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69 lines
1.6 KiB
Markdown
69 lines
1.6 KiB
Markdown
---
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title: safe.CSS
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description: Declares the given string as a safe CSS string.
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categories: []
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keywords: []
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action:
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aliases: [safeCSS]
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related:
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- functions/safe/HTML
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- functions/safe/HTMLAttr
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- functions/safe/JS
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- functions/safe/JSStr
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- functions/safe/URL
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returnType: template.CSS
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signatures: [safe.CSS INPUT]
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toc: true
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aliases: [/functions/safecss]
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---
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## Introduction
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{{% include "functions/_common/go-html-template-package.md" %}}
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## Usage
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Use the `safe.CSS` function to encapsulate known safe content that matches any of:
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1. The CSS3 stylesheet production, such as `p { color: purple }`.
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2. The CSS3 rule production, such as `a[href=~"https:"].foo#bar`.
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3. CSS3 declaration productions, such as `color: red; margin: 2px`.
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4. The CSS3 value production, such as `rgba(0, 0, 255, 127)`.
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Use of this type presents a security risk: the encapsulated content should come from a trusted source, as it will be included verbatim in the template output.
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See the [Go documentation] for details.
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[Go documentation]: https://pkg.go.dev/html/template#CSS
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## Example
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Without a safe declaration:
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```go-html-template
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{{ $style := "color: red;" }}
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<p style="{{ $style }}">foo</p>
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```
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Hugo renders the above to:
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```html
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<p style="ZgotmplZ">foo</p>
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```
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{{% note %}}
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`ZgotmplZ` is a special value that indicates that unsafe content reached a CSS or URL context at runtime.
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{{% /note %}}
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To declare the string as safe:
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```go-html-template
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{{ $style := "color: red;" }}
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<p style="{{ $style | safeCSS }}">foo</p>
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```
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Hugo renders the above to:
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```html
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<p style="color: red;">foo</p>
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```
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