//can be used as ArrayFunction in google sheets + appscript
function slugify(input) {
  if (input.map) {            // Test whether input is an array.
    return input.map(slugify); // Recurse over array if so.
  } else {
    let slug = '';
    slug = input.toLowerCase();
    slug = slug.replace(/[^\w\s-]/g, '');
    slug = slug.replace(/\s+/g, '-');
    return slug;
  }
}