function slugify(string) {
    const a = 'àáâäæãåāăąçćčđďèéêëēėęěğǵḧıîïíīįìłḿñńǹňôöòóœøōõőṕŕřßśšşșťțûüùúūǘůűųẃẍÿýžźż·/_,:;';
    const b = 'aaaaaaaaaacccddeeeeeeeegghiiiiiiilmnnnnoooooooooprrsssssttuuuuuuuuuwxyyzzz------';
    const p = new RegExp(a.split('').join('|'), 'g');

    return string.toString().toLowerCase()
    .replace(/\s+/g, '-')
    .replace(p, c => b.charAt(a.indexOf(c)))
    .replace(/&/g, '-and-')
    .replace(/[^\w\-]+/g, '')
    .replace(/\-\-+/g, '-')
    .replace(/^-+/, '')
    .replace(/-+$/, '')
}