@use 'sass:meta';
@use 'sass:list';
@use 'sass:math';

/// Checks if a value is a frequency.
///
/// @param {*} $value - A value to be checked.
///
/// @return {Bool} True if $value is a frequency, false if it is not.
///
/// @access public
/// @group Utilities
@function is-frequency($value) {
  @return (
    meta.type-of($value) == 'number' and
      list.index('Hz' 'kHz', math.unit($value)) != null
  );
}