slugify.ts

slugify(string) {
    let str = string.replace(/^\s+|\s+$/g, ''); // trim
    str = str.toLowerCase();

    // remove accents, swap ñ for n, etc
    const from = 'àáäâèéëêìíïîòóöôùúüûñç·/_,:;';
    const to   = 'aaaaeeeeiiiioooouuuunc------';

    
    for (let i=0, l=from.length ; i<l ; i++) {
      str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
    }
    str = str.replace(/[^a-z0-9 -]/g, '') // remove invalid chars
      .replace(/\s+/g, '-') // collapse whitespace and replace by -
      .replace(/-+/g, '-'); // collapse dashes
    return str;
 }