scss--函數 (Functions)--unitless

• (Sass::Script::Value::Bool) unitless($number)

Returns whether a number has units.

Examples:

unitless(100) => true
unitless(100px) => false

Parameters:
$number (Sass::Script::Value::Number)

Returns:
(Sass::Script::Value::Bool)

Raises:
(ArgumentError) — if $number isn't a number

該scss 函數接受一個scssscript 變量，用於判斷接收的值是否帶有單位，若是是則返回false,不然返回true.