摘要：
(Sass::Script::Value::String) unit($number) Returns the unit(s) associated with a number. Complex units are sorted in alphabetical order by numerator 阅读全文
摘要：
(Sass::Script::Value::Bool) unitless($number) Returns whether a number has units. Examples: unitless(100) = true unitless(100px) = false Parameters: $ 阅读全文