How to set option shortcut in gulp-slim?

Question

gulp.js

Hello. Do not tell me how to set up your shortcuts when compiling from slim to html. For example I want to add:

Slim::Engine.set_options shortcut: {
  '#' => {attr: 'id'},
  '.' => {attr: 'class'},
  '&' => {tag: 'input', attr: 'type'},
  '@' => {attr: 'role'},
  '^' => {attr: %w(data-role role)}
}

The official documents say that you need to insert this code into "config/initializers/slim.rb", but what about when compilation is not in a Rails project? Thank you.