# stylus/property-no-unknown
disallow unknown properties.
- ⚙️ This rule is included in 
"stylelint-plugin-stylus/recommended"and"stylelint-plugin-stylus/standard". (options:true) 
# 📖 Rule Details
This rule reports unknown properties.
# ❓ Why Not Use stylelint Rule
 The property-no-unknown (opens new window) rule incorrectly report errors in Stylus.
This problem is that the core rules do not understand that variables and interpolations of the Stylus.
The stylus/property-no-unknown rule understands that variables and interpolations of the Stylus.
# 🔧 Options
See stylelint - property-no-unknown - Options (opens new window).