# stylus/at-rule-no-unknown

disallow unknown at-rules.

• ⚙️ This rule is included in "stylelint-plugin-stylus/recommended" and "stylelint-plugin-stylus/standard". (options: true)

# 📖 Rule Details

This rule reports other than at-rules defined in the CSS specification and at-rules available in the Stylus standard.

# ❓ Why Not Use stylelint Rule

The at-rule-no-unknown (opens new window) rule incorrectly report errors in Stylus.
This problem is that the core rules do not understand at-rules of the Stylus.
The stylus/at-rule-no-unknown rule understands at-rules of the Stylus.

# 🔧 Options

See stylelint - at-rule-no-unknown - Options (opens new window).

# true

# 👫 Related rules

• at-rule-no-unknown (opens new window)

# 🔍 Implementation

• Rule source (opens new window)
• Test source (opens new window)