warning %}}
All site-level configuration keys are stored as lower case. Therefore, a `myParam` key-value set in your [site configuration file](/getting-started/configuration/) needs to be accessed with `{{if isset .Site.Params "myparam"}}` and *not* with `{{if isset .Site.Params "myParam"}}`. Note that you can still access the same config key with `.Site.Params.myParam` *or* `.Site.Params.myparam`, for example, when using [`with`](/functions/with).
{{% note %}}
All site-level configuration keys are stored as lower case. Therefore, a `myParam` key-value set in your [site configuration file](/getting-started/configuration/) needs to be accessed with `{{ if isset .Site.Params "myparam" }}` and *not* with `{{ if isset .Site.Params "myParam" }}`. Note that you can still access the same config key with `.Site.Params.myParam` *or* `.Site.Params.myparam`, for example, when using [`with`](/functions/with).
This restriction also applies when accessing page-level front matter keys from within [shortcodes](/content-management/shortcodes/).
{{% /warning %}}
{{% /note %}}