Efficiently replace all accented characters in a string?

Question

Here is a more complete version based on the Unicode standard.

var Latinise={};Latinise.latin_map={"Á":"A",
"Ă":"A",
"Ắ":"A",
"Ặ":"A",
"Ằ":"A",
"Ẳ":"A",
"Ẵ":"A",
"Ǎ":"A",
"Â":"A",
"Ấ":"A",
"Ậ":"A",
"Ầ":"A",
"Ẩ":"A",
"Ẫ":"A",
"Ä":"A",
"Ǟ":"A",
"Ȧ":"A",
"Ǡ":"A",
"Ạ":"A",
"Ȁ":"A",
"À":"A",
"Ả":"A",
"Ȃ":"A",
"Ā":"A",
"Ą":"A",
"Å":"A",
"Ǻ":"A",
"Ḁ":"A",
"Ⱥ":"A",
"Ã":"A",
"Ꜳ":"AA",
"Æ":"AE",
"Ǽ":"AE",
"Ǣ":"AE",
"Ꜵ":"AO",
"Ꜷ":"AU",
"Ꜹ":"AV",
"Ꜻ":"AV",
"Ꜽ":"AY",
"Ḃ":"B",
"Ḅ":"B",
"Ɓ":"B",
"Ḇ":"B",
"Ƀ":"B",
"Ƃ":"B",
"Ć":"C",
"Č":"C",
"Ç":"C",
"Ḉ":"C",
"Ĉ":"C",
"Ċ":"C",
"Ƈ":"C",
"Ȼ":"C",
"Ď":"D",
"Ḑ":"D",
"Ḓ":"D",
"Ḋ":"D",
"Ḍ":"D",
"Ɗ":"D",
"Ḏ":"D",
"Dz":"D",
"Dž":"D",
"Đ":"D",
"Ƌ":"D",
"DZ":"DZ",
"DŽ":"DZ",
"É":"E",
"Ĕ":"E",
"Ě":"E",
"Ȩ":"E",
"Ḝ":"E",
"Ê":"E",
"Ế":"E",
"Ệ":"E",
"Ề":"E",
"Ể":"E",
"Ễ":"E",
"Ḙ":"E",
"Ë":"E",
"Ė":"E",
"Ẹ":"E",
"Ȅ":"E",
"È":"E",
"Ẻ":"E",
"Ȇ":"E",
"Ē":"E",
"Ḗ":"E",
"Ḕ":"E",
"Ę":"E",
"Ɇ":"E",
"Ẽ":"E",
"Ḛ":"E",
"Ꝫ":"ET",
"Ḟ":"F",
"Ƒ":"F",
"Ǵ":"G",
"Ğ":"G",
"Ǧ":"G",
"Ģ":"G",
"Ĝ":"G",
"Ġ":"G",
"Ɠ":"G",
"Ḡ":"G",
"Ǥ":"G",
"Ḫ":"H",
"Ȟ":"H",
"Ḩ":"H",
"Ĥ":"H",
"Ⱨ":"H",
"Ḧ":"H",
"Ḣ":"H",
"Ḥ":"H",
"Ħ":"H",
"Í":"I",
"Ĭ":"I",
"Ǐ":"I",
"Î":"I",
"Ï":"I",
"Ḯ":"I",
"İ":"I",
"Ị":"I",
"Ȉ":"I",
"Ì":"I",
"Ỉ":"I",
"Ȋ":"I",
"Ī":"I",
"Į":"I",
"Ɨ":"I",
"Ĩ":"I",
"Ḭ":"I",
"Ꝺ":"D",
"Ꝼ":"F",
"Ᵹ":"G",
"Ꞃ":"R",
"Ꞅ":"S",
"Ꞇ":"T",
"Ꝭ":"IS",
"Ĵ":"J",
"Ɉ":"J",
"Ḱ":"K",
"Ǩ":"K",
"Ķ":"K",
"Ⱪ":"K",
"Ꝃ":"K",
"Ḳ":"K",
"Ƙ":"K",
"Ḵ":"K",
"Ꝁ":"K",
"Ꝅ":"K",
"Ĺ":"L",
"Ƚ":"L",
"Ľ":"L",
"Ļ":"L",
"Ḽ":"L",
"Ḷ":"L",
"Ḹ":"L",
"Ⱡ":"L",
"Ꝉ":"L",
"Ḻ":"L",
"Ŀ":"L",
"Ɫ":"L",
"Lj":"L",
"Ł":"L",
"LJ":"LJ",
"Ḿ":"M",
"Ṁ":"M",
"Ṃ":"M",
"Ɱ":"M",
"Ń":"N",
"Ň":"N",
"Ņ":"N",
"Ṋ":"N",
"Ṅ":"N",
"Ṇ":"N",
"Ǹ":"N",
"Ɲ":"N",
"Ṉ":"N",
"Ƞ":"N",
"Nj":"N",
"Ñ":"N",
"NJ":"NJ",
"Ó":"O",
"Ŏ":"O",
"Ǒ":"O",
"Ô":"O",
"Ố":"O",
"Ộ":"O",
"Ồ":"O",
"Ổ":"O",
"Ỗ":"O",
"Ö":"O",
"Ȫ":"O",
"Ȯ":"O",
"Ȱ":"O",
"Ọ":"O",
"Ő":"O",
"Ȍ":"O",
"Ò":"O",
"Ỏ":"O",
"Ơ":"O",
"Ớ":"O",
"Ợ":"O",
"Ờ":"O",
"Ở":"O",
"Ỡ":"O",
"Ȏ":"O",
"Ꝋ":"O",
"Ꝍ":"O",
"Ō":"O",
"Ṓ":"O",
"Ṑ":"O",
"Ɵ":"O",
"Ǫ":"O",
"Ǭ":"O",
"Ø":"O",
"Ǿ":"O",
"Õ":"O",
"Ṍ":"O",
"Ṏ":"O",
"Ȭ":"O",
"Ƣ":"OI",
"Ꝏ":"OO",
"Ɛ":"E",
"Ɔ":"O",
"Ȣ":"OU",
"Ṕ":"P",
"Ṗ":"P",
"Ꝓ":"P",
"Ƥ":"P",
"Ꝕ":"P",
"Ᵽ":"P",
"Ꝑ":"P",
"Ꝙ":"Q",
"Ꝗ":"Q",
"Ŕ":"R",
"Ř":"R",
"Ŗ":"R",
"Ṙ":"R",
"Ṛ":"R",
"Ṝ":"R",
"Ȑ":"R",
"Ȓ":"R",
"Ṟ":"R",
"Ɍ":"R",
"Ɽ":"R",
"Ꜿ":"C",
"Ǝ":"E",
"Ś":"S",
"Ṥ":"S",
"Š":"S",
"Ṧ":"S",
"Ş":"S",
"Ŝ":"S",
"Ș":"S",
"Ṡ":"S",
"Ṣ":"S",
"Ṩ":"S",
"Ť":"T",
"Ţ":"T",
"Ṱ":"T",
"Ț":"T",
"Ⱦ":"T",
"Ṫ":"T",
"Ṭ":"T",
"Ƭ":"T",
"Ṯ":"T",
"Ʈ":"T",
"Ŧ":"T",
"Ɐ":"A",
"Ꞁ":"L",
"Ɯ":"M",
"Ʌ":"V",
"Ꜩ":"TZ",
"Ú":"U",
"Ŭ":"U",
"Ǔ":"U",
"Û":"U",
"Ṷ":"U",
"Ü":"U",
"Ǘ":"U",
"Ǚ":"U",
"Ǜ":"U",
"Ǖ":"U",
"Ṳ":"U",
"Ụ":"U",
"Ű":"U",
"Ȕ":"U",
"Ù":"U",
"Ủ":"U",
"Ư":"U",
"Ứ":"U",
"Ự":"U",
"Ừ":"U",
"Ử":"U",
"Ữ":"U",
"Ȗ":"U",
"Ū":"U",
"Ṻ":"U",
"Ų":"U",
"Ů":"U",
"Ũ":"U",
"Ṹ":"U",
"Ṵ":"U",
"Ꝟ":"V",
"Ṿ":"V",
"Ʋ":"V",
"Ṽ":"V",
"Ꝡ":"VY",
"Ẃ":"W",
"Ŵ":"W",
"Ẅ":"W",
"Ẇ":"W",
"Ẉ":"W",
"Ẁ":"W",
"Ⱳ":"W",
"Ẍ":"X",
"Ẋ":"X",
"Ý":"Y",
"Ŷ":"Y",
"Ÿ":"Y",
"Ẏ":"Y",
"Ỵ":"Y",
"Ỳ":"Y",
"Ƴ":"Y",
"Ỷ":"Y",
"Ỿ":"Y",
"Ȳ":"Y",
"Ɏ":"Y",
"Ỹ":"Y",
"Ź":"Z",
"Ž":"Z",
"Ẑ":"Z",
"Ⱬ":"Z",
"Ż":"Z",
"Ẓ":"Z",
"Ȥ":"Z",
"Ẕ":"Z",
"Ƶ":"Z",
"IJ":"IJ",
"Œ":"OE",
"ᴀ":"A",
"ᴁ":"AE",
"ʙ":"B",
"ᴃ":"B",
"ᴄ":"C",
"ᴅ":"D",
"ᴇ":"E",
"ꜰ":"F",
"ɢ":"G",
"ʛ":"G",
"ʜ":"H",
"ɪ":"I",
"ʁ":"R",
"ᴊ":"J",
"ᴋ":"K",
"ʟ":"L",
"ᴌ":"L",
"ᴍ":"M",
"ɴ":"N",
"ᴏ":"O",
"ɶ":"OE",
"ᴐ":"O",
"ᴕ":"OU",
"ᴘ":"P",
"ʀ":"R",
"ᴎ":"N",
"ᴙ":"R",
"ꜱ":"S",
"ᴛ":"T",
"ⱻ":"E",
"ᴚ":"R",
"ᴜ":"U",
"ᴠ":"V",
"ᴡ":"W",
"ʏ":"Y",
"ᴢ":"Z",
"á":"a",
"ă":"a",
"ắ":"a",
"ặ":"a",
"ằ":"a",
"ẳ":"a",
"ẵ":"a",
"ǎ":"a",
"â":"a",
"ấ":"a",
"ậ":"a",
"ầ":"a",
"ẩ":"a",
"ẫ":"a",
"ä":"a",
"ǟ":"a",
"ȧ":"a",
"ǡ":"a",
"ạ":"a",
"ȁ":"a",
"à":"a",
"ả":"a",
"ȃ":"a",
"ā":"a",
"ą":"a",
"ᶏ":"a",
"ẚ":"a",
"å":"a",
"ǻ":"a",
"ḁ":"a",
"ⱥ":"a",
"ã":"a",
"ꜳ":"aa",
"æ":"ae",
"ǽ":"ae",
"ǣ":"ae",
"ꜵ":"ao",
"ꜷ":"au",
"ꜹ":"av",
"ꜻ":"av",
"ꜽ":"ay",
"ḃ":"b",
"ḅ":"b",
"ɓ":"b",
"ḇ":"b",
"ᵬ":"b",
"ᶀ":"b",
"ƀ":"b",
"ƃ":"b",
"ɵ":"o",
"ć":"c",
"č":"c",
"ç":"c",
"ḉ":"c",
"ĉ":"c",
"ɕ":"c",
"ċ":"c",
"ƈ":"c",
"ȼ":"c",
"ď":"d",
"ḑ":"d",
"ḓ":"d",
"ȡ":"d",
"ḋ":"d",
"ḍ":"d",
"ɗ":"d",
"ᶑ":"d",
"ḏ":"d",
"ᵭ":"d",
"ᶁ":"d",
"đ":"d",
"ɖ":"d",
"ƌ":"d",
"ı":"i",
"ȷ":"j",
"ɟ":"j",
"ʄ":"j",
"dz":"dz",
"dž":"dz",
"é":"e",
"ĕ":"e",
"ě":"e",
"ȩ":"e",
"ḝ":"e",
"ê":"e",
"ế":"e",
"ệ":"e",
"ề":"e",
"ể":"e",
"ễ":"e",
"ḙ":"e",
"ë":"e",
"ė":"e",
"ẹ":"e",
"ȅ":"e",
"è":"e",
"ẻ":"e",
"ȇ":"e",
"ē":"e",
"ḗ":"e",
"ḕ":"e",
"ⱸ":"e",
"ę":"e",
"ᶒ":"e",
"ɇ":"e",
"ẽ":"e",
"ḛ":"e",
"ꝫ":"et",
"ḟ":"f",
"ƒ":"f",
"ᵮ":"f",
"ᶂ":"f",
"ǵ":"g",
"ğ":"g",
"ǧ":"g",
"ģ":"g",
"ĝ":"g",
"ġ":"g",
"ɠ":"g",
"ḡ":"g",
"ᶃ":"g",
"ǥ":"g",
"ḫ":"h",
"ȟ":"h",
"ḩ":"h",
"ĥ":"h",
"ⱨ":"h",
"ḧ":"h",
"ḣ":"h",
"ḥ":"h",
"ɦ":"h",
"ẖ":"h",
"ħ":"h",
"ƕ":"hv",
"í":"i",
"ĭ":"i",
"ǐ":"i",
"î":"i",
"ï":"i",
"ḯ":"i",
"ị":"i",
"ȉ":"i",
"ì":"i",
"ỉ":"i",
"ȋ":"i",
"ī":"i",
"į":"i",
"ᶖ":"i",
"ɨ":"i",
"ĩ":"i",
"ḭ":"i",
"ꝺ":"d",
"ꝼ":"f",
"ᵹ":"g",
"ꞃ":"r",
"ꞅ":"s",
"ꞇ":"t",
"ꝭ":"is",
"ǰ":"j",
"ĵ":"j",
"ʝ":"j",
"ɉ":"j",
"ḱ":"k",
"ǩ":"k",
"ķ":"k",
"ⱪ":"k",
"ꝃ":"k",
"ḳ":"k",
"ƙ":"k",
"ḵ":"k",
"ᶄ":"k",
"ꝁ":"k",
"ꝅ":"k",
"ĺ":"l",
"ƚ":"l",
"ɬ":"l",
"ľ":"l",
"ļ":"l",
"ḽ":"l",
"ȴ":"l",
"ḷ":"l",
"ḹ":"l",
"ⱡ":"l",
"ꝉ":"l",
"ḻ":"l",
"ŀ":"l",
"ɫ":"l",
"ᶅ":"l",
"ɭ":"l",
"ł":"l",
"lj":"lj",
"ſ":"s",
"ẜ":"s",
"ẛ":"s",
"ẝ":"s",
"ḿ":"m",
"ṁ":"m",
"ṃ":"m",
"ɱ":"m",
"ᵯ":"m",
"ᶆ":"m",
"ń":"n",
"ň":"n",
"ņ":"n",
"ṋ":"n",
"ȵ":"n",
"ṅ":"n",
"ṇ":"n",
"ǹ":"n",
"ɲ":"n",
"ṉ":"n",
"ƞ":"n",
"ᵰ":"n",
"ᶇ":"n",
"ɳ":"n",
"ñ":"n",
"nj":"nj",
"ó":"o",
"ŏ":"o",
"ǒ":"o",
"ô":"o",
"ố":"o",
"ộ":"o",
"ồ":"o",
"ổ":"o",
"ỗ":"o",
"ö":"o",
"ȫ":"o",
"ȯ":"o",
"ȱ":"o",
"ọ":"o",
"ő":"o",
"ȍ":"o",
"ò":"o",
"ỏ":"o",
"ơ":"o",
"ớ":"o",
"ợ":"o",
"ờ":"o",
"ở":"o",
"ỡ":"o",
"ȏ":"o",
"ꝋ":"o",
"ꝍ":"o",
"ⱺ":"o",
"ō":"o",
"ṓ":"o",
"ṑ":"o",
"ǫ":"o",
"ǭ":"o",
"ø":"o",
"ǿ":"o",
"õ":"o",
"ṍ":"o",
"ṏ":"o",
"ȭ":"o",
"ƣ":"oi",
"ꝏ":"oo",
"ɛ":"e",
"ᶓ":"e",
"ɔ":"o",
"ᶗ":"o",
"ȣ":"ou",
"ṕ":"p",
"ṗ":"p",
"ꝓ":"p",
"ƥ":"p",
"ᵱ":"p",
"ᶈ":"p",
"ꝕ":"p",
"ᵽ":"p",
"ꝑ":"p",
"ꝙ":"q",
"ʠ":"q",
"ɋ":"q",
"ꝗ":"q",
"ŕ":"r",
"ř":"r",
"ŗ":"r",
"ṙ":"r",
"ṛ":"r",
"ṝ":"r",
"ȑ":"r",
"ɾ":"r",
"ᵳ":"r",
"ȓ":"r",
"ṟ":"r",
"ɼ":"r",
"ᵲ":"r",
"ᶉ":"r",
"ɍ":"r",
"ɽ":"r",
"ↄ":"c",
"ꜿ":"c",
"ɘ":"e",
"ɿ":"r",
"ś":"s",
"ṥ":"s",
"š":"s",
"ṧ":"s",
"ş":"s",
"ŝ":"s",
"ș":"s",
"ṡ":"s",
"ṣ":"s",
"ṩ":"s",
"ʂ":"s",
"ᵴ":"s",
"ᶊ":"s",
"ȿ":"s",
"ɡ":"g",
"ᴑ":"o",
"ᴓ":"o",
"ᴝ":"u",
"ť":"t",
"ţ":"t",
"ṱ":"t",
"ț":"t",
"ȶ":"t",
"ẗ":"t",
"ⱦ":"t",
"ṫ":"t",
"ṭ":"t",
"ƭ":"t",
"ṯ":"t",
"ᵵ":"t",
"ƫ":"t",
"ʈ":"t",
"ŧ":"t",
"ᵺ":"th",
"ɐ":"a",
"ᴂ":"ae",
"ǝ":"e",
"ᵷ":"g",
"ɥ":"h",
"ʮ":"h",
"ʯ":"h",
"ᴉ":"i",
"ʞ":"k",
"ꞁ":"l",
"ɯ":"m",
"ɰ":"m",
"ᴔ":"oe",
"ɹ":"r",
"ɻ":"r",
"ɺ":"r",
"ⱹ":"r",
"ʇ":"t",
"ʌ":"v",
"ʍ":"w",
"ʎ":"y",
"ꜩ":"tz",
"ú":"u",
"ŭ":"u",
"ǔ":"u",
"û":"u",
"ṷ":"u",
"ü":"u",
"ǘ":"u",
"ǚ":"u",
"ǜ":"u",
"ǖ":"u",
"ṳ":"u",
"ụ":"u",
"ű":"u",
"ȕ":"u",
"ù":"u",
"ủ":"u",
"ư":"u",
"ứ":"u",
"ự":"u",
"ừ":"u",
"ử":"u",
"ữ":"u",
"ȗ":"u",
"ū":"u",
"ṻ":"u",
"ų":"u",
"ᶙ":"u",
"ů":"u",
"ũ":"u",
"ṹ":"u",
"ṵ":"u",
"ᵫ":"ue",
"ꝸ":"um",
"ⱴ":"v",
"ꝟ":"v",
"ṿ":"v",
"ʋ":"v",
"ᶌ":"v",
"ⱱ":"v",
"ṽ":"v",
"ꝡ":"vy",
"ẃ":"w",
"ŵ":"w",
"ẅ":"w",
"ẇ":"w",
"ẉ":"w",
"ẁ":"w",
"ⱳ":"w",
"ẘ":"w",
"ẍ":"x",
"ẋ":"x",
"ᶍ":"x",
"ý":"y",
"ŷ":"y",
"ÿ":"y",
"ẏ":"y",
"ỵ":"y",
"ỳ":"y",
"ƴ":"y",
"ỷ":"y",
"ỿ":"y",
"ȳ":"y",
"ẙ":"y",
"ɏ":"y",
"ỹ":"y",
"ź":"z",
"ž":"z",
"ẑ":"z",
"ʑ":"z",
"ⱬ":"z",
"ż":"z",
"ẓ":"z",
"ȥ":"z",
"ẕ":"z",
"ᵶ":"z",
"ᶎ":"z",
"ʐ":"z",
"ƶ":"z",
"ɀ":"z",
"ff":"ff",
"ffi":"ffi",
"ffl":"ffl",
"fi":"fi",
"fl":"fl",
"ij":"ij",
"œ":"oe",
"st":"st",
"ₐ":"a",
"ₑ":"e",
"ᵢ":"i",
"ⱼ":"j",
"ₒ":"o",
"ᵣ":"r",
"ᵤ":"u",
"ᵥ":"v",
"ₓ":"x"};
String.prototype.latinise=function(){return this.replace(/[^A-Za-z0-9\[\] ]/g,function(a){return Latinise.latin_map[a]||a})};
String.prototype.latinize=String.prototype.latinise;
String.prototype.isLatin=function(){return this==this.latinise()}

Some examples:

> "Piqué".latinize();
"Pique"
> "Piqué".isLatin();
false
> "Pique".isLatin();
true
> "Piqué".latinise().isLatin();
true

I can't speak to what you are trying to do specifically with the function itself, but if you don't like the regex being built every time, here are two solutions and some caveats about each.

Here is one way to do this:

function makeSortString(s) {
  if(!makeSortString.translate_re) makeSortString.translate_re = /[öäüÖÄÜ]/g;
  var translate = {
    "ä": "a", "ö": "o", "ü": "u",
    "Ä": "A", "Ö": "O", "Ü": "U"   // probably more to come
  };
  return ( s.replace(makeSortString.translate_re, function(match) { 
    return translate[match]; 
  }) );
}

This will obviously make the regex a property of the function itself. The only thing you may not like about this (or you may, I guess it depends) is that the regex can now be modified outside of the function's body. So, someone could do this to modify the interally-used regex:

makeSortString.translate_re = /[a-z]/g;

So, there is that option.

One way to get a closure, and thus prevent someone from modifying the regex, would be to define this as an anonymous function assignment like this:

var makeSortString = (function() {
  var translate_re = /[öäüÖÄÜ]/g;
  return function(s) {
    var translate = {
      "ä": "a", "ö": "o", "ü": "u",
      "Ä": "A", "Ö": "O", "Ü": "U"   // probably more to come
    };
    return ( s.replace(translate_re, function(match) { 
      return translate[match]; 
    }) );
  }
})();

Hopefully this is useful to you.

---

UPDATE: It's early and I don't know why I didn't see the obvious before, but it might also be useful to put you translate object in a closure as well:

var makeSortString = (function() {
  var translate_re = /[öäüÖÄÜ]/g;
  var translate = {
    "ä": "a", "ö": "o", "ü": "u",
    "Ä": "A", "Ö": "O", "Ü": "U"   // probably more to come
  };
  return function(s) {
    return ( s.replace(translate_re, function(match) { 
      return translate[match]; 
    }) );
  }
})();

The correct terminology for such accents is Diacritics. After Googling this term, I found this function which is part of backbone.paginator. It has a very complete collection of Diacritics and replaces them with their most intuitive ascii character. I found this to be the most complete Javascript solution available today.

The full function for future reference:

function removeDiacritics (str) {

  var defaultDiacriticsRemovalMap = [
    {'base':'A', 'letters':/[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F]/g},
    {'base':'AA','letters':/[\uA732]/g},
    {'base':'AE','letters':/[\u00C6\u01FC\u01E2]/g},
    {'base':'AO','letters':/[\uA734]/g},
    {'base':'AU','letters':/[\uA736]/g},
    {'base':'AV','letters':/[\uA738\uA73A]/g},
    {'base':'AY','letters':/[\uA73C]/g},
    {'base':'B', 'letters':/[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181]/g},
    {'base':'C', 'letters':/[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E]/g},
    {'base':'D', 'letters':/[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779]/g},
    {'base':'DZ','letters':/[\u01F1\u01C4]/g},
    {'base':'Dz','letters':/[\u01F2\u01C5]/g},
    {'base':'E', 'letters':/[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E]/g},
    {'base':'F', 'letters':/[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B]/g},
    {'base':'G', 'letters':/[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E]/g},
    {'base':'H', 'letters':/[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D]/g},
    {'base':'I', 'letters':/[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197]/g},
    {'base':'J', 'letters':/[\u004A\u24BF\uFF2A\u0134\u0248]/g},
    {'base':'K', 'letters':/[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2]/g},
    {'base':'L', 'letters':/[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780]/g},
    {'base':'LJ','letters':/[\u01C7]/g},
    {'base':'Lj','letters':/[\u01C8]/g},
    {'base':'M', 'letters':/[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C]/g},
    {'base':'N', 'letters':/[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4]/g},
    {'base':'NJ','letters':/[\u01CA]/g},
    {'base':'Nj','letters':/[\u01CB]/g},
    {'base':'O', 'letters':/[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C]/g},
    {'base':'OI','letters':/[\u01A2]/g},
    {'base':'OO','letters':/[\uA74E]/g},
    {'base':'OU','letters':/[\u0222]/g},
    {'base':'P', 'letters':/[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754]/g},
    {'base':'Q', 'letters':/[\u0051\u24C6\uFF31\uA756\uA758\u024A]/g},
    {'base':'R', 'letters':/[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782]/g},
    {'base':'S', 'letters':/[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784]/g},
    {'base':'T', 'letters':/[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786]/g},
    {'base':'TZ','letters':/[\uA728]/g},
    {'base':'U', 'letters':/[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244]/g},
    {'base':'V', 'letters':/[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245]/g},
    {'base':'VY','letters':/[\uA760]/g},
    {'base':'W', 'letters':/[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72]/g},
    {'base':'X', 'letters':/[\u0058\u24CD\uFF38\u1E8A\u1E8C]/g},
    {'base':'Y', 'letters':/[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE]/g},
    {'base':'Z', 'letters':/[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762]/g},
    {'base':'a', 'letters':/[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250]/g},
    {'base':'aa','letters':/[\uA733]/g},
    {'base':'ae','letters':/[\u00E6\u01FD\u01E3]/g},
    {'base':'ao','letters':/[\uA735]/g},
    {'base':'au','letters':/[\uA737]/g},
    {'base':'av','letters':/[\uA739\uA73B]/g},
    {'base':'ay','letters':/[\uA73D]/g},
    {'base':'b', 'letters':/[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253]/g},
    {'base':'c', 'letters':/[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184]/g},
    {'base':'d', 'letters':/[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A]/g},
    {'base':'dz','letters':/[\u01F3\u01C6]/g},
    {'base':'e', 'letters':/[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD]/g},
    {'base':'f', 'letters':/[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C]/g},
    {'base':'g', 'letters':/[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F]/g},
    {'base':'h', 'letters':/[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265]/g},
    {'base':'hv','letters':/[\u0195]/g},
    {'base':'i', 'letters':/[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131]/g},
    {'base':'j', 'letters':/[\u006A\u24D9\uFF4A\u0135\u01F0\u0249]/g},
    {'base':'k', 'letters':/[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3]/g},
    {'base':'l', 'letters':/[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747]/g},
    {'base':'lj','letters':/[\u01C9]/g},
    {'base':'m', 'letters':/[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F]/g},
    {'base':'n', 'letters':/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g},
    {'base':'nj','letters':/[\u01CC]/g},
    {'base':'o', 'letters':/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g},
    {'base':'oi','letters':/[\u01A3]/g},
    {'base':'ou','letters':/[\u0223]/g},
    {'base':'oo','letters':/[\uA74F]/g},
    {'base':'p','letters':/[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755]/g},
    {'base':'q','letters':/[\u0071\u24E0\uFF51\u024B\uA757\uA759]/g},
    {'base':'r','letters':/[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783]/g},
    {'base':'s','letters':/[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B]/g},
    {'base':'t','letters':/[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787]/g},
    {'base':'tz','letters':/[\uA729]/g},
    {'base':'u','letters':/[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289]/g},
    {'base':'v','letters':/[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C]/g},
    {'base':'vy','letters':/[\uA761]/g},
    {'base':'w','letters':/[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73]/g},
    {'base':'x','letters':/[\u0078\u24E7\uFF58\u1E8B\u1E8D]/g},
    {'base':'y','letters':/[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF]/g},
    {'base':'z','letters':/[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763]/g}
  ];

  for(var i=0; i<defaultDiacriticsRemovalMap.length; i++) {
    str = str.replace(defaultDiacriticsRemovalMap[i].letters, defaultDiacriticsRemovalMap[i].base);
  }

  return str;

}

https://stackoverflow.com/a/37511463

With ES2015/ES6 String.Prototype.Normalize(),

const str = "Crème Brulée"
str.normalize('NFD').replace(/[\u0300-\u036f]/g, "")
> 'Creme Brulee'

Two things are happening here:

1. normalize()ing to NFD Unicode normal form decomposes combined graphemes into the combination of simple ones. The è of Crème ends up expressed as e + ̀.
2. Using a regex character class to match the U+0300 → U+036F range, it is now trivial to globally get rid of the diacritics, which the Unicode standard conveniently groups as the Combining Diacritical Marks Unicode block.

See comment for performance testing.

Alternatively, if you just want sorting

Intl.Collator has sufficient support ~85% right now, a polyfill is also available here but I haven't tested it.

const c = new Intl.Collator();
['creme brulee', 'crème brulée', 'crame brulai', 'crome brouillé',
'creme brulay', 'creme brulfé', 'creme bruléa'].sort(c.compare)
[ 'crame brulai','creme brulay','creme bruléa','creme brulee',
'crème brulée','creme brulfé','crome brouillé' ]


['creme brulee', 'crème brulée', 'crame brulai', 'crome brouillé'].sort((a,b) => a>b)
["crame brulai", "creme brulee", "crome brouillé", "crème brulée"]