makeslug.js

/*
 *  Javascript makeslug()
 *    by J. Santos <jefrey[at]jefrey[dot]ml>
 */
 
/*
  Usage:
    string makeslug( string val [, string replaceBy = "-" ] )

  Example:
    makeslug("   This is a string fuLL of áccêntèd and InVaLid (?) cHaRs!!!   ");
  Will return:
    this-is-a-string-full-of-accented-and-invalid-chars
  
  And:
    makeslug("   This is a string fuLL of áccêntèd and InVaLid (?) cHaRs!!!   ", "_");
  Will return:
    this_is_a_string_full_of_accented_and_invalid_chars
*/


function makeslug(val, replaceBy) {
  replaceBy = replaceBy || '-';
  var mapaAcentosHex 	= { // by @marioluan and @lelotnk
  	a : /[\xE0-\xE6]/g,
  	A : /[\xC0-\xC6]/g,
  	e : /[\xE8-\xEB]/g, // if you're gonna echo this
  	E : /[\xC8-\xCB]/g, // JS code through PHP, do
  	i : /[\xEC-\xEF]/g, // not forget to escape these
  	I : /[\xCC-\xCF]/g, // backslashes (\), by repeating
  	o : /[\xF2-\xF6]/g, // them (\\)
  	O : /[\xD2-\xD6]/g,
  	u : /[\xF9-\xFC]/g,
  	U : /[\xD9-\xDC]/g,
  	c : /\xE7/g,
  	C : /\xC7/g,
  	n : /\xF1/g,
  	N : /\xD1/g,
  };
  
  for ( var letra in mapaAcentosHex ) {
  	var expressaoRegular = mapaAcentosHex[letra];
  	val = val.replace( expressaoRegular, letra );
  }
  
  val = val.toLowerCase();
  val = val.replace(/[^a-z0-9\-]/g, " ");
  
  do {
  	val = val.replace('  ', ' ');
  } while (val.indexOf('  ')>-1);
    
  val = val.trim();    
  val = val.replace(/\s/g, replaceBy);
  
  return val;
}