@use "sass:math";

/// Convert px to rem or em.
/// @param  {Number} $px Value in px
/// @param  {String} $to Unit. Either "rem" or "em"
/// @param  {Number} $standard 1rem (or 1em) = 16px
/// @return {Number} Value in rem or em
@function convert-px($px, $to: "rem", $standard: 16) {
  @if $to == "rem" {
    @return math.div($px, $standard) + 0rem; // stylelint-disable-line
  } @else if $to == "em" {
    @return math.div($px, $standard) + 0em; // stylelint-disable-line
  } @else {
    @error "`$to` must be either `rem` or `em`.";
  }
}