vanilla javascript method to slugify a string

slugify.js

function slugify(input) {
    if (!input)
        return '';

    // make lower case and trim
    var slug = input.toLowerCase().trim();

    // remove accents from charaters
    slug = slug.normalize('NFD').replace(/[\u0300-\u036f]/g, '')

    // replace invalid chars with spaces
    slug = slug.replace(/[^a-z0-9\s-]/g, ' ').trim();

    // replace multiple spaces or hyphens with a single hyphen
    slug = slug.replace(/[\s-]+/g, '-');

    return slug;
}