String replace function for SASS

_str-replace.scss

/// Replace `$search` with `$replace` in `$string`
/// @author Hugo Giraudel
/// @param {String} $string - Initial string
/// @param {String} $search - Substring to replace
/// @param {String} $replace ('') - New value
/// @return {String} - Updated string
@function str-replace($string, $search, $replace: '') {
  $index: str_index($string, $search);

  @if $index {
    @return str_slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
  }

  @return $string;
}

Very nice, seems to be working with recent sass if deprecations:
https://sass-lang.com/documentation/breaking-changes/if-function/