sluggo/sluggo.js

High-speed, unicode-aware, browser-friendly slug generator

var _sluggoRanges;

var sluggo = function(s, options) {
  var n = '';
  var bad;
  // typecast other things to string carefully
  if ((s === undefined) || (s === null)) {
    s = '';
  }
  if (typeof(s) !== 'string') {
    if (s.toString) {
      s = s.toString();
    } else {
      s = '';
    }
  }
  if (!options) {
    options = {};
  }

  var separator = options.separator || '-';

  var i, j;

  // Track whether last character was also bad to
  // prevent duplicate dashes.
  //
  // Starting this out true prevents leading dashes
  var lastBad = true;

  var startOfMostRecentRun;

  for (i = 0; (i < s.length); i++) {
    var code = s.charCodeAt(i);
    bad = false;
    if ((options.allow !== undefined) && (options.allow.includes(s.charAt(i)))) {
      // Make an exception
    } else {
      // efficient binary search for a disallow character code
      var low = 0;
      var high = _sluggoRanges.length - 1;
      while (true) {
        j = (low + high) >> 1;
        if ((code >= _sluggoRanges[j][0]) && (code <= _sluggoRanges[j][1])) {
          bad = true;
          break;
        }
        if (j === low) {
          break;
        }
        if (code <= _sluggoRanges[j][0]) {
          high = j - 1;
        } else {
          low = j + 1;
        }
      }
    }
    if (bad) {
      if (!lastBad) {
        startOfMostRecentRun = n.length;
        n += separator;
      }
    } else {
      n += s.charAt(i).toLowerCase();
    }
    lastBad = bad;
  }
  // Remove trailing dashes
  if (lastBad) {
    n = n.substr(0, startOfMostRecentRun);
  }
  if (!n.length) {
    // No slug at all is usually bad news for Express wildcard routes, etc.
    n = (options.def == null) ? 'none' : options.def;
  }
  return n;
};

if (typeof module !== 'undefined' && module.exports) {
  // node.js
  module.exports = sluggo;
} else {
  // web browser
  window.sluggo = sluggo;
}

_sluggoRanges = [[0,47],[58,64],[91,96],[123,169],[171,177],[180,180],[182,184],[187,187],[191,191],[215,215],[247,247],[706,709],[722,735],[741,747],[749,749],[751,879],[885,885],[888,889],[894,894],[896,901],[903,903],[907,907],[909,909],[930,930],[1014,1014],[1154,1161],[1328,1328],[1367,1368],[1370,1376],[1416,1487],[1515,1519],[1523,1567],[1611,1631],[1642,1645],[1648,1648],[1748,1748],[1750,1764],[1767,1773],[1789,1790],[1792,1807],[1809,1809],[1840,1868],[1958,1968],[1970,1983],[2027,2035],[2038,2041],[2043,2047],[2070,2073],[2075,2083],[2085,2087],[2089,2111],[2137,2207],[2227,2307],[2362,2364],[2366,2383],[2385,2391],[2402,2405],[2416,2416],[2433,2436],[2445,2446],[2449,2450],[2473,2473],[2481,2481],[2483,2485],[2490,2492],[2494,2509],[2511,2523],[2526,2526],[2530,2533],[2546,2547],[2554,2564],[2571,2574],[2577,2578],[2601,2601],[2609,2609],[2612,2612],[2615,2615],[2618,2648],[2653,2653],[2655,2661],[2672,2673],[2677,2692],[2702,2702],[2706,2706],[2729,2729],[2737,2737],[2740,2740],[2746,2748],[2750,2767],[2769,2783],[2786,2789],[2800,2820],[2829,2830],[2833,2834],[2857,2857],[2865,2865],[2868,2868],[2874,2876],[2878,2907],[2910,2910],[2914,2917],[2928,2928],[2936,2946],[2948,2948],[2955,2957],[2961,2961],[2966,2968],[2971,2971],[2973,2973],[2976,2978],[2981,2983],[2987,2989],[3002,3023],[3025,3045],[3059,3076],[3085,3085],[3089,3089],[3113,3113],[3130,3132],[3134,3159],[3162,3167],[3170,3173],[3184,3191],[3199,3204],[3213,3213],[3217,3217],[3241,3241],[3252,3252],[3258,3260],[3262,3293],[3295,3295],[3298,3301],[3312,3312],[3315,3332],[3341,3341],[3345,3345],[3387,3388],[3390,3405],[3407,3423],[3426,3429],[3446,3449],[3456,3460],[3479,3481],[3506,3506],[3516,3516],[3518,3519],[3527,3557],[3568,3584],[3633,3633],[3636,3647],[3655,3663],[3674,3712],[3715,3715],[3717,3718],[3721,3721],[3723,3724],[3726,3731],[3736,3736],[3744,3744],[3748,3748],[3750,3750],[3752,3753],[3756,3756],[3761,3761],[3764,3772],[3774,3775],[3781,3781],[3783,3791],[3802,3803],[3808,3839],[3841,3871],[3892,3903],[3912,3912],[3949,3975],[3981,4095],[4139,4158],[4170,4175],[4182,4185],[4190,4192],[4194,4196],[4199,4205],[4209,4212],[4226,4237],[4239,4239],[4250,4255],[4294,4294],[4296,4300],[4302,4303],[4347,4347],[4681,4681],[4686,4687],[4695,4695],[4697,4697],[4702,4703],[4745,4745],[4750,4751],[4785,4785],[4790,4791],[4799,4799],[4801,4801],[4806,4807],[4823,4823],[4881,4881],[4886,4887],[4955,4968],[4989,4991],[5008,5023],[5109,5120],[5741,5742],[5760,5760],[5787,5791],[5867,5869],[5881,5887],[5901,5901],[5906,5919],[5938,5951],[5970,5983],[5997,5997],[6001,6015],[6068,6102],[6104,6107],[6109,6111],[6122,6127],[6138,6159],[6170,6175],[6264,6271],[6313,6313],[6315,6319],[6390,6399],[6431,6469],[6510,6511],[6517,6527],[6572,6592],[6600,6607],[6619,6655],[6679,6687],[6741,6783],[6794,6799],[6810,6822],[6824,6916],[6964,6980],[6988,6991],[7002,7042],[7073,7085],[7142,7167],[7204,7231],[7242,7244],[7294,7400],[7405,7405],[7410,7412],[7415,7423],[7616,7679],[7958,7959],[7966,7967],[8006,8007],[8014,8015],[8024,8024],[8026,8026],[8028,8028],[8030,8030],[8062,8063],[8117,8117],[8125,8125],[8127,8129],[8133,8133],[8141,8143],[8148,8149],[8156,8159],[8173,8177],[8181,8181],[8189,8303],[8306,8307],[8314,8318],[8330,8335],[8349,8449],[8451,8454],[8456,8457],[8468,8468],[8470,8472],[8478,8483],[8485,8485],[8487,8487],[8489,8489],[8494,8494],[8506,8507],[8512,8516],[8522,8525],[8527,8527],[8586,9311],[9372,9449],[9472,10101],[10132,11263],[11311,11311],[11359,11359],[11493,11498],[11503,11505],[11508,11516],[11518,11519],[11558,11558],[11560,11564],[11566,11567],[11624,11630],[11632,11647],[11671,11679],[11687,11687],[11695,11695],[11703,11703],[11711,11711],[11719,11719],[11727,11727],[11735,11735],[11743,11822],[11824,12292],[12296,12320],[12330,12336],[12342,12343],[12349,12352],[12439,12444],[12448,12448],[12539,12539],[12544,12548],[12590,12592],[12687,12689],[12694,12703],[12731,12783],[12800,12831],[12842,12871],[12880,12880],[12896,12927],[12938,12976],[12992,13311],[19894,19967],[40909,40959],[42125,42191],[42238,42239],[42509,42511],[42540,42559],[42607,42622],[42654,42655],[42736,42774],[42784,42785],[42889,42890],[42895,42895],[42926,42927],[42930,42998],[43010,43010],[43014,43014],[43019,43019],[43043,43055],[43062,43071],[43124,43137],[43188,43215],[43226,43249],[43256,43258],[43260,43263],[43302,43311],[43335,43359],[43389,43395],[43443,43470],[43482,43487],[43493,43493],[43519,43519],[43561,43583],[43587,43587],[43596,43599],[43610,43615],[43639,43641],[43643,43645],[43696,43696],[43698,43700],[43703,43704],[43710,43711],[43713,43713],[43715,43738],[43742,43743],[43755,43761],[43765,43776],[43783,43784],[43791,43792],[43799,43807],[43815,43815],[43823,43823],[43867,43867],[43872,43875],[43878,43967],[44003,44015],[44026,44031],[55204,55215],[55239,55242],[55292,63743],[64110,64111],[64218,64255],[64263,64274],[64280,64284],[64286,64286],[64297,64297],[64311,64311],[64317,64317],[64319,64319],[64322,64322],[64325,64325],[64434,64466],[64830,64847],[64912,64913],[64968,65007],[65020,65135],[65141,65141],[65277,65295],[65306,65312],[65339,65344],[65371,65381],[65471,65473],[65480,65481],[65488,65489],[65496,65497],[65501,65535],[65548,65548],[65575,65575],[65595,65595],[65598,65598],[65614,65615],[65630,65663],[65787,65798],[65844,65855],[65913,65929],[65932,66175],[66205,66207],[66257,66272],[66300,66303],[66340,66351],[66379,66383],[66422,66431],[66462,66463],[66500,66503],[66512,66512],[66518,66559],[66718,66719],[66730,66815],[66856,66863],[66916,67071],[67383,67391],[67414,67423],[67432,67583],[67590,67591],[67593,67593],[67638,67638],[67641,67643],[67645,67646],[67670,67671],[67703,67704],[67743,67750],[67760,67839],[67868,67871],[67898,67967],[68024,68029],[68032,68095],[68097,68111],[68116,68116],[68120,68120],[68148,68159],[68168,68191],[68223,68223],[68256,68287],[68296,68296],[68325,68330],[68336,68351],[68406,68415],[68438,68439],[68467,68471],[68498,68520],[68528,68607],[68681,69215],[69247,69634],[69688,69713],[69744,69762],[69808,69839],[69865,69871],[69882,69890],[69927,69941],[69952,69967],[70003,70005],[70007,70018],[70067,70080],[70085,70095],[70107,70112],[70133,70143],[70162,70162],[70188,70319],[70367,70383],[70394,70404],[70413,70414],[70417,70418],[70441,70441],[70449,70449],[70452,70452],[70458,70460],[70462,70492],[70498,70783],[70832,70851],[70854,70854],[70856,70863],[70874,71039],[71087,71167],[71216,71235],[71237,71247],[71258,71295],[71339,71359],[71370,71839],[71923,71934],[71936,72383],[72441,73727],[74649,74751],[74863,77823],[78895,92159],[92729,92735],[92767,92767],[92778,92879],[92910,92927],[92976,92991],[92996,93007],[93018,93018],[93026,93026],[93048,93052],[93072,93951],[94021,94031],[94033,94098],[94112,110591],[110594,113663],[113771,113775],[113789,113791],[113801,113807],[113818,119647],[119666,119807],[119893,119893],[119965,119965],[119968,119969],[119971,119972],[119975,119976],[119981,119981],[119994,119994],[119996,119996],[120004,120004],[120070,120070],[120075,120076],[120085,120085],[120093,120093],[120122,120122],[120127,120127],[120133,120133],[120135,120137],[120145,120145],[120486,120487],[120513,120513],[120539,120539],[120571,120571],[120597,120597],[120629,120629],[120655,120655],[120687,120687],[120713,120713],[120745,120745],[120771,120771],[120780,120781],[120832,124927],[125125,125126],[125136,126463],[126468,126468],[126496,126496],[126499,126499],[126501,126502],[126504,126504],[126515,126515],[126520,126520],[126522,126522],[126524,126529],[126531,126534],[126536,126536],[126538,126538],[126540,126540],[126544,126544],[126547,126547],[126549,126550],[126552,126552],[126554,126554],[126556,126556],[126558,126558],[126560,126560],[126563,126563],[126565,126566],[126571,126571],[126579,126579],[126584,126584],[126589,126589],[126591,126591],[126602,126602],[126620,126624],[126628,126628],[126634,126634],[126652,127231],[127245,131071],[173783,173823],[177973,177983],[178206,194559],[195102,1114112]];