String para Slug Snippet

Snippet interessante para analisar uma string em um valor pronto para slug

function string_to_slug(str) {
  str = str.replace(/^s+|s+$/g, ''); // trim
  str = str.toLowerCase();

  // remove accents, swap ñ for n, etc
  var from = "àáãäâèéëêìíïîòõóöôùúüûñç·/_,:;";
  var to   = "aaaaaeeeeiiiiooooouuuunc------";
  for (var 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;
}

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