intl/dist/Intl.min.js.map

Polyfill the ECMA-402 Intl API (except collation)

{"version":3,"file":"Intl.min.js","sources":["../src/util.js","../src/exp.js","../src/6.locales-currencies-tz.js","../src/9.negotiation.js","../src/8.intl.js","../src/11.numberformat.js","../src/cldr.js","../src/12.datetimeformat.js","../src/13.locale-sensitive-functions.js","../src/core.js","../src/browser-main.js"],"sourcesContent":["const realDefineProp = (function () {\n        let sentinel = {};\n        try {\n            Object.defineProperty(sentinel, 'a', {});\n            return 'a' in sentinel;\n        } catch (e) {\n            return false;\n        }\n    })();\n\n// Need a workaround for getters in ES3\nexport const es3 = !realDefineProp && !Object.prototype.__defineGetter__;\n\n// We use this a lot (and need it for proto-less objects)\nexport const hop = Object.prototype.hasOwnProperty;\n\n// Naive defineProperty for compatibility\nexport const defineProperty = realDefineProp ? Object.defineProperty : function (obj, name, desc) {\n    if ('get' in desc && obj.__defineGetter__)\n        obj.__defineGetter__(name, desc.get);\n\n    else if (!hop.call(obj, name) || 'value' in desc)\n        obj[name] = desc.value;\n};\n\n// Array.prototype.indexOf, as good as we need it to be\nexport const arrIndexOf = Array.prototype.indexOf || function (search) {\n    /*jshint validthis:true */\n    let t = this;\n    if (!t.length)\n        return -1;\n\n    for (let i = arguments[1] || 0, max = t.length; i < max; i++) {\n        if (t[i] === search)\n            return i;\n    }\n\n    return -1;\n};\n\n// Create an object with the specified prototype (2nd arg required for Record)\nexport const objCreate = Object.create || function (proto, props) {\n    let obj;\n\n    function F() {}\n    F.prototype = proto;\n    obj = new F();\n\n    for (let k in props) {\n        if (hop.call(props, k))\n            defineProperty(obj, k, props[k]);\n    }\n\n    return obj;\n};\n\n// Snapshot some (hopefully still) native built-ins\nexport const arrSlice  = Array.prototype.slice;\nexport const arrConcat = Array.prototype.concat;\nexport const arrPush   = Array.prototype.push;\nexport const arrJoin   = Array.prototype.join;\nexport const arrShift  = Array.prototype.shift;\n\n// Naive Function.prototype.bind for compatibility\nexport const fnBind = Function.prototype.bind || function (thisObj) {\n    let fn = this,\n        args = arrSlice.call(arguments, 1);\n\n    // All our (presently) bound functions have either 1 or 0 arguments. By returning\n    // different function signatures, we can pass some tests in ES3 environments\n    if (fn.length === 1) {\n        return function () {\n            return fn.apply(thisObj, arrConcat.call(args, arrSlice.call(arguments)));\n        };\n    }\n    return function () {\n        return fn.apply(thisObj, arrConcat.call(args, arrSlice.call(arguments)));\n    };\n};\n\n// Object housing internal properties for constructors\nexport const internals = objCreate(null);\n\n// Keep internal properties internal\nexport const secret = Math.random();\n\n// Helper functions\n// ================\n\n/**\n * A function to deal with the inaccuracy of calculating log10 in pre-ES6\n * JavaScript environments. Math.log(num) / Math.LN10 was responsible for\n * causing issue #62.\n */\nexport function log10Floor (n) {\n    // ES6 provides the more accurate Math.log10\n    if (typeof Math.log10 === 'function')\n        return Math.floor(Math.log10(n));\n\n    let x = Math.round(Math.log(n) * Math.LOG10E);\n    return x - (Number('1e' + x) > n);\n}\n\n/**\n * A map that doesn't contain Object in its prototype chain\n */\nexport function Record (obj) {\n    // Copy only own properties over unless this object is already a Record instance\n    for (let k in obj) {\n        if (obj instanceof Record || hop.call(obj, k))\n            defineProperty(this, k, { value: obj[k], enumerable: true, writable: true, configurable: true });\n    }\n}\nRecord.prototype = objCreate(null);\n\n/**\n * An ordered list\n */\nexport function List() {\n    defineProperty(this, 'length', { writable:true, value: 0 });\n\n    if (arguments.length)\n        arrPush.apply(this, arrSlice.call(arguments));\n}\nList.prototype = objCreate(null);\n\n/**\n * Constructs a regular expression to restore tainted RegExp properties\n */\nexport function createRegExpRestore () {\n    let esc = /[.?*+^$[\\]\\\\(){}|-]/g,\n        lm  = RegExp.lastMatch || '',\n        ml  = RegExp.multiline ? 'm' : '',\n        ret = { input: RegExp.input },\n        reg = new List(),\n        has = false,\n        cap = {};\n\n    // Create a snapshot of all the 'captured' properties\n    for (let i = 1; i <= 9; i++)\n        has = (cap['$'+i] = RegExp['$'+i]) || has;\n\n    // Now we've snapshotted some properties, escape the lastMatch string\n    lm = lm.replace(esc, '\\\\$&');\n\n    // If any of the captured strings were non-empty, iterate over them all\n    if (has) {\n        for (let i = 1; i <= 9; i++) {\n            let m = cap['$'+i];\n\n            // If it's empty, add an empty capturing group\n            if (!m)\n                lm = '()' + lm;\n\n            // Else find the string in lm and escape & wrap it to capture it\n            else {\n                m = m.replace(esc, '\\\\$&');\n                lm = lm.replace(m, '(' + m + ')');\n            }\n\n            // Push it to the reg and chop lm to make sure further groups come after\n            arrPush.call(reg, lm.slice(0, lm.indexOf('(') + 1));\n            lm = lm.slice(lm.indexOf('(') + 1);\n        }\n    }\n\n    // Create the regular expression that will reconstruct the RegExp properties\n    ret.exp = new RegExp(arrJoin.call(reg, '') + lm, ml);\n\n    return ret;\n}\n\n/**\n * Mimics ES5's abstract ToObject() function\n */\nexport function toObject (arg) {\n    if (arg === null)\n        throw new TypeError('Cannot convert null or undefined to object');\n\n    return Object(arg);\n}\n\n/**\n * Returns \"internal\" properties for an object\n */\nexport function getInternalProperties (obj) {\n    if (hop.call(obj, '__getInternalProperties'))\n        return obj.__getInternalProperties(secret);\n\n    return objCreate(null);\n}\n","/**\n* Defines regular expressions for various operations related to the BCP 47 syntax,\n* as defined at http://tools.ietf.org/html/bcp47#section-2.1\n*/\n\n// extlang       = 3ALPHA              ; selected ISO 639 codes\n//                 *2(\"-\" 3ALPHA)      ; permanently reserved\nconst extlang = '[a-z]{3}(?:-[a-z]{3}){0,2}';\n\n// language      = 2*3ALPHA            ; shortest ISO 639 code\n//                 [\"-\" extlang]       ; sometimes followed by\n//                                     ; extended language subtags\n//               / 4ALPHA              ; or reserved for future use\n//               / 5*8ALPHA            ; or registered language subtag\nconst language = '(?:[a-z]{2,3}(?:-' + extlang + ')?|[a-z]{4}|[a-z]{5,8})';\n\n// script        = 4ALPHA              ; ISO 15924 code\nconst script = '[a-z]{4}';\n\n// region        = 2ALPHA              ; ISO 3166-1 code\n//               / 3DIGIT              ; UN M.49 code\nconst region = '(?:[a-z]{2}|\\\\d{3})';\n\n// variant       = 5*8alphanum         ; registered variants\n//               / (DIGIT 3alphanum)\nconst variant = '(?:[a-z0-9]{5,8}|\\\\d[a-z0-9]{3})';\n\n//                                     ; Single alphanumerics\n//                                     ; \"x\" reserved for private use\n// singleton     = DIGIT               ; 0 - 9\n//               / %x41-57             ; A - W\n//               / %x59-5A             ; Y - Z\n//               / %x61-77             ; a - w\n//               / %x79-7A             ; y - z\nconst singleton = '[0-9a-wy-z]';\n\n// extension     = singleton 1*(\"-\" (2*8alphanum))\nconst extension = singleton + '(?:-[a-z0-9]{2,8})+';\n\n// privateuse    = \"x\" 1*(\"-\" (1*8alphanum))\nconst privateuse = 'x(?:-[a-z0-9]{1,8})+';\n\n// irregular     = \"en-GB-oed\"         ; irregular tags do not match\n//               / \"i-ami\"             ; the 'langtag' production and\n//               / \"i-bnn\"             ; would not otherwise be\n//               / \"i-default\"         ; considered 'well-formed'\n//               / \"i-enochian\"        ; These tags are all valid,\n//               / \"i-hak\"             ; but most are deprecated\n//               / \"i-klingon\"         ; in favor of more modern\n//               / \"i-lux\"             ; subtags or subtag\n//               / \"i-mingo\"           ; combination\n//               / \"i-navajo\"\n//               / \"i-pwn\"\n//               / \"i-tao\"\n//               / \"i-tay\"\n//               / \"i-tsu\"\n//               / \"sgn-BE-FR\"\n//               / \"sgn-BE-NL\"\n//               / \"sgn-CH-DE\"\nconst irregular = '(?:en-GB-oed'\n          + '|i-(?:ami|bnn|default|enochian|hak|klingon|lux|mingo|navajo|pwn|tao|tay|tsu)'\n          + '|sgn-(?:BE-FR|BE-NL|CH-DE))';\n\n// regular       = \"art-lojban\"        ; these tags match the 'langtag'\n//               / \"cel-gaulish\"       ; production, but their subtags\n//               / \"no-bok\"            ; are not extended language\n//               / \"no-nyn\"            ; or variant subtags: their meaning\n//               / \"zh-guoyu\"          ; is defined by their registration\n//               / \"zh-hakka\"          ; and all of these are deprecated\n//               / \"zh-min\"            ; in favor of a more modern\n//               / \"zh-min-nan\"        ; subtag or sequence of subtags\n//               / \"zh-xiang\"\nconst regular = '(?:art-lojban|cel-gaulish|no-bok|no-nyn'\n        + '|zh-(?:guoyu|hakka|min|min-nan|xiang))';\n\n// grandfathered = irregular           ; non-redundant tags registered\n//               / regular             ; during the RFC 3066 era\nconst grandfathered = '(?:' + irregular + '|' + regular + ')';\n\n// langtag       = language\n//                 [\"-\" script]\n//                 [\"-\" region]\n//                 *(\"-\" variant)\n//                 *(\"-\" extension)\n//                 [\"-\" privateuse]\nconst langtag = language + '(?:-' + script + ')?(?:-' + region + ')?(?:-'\n        + variant + ')*(?:-' + extension + ')*(?:-' + privateuse + ')?';\n\n// Language-Tag  = langtag             ; normal language tags\n//               / privateuse          ; private use tag\n//               / grandfathered       ; grandfathered tags\nexport let expBCP47Syntax = RegExp('^(?:'+langtag+'|'+privateuse+'|'+grandfathered+')$', 'i');\n\n// Match duplicate variants in a language tag\nexport let expVariantDupes = RegExp('^(?!x).*?-('+variant+')-(?:\\\\w{4,8}-(?!x-))*\\\\1\\\\b', 'i');\n\n// Match duplicate singletons in a language tag (except in private use)\nexport let expSingletonDupes = RegExp('^(?!x).*?-('+singleton+')-(?:\\\\w+-(?!x-))*\\\\1\\\\b', 'i');\n\n// Match all extension sequences\nexport let expExtSequences = RegExp('-'+extension, 'ig');\n","// Sect 6.2 Language Tags\n// ======================\n\nimport {\n    expBCP47Syntax,\n    expExtSequences,\n    expVariantDupes,\n    expSingletonDupes,\n} from './exp';\n\nimport {\n    hop,\n    arrJoin,\n    arrSlice,\n} from \"./util.js\";\n\n// Default locale is the first-added locale data for us\nexport let defaultLocale;\nexport function setDefaultLocale(locale) {\n    defaultLocale = locale;\n}\n\n// IANA Subtag Registry redundant tag and subtag maps\nconst redundantTags = {\n    tags: {\n        \"art-lojban\": \"jbo\",\n        \"i-ami\": \"ami\",\n        \"i-bnn\": \"bnn\",\n        \"i-hak\": \"hak\",\n        \"i-klingon\": \"tlh\",\n        \"i-lux\": \"lb\",\n        \"i-navajo\": \"nv\",\n        \"i-pwn\": \"pwn\",\n        \"i-tao\": \"tao\",\n        \"i-tay\": \"tay\",\n        \"i-tsu\": \"tsu\",\n        \"no-bok\": \"nb\",\n        \"no-nyn\": \"nn\",\n        \"sgn-BE-FR\": \"sfb\",\n        \"sgn-BE-NL\": \"vgt\",\n        \"sgn-CH-DE\": \"sgg\",\n        \"zh-guoyu\": \"cmn\",\n        \"zh-hakka\": \"hak\",\n        \"zh-min-nan\": \"nan\",\n        \"zh-xiang\": \"hsn\",\n        \"sgn-BR\": \"bzs\",\n        \"sgn-CO\": \"csn\",\n        \"sgn-DE\": \"gsg\",\n        \"sgn-DK\": \"dsl\",\n        \"sgn-ES\": \"ssp\",\n        \"sgn-FR\": \"fsl\",\n        \"sgn-GB\": \"bfi\",\n        \"sgn-GR\": \"gss\",\n        \"sgn-IE\": \"isg\",\n        \"sgn-IT\": \"ise\",\n        \"sgn-JP\": \"jsl\",\n        \"sgn-MX\": \"mfs\",\n        \"sgn-NI\": \"ncs\",\n        \"sgn-NL\": \"dse\",\n        \"sgn-NO\": \"nsl\",\n        \"sgn-PT\": \"psr\",\n        \"sgn-SE\": \"swl\",\n        \"sgn-US\": \"ase\",\n        \"sgn-ZA\": \"sfs\",\n        \"zh-cmn\": \"cmn\",\n        \"zh-cmn-Hans\": \"cmn-Hans\",\n        \"zh-cmn-Hant\": \"cmn-Hant\",\n        \"zh-gan\": \"gan\",\n        \"zh-wuu\": \"wuu\",\n        \"zh-yue\": \"yue\",\n    },\n    subtags: {\n        BU: \"MM\",\n        DD: \"DE\",\n        FX: \"FR\",\n        TP: \"TL\",\n        YD: \"YE\",\n        ZR: \"CD\",\n        heploc: \"alalc97\",\n        'in': \"id\",\n        iw: \"he\",\n        ji: \"yi\",\n        jw: \"jv\",\n        mo: \"ro\",\n        ayx: \"nun\",\n        bjd: \"drl\",\n        ccq: \"rki\",\n        cjr: \"mom\",\n        cka: \"cmr\",\n        cmk: \"xch\",\n        drh: \"khk\",\n        drw: \"prs\",\n        gav: \"dev\",\n        hrr: \"jal\",\n        ibi: \"opa\",\n        kgh: \"kml\",\n        lcq: \"ppr\",\n        mst: \"mry\",\n        myt: \"mry\",\n        sca: \"hle\",\n        tie: \"ras\",\n        tkk: \"twm\",\n        tlw: \"weo\",\n        tnf: \"prs\",\n        ybd: \"rki\",\n        yma: \"lrr\",\n    },\n    extLang: {\n        aao: [\"aao\", \"ar\"],\n        abh: [\"abh\", \"ar\"],\n        abv: [\"abv\", \"ar\"],\n        acm: [\"acm\", \"ar\"],\n        acq: [\"acq\", \"ar\"],\n        acw: [\"acw\", \"ar\"],\n        acx: [\"acx\", \"ar\"],\n        acy: [\"acy\", \"ar\"],\n        adf: [\"adf\", \"ar\"],\n        ads: [\"ads\", \"sgn\"],\n        aeb: [\"aeb\", \"ar\"],\n        aec: [\"aec\", \"ar\"],\n        aed: [\"aed\", \"sgn\"],\n        aen: [\"aen\", \"sgn\"],\n        afb: [\"afb\", \"ar\"],\n        afg: [\"afg\", \"sgn\"],\n        ajp: [\"ajp\", \"ar\"],\n        apc: [\"apc\", \"ar\"],\n        apd: [\"apd\", \"ar\"],\n        arb: [\"arb\", \"ar\"],\n        arq: [\"arq\", \"ar\"],\n        ars: [\"ars\", \"ar\"],\n        ary: [\"ary\", \"ar\"],\n        arz: [\"arz\", \"ar\"],\n        ase: [\"ase\", \"sgn\"],\n        asf: [\"asf\", \"sgn\"],\n        asp: [\"asp\", \"sgn\"],\n        asq: [\"asq\", \"sgn\"],\n        asw: [\"asw\", \"sgn\"],\n        auz: [\"auz\", \"ar\"],\n        avl: [\"avl\", \"ar\"],\n        ayh: [\"ayh\", \"ar\"],\n        ayl: [\"ayl\", \"ar\"],\n        ayn: [\"ayn\", \"ar\"],\n        ayp: [\"ayp\", \"ar\"],\n        bbz: [\"bbz\", \"ar\"],\n        bfi: [\"bfi\", \"sgn\"],\n        bfk: [\"bfk\", \"sgn\"],\n        bjn: [\"bjn\", \"ms\"],\n        bog: [\"bog\", \"sgn\"],\n        bqn: [\"bqn\", \"sgn\"],\n        bqy: [\"bqy\", \"sgn\"],\n        btj: [\"btj\", \"ms\"],\n        bve: [\"bve\", \"ms\"],\n        bvl: [\"bvl\", \"sgn\"],\n        bvu: [\"bvu\", \"ms\"],\n        bzs: [\"bzs\", \"sgn\"],\n        cdo: [\"cdo\", \"zh\"],\n        cds: [\"cds\", \"sgn\"],\n        cjy: [\"cjy\", \"zh\"],\n        cmn: [\"cmn\", \"zh\"],\n        coa: [\"coa\", \"ms\"],\n        cpx: [\"cpx\", \"zh\"],\n        csc: [\"csc\", \"sgn\"],\n        csd: [\"csd\", \"sgn\"],\n        cse: [\"cse\", \"sgn\"],\n        csf: [\"csf\", \"sgn\"],\n        csg: [\"csg\", \"sgn\"],\n        csl: [\"csl\", \"sgn\"],\n        csn: [\"csn\", \"sgn\"],\n        csq: [\"csq\", \"sgn\"],\n        csr: [\"csr\", \"sgn\"],\n        czh: [\"czh\", \"zh\"],\n        czo: [\"czo\", \"zh\"],\n        doq: [\"doq\", \"sgn\"],\n        dse: [\"dse\", \"sgn\"],\n        dsl: [\"dsl\", \"sgn\"],\n        dup: [\"dup\", \"ms\"],\n        ecs: [\"ecs\", \"sgn\"],\n        esl: [\"esl\", \"sgn\"],\n        esn: [\"esn\", \"sgn\"],\n        eso: [\"eso\", \"sgn\"],\n        eth: [\"eth\", \"sgn\"],\n        fcs: [\"fcs\", \"sgn\"],\n        fse: [\"fse\", \"sgn\"],\n        fsl: [\"fsl\", \"sgn\"],\n        fss: [\"fss\", \"sgn\"],\n        gan: [\"gan\", \"zh\"],\n        gds: [\"gds\", \"sgn\"],\n        gom: [\"gom\", \"kok\"],\n        gse: [\"gse\", \"sgn\"],\n        gsg: [\"gsg\", \"sgn\"],\n        gsm: [\"gsm\", \"sgn\"],\n        gss: [\"gss\", \"sgn\"],\n        gus: [\"gus\", \"sgn\"],\n        hab: [\"hab\", \"sgn\"],\n        haf: [\"haf\", \"sgn\"],\n        hak: [\"hak\", \"zh\"],\n        hds: [\"hds\", \"sgn\"],\n        hji: [\"hji\", \"ms\"],\n        hks: [\"hks\", \"sgn\"],\n        hos: [\"hos\", \"sgn\"],\n        hps: [\"hps\", \"sgn\"],\n        hsh: [\"hsh\", \"sgn\"],\n        hsl: [\"hsl\", \"sgn\"],\n        hsn: [\"hsn\", \"zh\"],\n        icl: [\"icl\", \"sgn\"],\n        ils: [\"ils\", \"sgn\"],\n        inl: [\"inl\", \"sgn\"],\n        ins: [\"ins\", \"sgn\"],\n        ise: [\"ise\", \"sgn\"],\n        isg: [\"isg\", \"sgn\"],\n        isr: [\"isr\", \"sgn\"],\n        jak: [\"jak\", \"ms\"],\n        jax: [\"jax\", \"ms\"],\n        jcs: [\"jcs\", \"sgn\"],\n        jhs: [\"jhs\", \"sgn\"],\n        jls: [\"jls\", \"sgn\"],\n        jos: [\"jos\", \"sgn\"],\n        jsl: [\"jsl\", \"sgn\"],\n        jus: [\"jus\", \"sgn\"],\n        kgi: [\"kgi\", \"sgn\"],\n        knn: [\"knn\", \"kok\"],\n        kvb: [\"kvb\", \"ms\"],\n        kvk: [\"kvk\", \"sgn\"],\n        kvr: [\"kvr\", \"ms\"],\n        kxd: [\"kxd\", \"ms\"],\n        lbs: [\"lbs\", \"sgn\"],\n        lce: [\"lce\", \"ms\"],\n        lcf: [\"lcf\", \"ms\"],\n        liw: [\"liw\", \"ms\"],\n        lls: [\"lls\", \"sgn\"],\n        lsg: [\"lsg\", \"sgn\"],\n        lsl: [\"lsl\", \"sgn\"],\n        lso: [\"lso\", \"sgn\"],\n        lsp: [\"lsp\", \"sgn\"],\n        lst: [\"lst\", \"sgn\"],\n        lsy: [\"lsy\", \"sgn\"],\n        ltg: [\"ltg\", \"lv\"],\n        lvs: [\"lvs\", \"lv\"],\n        lzh: [\"lzh\", \"zh\"],\n        max: [\"max\", \"ms\"],\n        mdl: [\"mdl\", \"sgn\"],\n        meo: [\"meo\", \"ms\"],\n        mfa: [\"mfa\", \"ms\"],\n        mfb: [\"mfb\", \"ms\"],\n        mfs: [\"mfs\", \"sgn\"],\n        min: [\"min\", \"ms\"],\n        mnp: [\"mnp\", \"zh\"],\n        mqg: [\"mqg\", \"ms\"],\n        mre: [\"mre\", \"sgn\"],\n        msd: [\"msd\", \"sgn\"],\n        msi: [\"msi\", \"ms\"],\n        msr: [\"msr\", \"sgn\"],\n        mui: [\"mui\", \"ms\"],\n        mzc: [\"mzc\", \"sgn\"],\n        mzg: [\"mzg\", \"sgn\"],\n        mzy: [\"mzy\", \"sgn\"],\n        nan: [\"nan\", \"zh\"],\n        nbs: [\"nbs\", \"sgn\"],\n        ncs: [\"ncs\", \"sgn\"],\n        nsi: [\"nsi\", \"sgn\"],\n        nsl: [\"nsl\", \"sgn\"],\n        nsp: [\"nsp\", \"sgn\"],\n        nsr: [\"nsr\", \"sgn\"],\n        nzs: [\"nzs\", \"sgn\"],\n        okl: [\"okl\", \"sgn\"],\n        orn: [\"orn\", \"ms\"],\n        ors: [\"ors\", \"ms\"],\n        pel: [\"pel\", \"ms\"],\n        pga: [\"pga\", \"ar\"],\n        pks: [\"pks\", \"sgn\"],\n        prl: [\"prl\", \"sgn\"],\n        prz: [\"prz\", \"sgn\"],\n        psc: [\"psc\", \"sgn\"],\n        psd: [\"psd\", \"sgn\"],\n        pse: [\"pse\", \"ms\"],\n        psg: [\"psg\", \"sgn\"],\n        psl: [\"psl\", \"sgn\"],\n        pso: [\"pso\", \"sgn\"],\n        psp: [\"psp\", \"sgn\"],\n        psr: [\"psr\", \"sgn\"],\n        pys: [\"pys\", \"sgn\"],\n        rms: [\"rms\", \"sgn\"],\n        rsi: [\"rsi\", \"sgn\"],\n        rsl: [\"rsl\", \"sgn\"],\n        sdl: [\"sdl\", \"sgn\"],\n        sfb: [\"sfb\", \"sgn\"],\n        sfs: [\"sfs\", \"sgn\"],\n        sgg: [\"sgg\", \"sgn\"],\n        sgx: [\"sgx\", \"sgn\"],\n        shu: [\"shu\", \"ar\"],\n        slf: [\"slf\", \"sgn\"],\n        sls: [\"sls\", \"sgn\"],\n        sqk: [\"sqk\", \"sgn\"],\n        sqs: [\"sqs\", \"sgn\"],\n        ssh: [\"ssh\", \"ar\"],\n        ssp: [\"ssp\", \"sgn\"],\n        ssr: [\"ssr\", \"sgn\"],\n        svk: [\"svk\", \"sgn\"],\n        swc: [\"swc\", \"sw\"],\n        swh: [\"swh\", \"sw\"],\n        swl: [\"swl\", \"sgn\"],\n        syy: [\"syy\", \"sgn\"],\n        tmw: [\"tmw\", \"ms\"],\n        tse: [\"tse\", \"sgn\"],\n        tsm: [\"tsm\", \"sgn\"],\n        tsq: [\"tsq\", \"sgn\"],\n        tss: [\"tss\", \"sgn\"],\n        tsy: [\"tsy\", \"sgn\"],\n        tza: [\"tza\", \"sgn\"],\n        ugn: [\"ugn\", \"sgn\"],\n        ugy: [\"ugy\", \"sgn\"],\n        ukl: [\"ukl\", \"sgn\"],\n        uks: [\"uks\", \"sgn\"],\n        urk: [\"urk\", \"ms\"],\n        uzn: [\"uzn\", \"uz\"],\n        uzs: [\"uzs\", \"uz\"],\n        vgt: [\"vgt\", \"sgn\"],\n        vkk: [\"vkk\", \"ms\"],\n        vkt: [\"vkt\", \"ms\"],\n        vsi: [\"vsi\", \"sgn\"],\n        vsl: [\"vsl\", \"sgn\"],\n        vsv: [\"vsv\", \"sgn\"],\n        wuu: [\"wuu\", \"zh\"],\n        xki: [\"xki\", \"sgn\"],\n        xml: [\"xml\", \"sgn\"],\n        xmm: [\"xmm\", \"ms\"],\n        xms: [\"xms\", \"sgn\"],\n        yds: [\"yds\", \"sgn\"],\n        ysl: [\"ysl\", \"sgn\"],\n        yue: [\"yue\", \"zh\"],\n        zib: [\"zib\", \"sgn\"],\n        zlm: [\"zlm\", \"ms\"],\n        zmi: [\"zmi\", \"ms\"],\n        zsl: [\"zsl\", \"sgn\"],\n        zsm: [\"zsm\", \"ms\"],\n    },\n};\n\n/**\n * Convert only a-z to uppercase as per section 6.1 of the spec\n */\nexport function toLatinUpperCase (str) {\n    let i = str.length;\n\n    while (i--) {\n        let ch = str.charAt(i);\n\n        if (ch >= \"a\" && ch <= \"z\")\n            str = str.slice(0, i) + ch.toUpperCase() + str.slice(i+1);\n    }\n\n    return str;\n}\n\n/**\n * The IsStructurallyValidLanguageTag abstract operation verifies that the locale\n * argument (which must be a String value)\n *\n * - represents a well-formed BCP 47 language tag as specified in RFC 5646 section\n *   2.1, or successor,\n * - does not include duplicate variant subtags, and\n * - does not include duplicate singleton subtags.\n *\n * The abstract operation returns true if locale can be generated from the ABNF\n * grammar in section 2.1 of the RFC, starting with Language-Tag, and does not\n * contain duplicate variant or singleton subtags (other than as a private use\n * subtag). It returns false otherwise. Terminal value characters in the grammar are\n * interpreted as the Unicode equivalents of the ASCII octet values given.\n */\nexport function /* 6.2.2 */IsStructurallyValidLanguageTag(locale) {\n    // represents a well-formed BCP 47 language tag as specified in RFC 5646\n    if (!expBCP47Syntax.test(locale))\n        return false;\n\n    // does not include duplicate variant subtags, and\n    if (expVariantDupes.test(locale))\n        return false;\n\n    // does not include duplicate singleton subtags.\n    if (expSingletonDupes.test(locale))\n        return false;\n\n    return true;\n}\n\n/**\n * The CanonicalizeLanguageTag abstract operation returns the canonical and case-\n * regularized form of the locale argument (which must be a String value that is\n * a structurally valid BCP 47 language tag as verified by the\n * IsStructurallyValidLanguageTag abstract operation). It takes the steps\n * specified in RFC 5646 section 4.5, or successor, to bring the language tag\n * into canonical form, and to regularize the case of the subtags, but does not\n * take the steps to bring a language tag into “extlang form” and to reorder\n * variant subtags.\n\n * The specifications for extensions to BCP 47 language tags, such as RFC 6067,\n * may include canonicalization rules for the extension subtag sequences they\n * define that go beyond the canonicalization rules of RFC 5646 section 4.5.\n * Implementations are allowed, but not required, to apply these additional rules.\n */\nexport function /* 6.2.3 */CanonicalizeLanguageTag (locale) {\n    let match, parts;\n\n    // A language tag is in 'canonical form' when the tag is well-formed\n    // according to the rules in Sections 2.1 and 2.2\n\n    // Section 2.1 says all subtags use lowercase...\n    locale = locale.toLowerCase();\n\n    // ...with 2 exceptions: 'two-letter and four-letter subtags that neither\n    // appear at the start of the tag nor occur after singletons.  Such two-letter\n    // subtags are all uppercase (as in the tags \"en-CA-x-ca\" or \"sgn-BE-FR\") and\n    // four-letter subtags are titlecase (as in the tag \"az-Latn-x-latn\").\n    parts = locale.split('-');\n    for (let i = 1, max = parts.length; i < max; i++) {\n        // Two-letter subtags are all uppercase\n        if (parts[i].length === 2)\n            parts[i] = parts[i].toUpperCase();\n\n        // Four-letter subtags are titlecase\n        else if (parts[i].length === 4)\n            parts[i] = parts[i].charAt(0).toUpperCase() + parts[i].slice(1);\n\n        // Is it a singleton?\n        else if (parts[i].length === 1 && parts[i] !== 'x')\n            break;\n    }\n    locale = arrJoin.call(parts, '-');\n\n    // The steps laid out in RFC 5646 section 4.5 are as follows:\n\n    // 1.  Extension sequences are ordered into case-insensitive ASCII order\n    //     by singleton subtag.\n    if ((match = locale.match(expExtSequences)) && match.length > 1) {\n        // The built-in sort() sorts by ASCII order, so use that\n        match.sort();\n\n        // Replace all extensions with the joined, sorted array\n        locale = locale.replace(\n            RegExp('(?:' + expExtSequences.source + ')+', 'i'),\n            arrJoin.call(match, '')\n        );\n    }\n\n    // 2.  Redundant or grandfathered tags are replaced by their 'Preferred-\n    //     Value', if there is one.\n    if (hop.call(redundantTags.tags, locale))\n        locale = redundantTags.tags[locale];\n\n    // 3.  Subtags are replaced by their 'Preferred-Value', if there is one.\n    //     For extlangs, the original primary language subtag is also\n    //     replaced if there is a primary language subtag in the 'Preferred-\n    //     Value'.\n    parts = locale.split('-');\n\n    for (let i = 1, max = parts.length; i < max; i++) {\n        if (hop.call(redundantTags.subtags, parts[i]))\n            parts[i] = redundantTags.subtags[parts[i]];\n\n        else if (hop.call(redundantTags.extLang, parts[i])) {\n            parts[i] = redundantTags.extLang[parts[i]][0];\n\n            // For extlang tags, the prefix needs to be removed if it is redundant\n            if (i === 1 && redundantTags.extLang[parts[1]][1] === parts[0]) {\n                parts = arrSlice.call(parts, i++);\n                max -= 1;\n            }\n        }\n    }\n\n    return arrJoin.call(parts, '-');\n}\n\n/**\n * The DefaultLocale abstract operation returns a String value representing the\n * structurally valid (6.2.2) and canonicalized (6.2.3) BCP 47 language tag for the\n * host environment’s current locale.\n */\nexport function /* 6.2.4 */DefaultLocale () {\n    return defaultLocale;\n}\n\n// Sect 6.3 Currency Codes\n// =======================\n\nconst expCurrencyCode = /^[A-Z]{3}$/;\n\n/**\n * The IsWellFormedCurrencyCode abstract operation verifies that the currency argument\n * (after conversion to a String value) represents a well-formed 3-letter ISO currency\n * code. The following steps are taken:\n */\nexport function /* 6.3.1 */IsWellFormedCurrencyCode(currency) {\n    // 1. Let `c` be ToString(currency)\n    let c = String(currency);\n\n    // 2. Let `normalized` be the result of mapping c to upper case as described\n    //    in 6.1.\n    let normalized = toLatinUpperCase(c);\n\n    // 3. If the string length of normalized is not 3, return false.\n    // 4. If normalized contains any character that is not in the range \"A\" to \"Z\"\n    //    (U+0041 to U+005A), return false.\n    if (expCurrencyCode.test(normalized) === false)\n        return false;\n\n    // 5. Return true\n    return true;\n}\n","// Sect 9.2 Abstract Operations\n// ============================\n\nimport {\n    List,\n    toObject,\n    arrIndexOf,\n    arrPush,\n    arrSlice,\n    Record,\n    hop,\n    defineProperty,\n} from \"./util.js\";\n\nimport {\n    IsStructurallyValidLanguageTag,\n    CanonicalizeLanguageTag,\n    DefaultLocale,\n} from \"./6.locales-currencies-tz.js\";\n\nconst expUnicodeExSeq = /-u(?:-[0-9a-z]{2,8})+/gi; // See `extension` below\n\nexport function /* 9.2.1 */CanonicalizeLocaleList (locales) {\n// The abstract operation CanonicalizeLocaleList takes the following steps:\n\n    // 1. If locales is undefined, then a. Return a new empty List\n    if (locales === undefined)\n        return new List();\n\n    // 2. Let seen be a new empty List.\n    let seen = new List();\n\n    // 3. If locales is a String value, then\n    //    a. Let locales be a new array created as if by the expression new\n    //    Array(locales) where Array is the standard built-in constructor with\n    //    that name and locales is the value of locales.\n    locales = typeof locales === 'string' ? [ locales ] : locales;\n\n    // 4. Let O be ToObject(locales).\n    let O = toObject(locales);\n\n    // 5. Let lenValue be the result of calling the [[Get]] internal method of\n    //    O with the argument \"length\".\n    // 6. Let len be ToUint32(lenValue).\n    let len = O.length;\n\n    // 7. Let k be 0.\n    let k = 0;\n\n    // 8. Repeat, while k < len\n    while (k < len) {\n        // a. Let Pk be ToString(k).\n        let Pk = String(k);\n\n        // b. Let kPresent be the result of calling the [[HasProperty]] internal\n        //    method of O with argument Pk.\n        let kPresent = Pk in O;\n\n        // c. If kPresent is true, then\n        if (kPresent) {\n            // i. Let kValue be the result of calling the [[Get]] internal\n            //     method of O with argument Pk.\n            let kValue = O[Pk];\n\n            // ii. If the type of kValue is not String or Object, then throw a\n            //     TypeError exception.\n            if (kValue === null || (typeof kValue !== 'string' && typeof kValue !== 'object'))\n                throw new TypeError('String or Object type expected');\n\n            // iii. Let tag be ToString(kValue).\n            let tag = String(kValue);\n\n            // iv. If the result of calling the abstract operation\n            //     IsStructurallyValidLanguageTag (defined in 6.2.2), passing tag as\n            //     the argument, is false, then throw a RangeError exception.\n            if (!IsStructurallyValidLanguageTag(tag))\n                throw new RangeError(\"'\" + tag + \"' is not a structurally valid language tag\");\n\n            // v. Let tag be the result of calling the abstract operation\n            //    CanonicalizeLanguageTag (defined in 6.2.3), passing tag as the\n            //    argument.\n            tag = CanonicalizeLanguageTag(tag);\n\n            // vi. If tag is not an element of seen, then append tag as the last\n            //     element of seen.\n            if (arrIndexOf.call(seen, tag) === -1)\n                arrPush.call(seen, tag);\n        }\n\n        // d. Increase k by 1.\n        k++;\n    }\n\n    // 9. Return seen.\n    return seen;\n}\n\n/**\n * The BestAvailableLocale abstract operation compares the provided argument\n * locale, which must be a String value with a structurally valid and\n * canonicalized BCP 47 language tag, against the locales in availableLocales and\n * returns either the longest non-empty prefix of locale that is an element of\n * availableLocales, or undefined if there is no such element. It uses the\n * fallback mechanism of RFC 4647, section 3.4. The following steps are taken:\n */\nexport function /* 9.2.2 */BestAvailableLocale (availableLocales, locale) {\n    // 1. Let candidate be locale\n    let candidate = locale;\n\n    // 2. Repeat\n    while (candidate) {\n        // a. If availableLocales contains an element equal to candidate, then return\n        // candidate.\n        if (arrIndexOf.call(availableLocales, candidate) > -1)\n            return candidate;\n\n        // b. Let pos be the character index of the last occurrence of \"-\"\n        // (U+002D) within candidate. If that character does not occur, return\n        // undefined.\n        let pos = candidate.lastIndexOf('-');\n\n        if (pos < 0)\n            return;\n\n        // c. If pos ≥ 2 and the character \"-\" occurs at index pos-2 of candidate,\n        //    then decrease pos by 2.\n        if (pos >= 2 && candidate.charAt(pos - 2) === '-')\n            pos -= 2;\n\n        // d. Let candidate be the substring of candidate from position 0, inclusive,\n        //    to position pos, exclusive.\n        candidate = candidate.substring(0, pos);\n    }\n}\n\n/**\n * The LookupMatcher abstract operation compares requestedLocales, which must be\n * a List as returned by CanonicalizeLocaleList, against the locales in\n * availableLocales and determines the best available language to meet the\n * request. The following steps are taken:\n */\nexport function /* 9.2.3 */LookupMatcher (availableLocales, requestedLocales) {\n    // 1. Let i be 0.\n    let i = 0;\n\n    // 2. Let len be the number of elements in requestedLocales.\n    let len = requestedLocales.length;\n\n    // 3. Let availableLocale be undefined.\n    let availableLocale;\n\n    let locale, noExtensionsLocale;\n\n    // 4. Repeat while i < len and availableLocale is undefined:\n    while (i < len && !availableLocale) {\n        // a. Let locale be the element of requestedLocales at 0-origined list\n        //    position i.\n        locale = requestedLocales[i];\n\n        // b. Let noExtensionsLocale be the String value that is locale with all\n        //    Unicode locale extension sequences removed.\n        noExtensionsLocale = String(locale).replace(expUnicodeExSeq, '');\n\n        // c. Let availableLocale be the result of calling the\n        //    BestAvailableLocale abstract operation (defined in 9.2.2) with\n        //    arguments availableLocales and noExtensionsLocale.\n        availableLocale = BestAvailableLocale(availableLocales, noExtensionsLocale);\n\n        // d. Increase i by 1.\n        i++;\n    }\n\n    // 5. Let result be a new Record.\n    let result = new Record();\n\n    // 6. If availableLocale is not undefined, then\n    if (availableLocale !== undefined) {\n        // a. Set result.[[locale]] to availableLocale.\n        result['[[locale]]'] = availableLocale;\n\n        // b. If locale and noExtensionsLocale are not the same String value, then\n        if (String(locale) !== String(noExtensionsLocale)) {\n            // i. Let extension be the String value consisting of the first\n            //    substring of locale that is a Unicode locale extension sequence.\n            let extension = locale.match(expUnicodeExSeq)[0];\n\n            // ii. Let extensionIndex be the character position of the initial\n            //     \"-\" of the first Unicode locale extension sequence within locale.\n            let extensionIndex = locale.indexOf('-u-');\n\n            // iii. Set result.[[extension]] to extension.\n            result['[[extension]]'] = extension;\n\n            // iv. Set result.[[extensionIndex]] to extensionIndex.\n            result['[[extensionIndex]]'] = extensionIndex;\n        }\n    }\n    // 7. Else\n    else\n        // a. Set result.[[locale]] to the value returned by the DefaultLocale abstract\n        //    operation (defined in 6.2.4).\n        result['[[locale]]'] = DefaultLocale();\n\n    // 8. Return result\n    return result;\n}\n\n/**\n * The BestFitMatcher abstract operation compares requestedLocales, which must be\n * a List as returned by CanonicalizeLocaleList, against the locales in\n * availableLocales and determines the best available language to meet the\n * request. The algorithm is implementation dependent, but should produce results\n * that a typical user of the requested locales would perceive as at least as\n * good as those produced by the LookupMatcher abstract operation. Options\n * specified through Unicode locale extension sequences must be ignored by the\n * algorithm. Information about such subsequences is returned separately.\n * The abstract operation returns a record with a [[locale]] field, whose value\n * is the language tag of the selected locale, which must be an element of\n * availableLocales. If the language tag of the request locale that led to the\n * selected locale contained a Unicode locale extension sequence, then the\n * returned record also contains an [[extension]] field whose value is the first\n * Unicode locale extension sequence, and an [[extensionIndex]] field whose value\n * is the index of the first Unicode locale extension sequence within the request\n * locale language tag.\n */\nexport function /* 9.2.4 */BestFitMatcher (availableLocales, requestedLocales) {\n    return LookupMatcher(availableLocales, requestedLocales);\n}\n\n/**\n * The ResolveLocale abstract operation compares a BCP 47 language priority list\n * requestedLocales against the locales in availableLocales and determines the\n * best available language to meet the request. availableLocales and\n * requestedLocales must be provided as List values, options as a Record.\n */\nexport function /* 9.2.5 */ResolveLocale (availableLocales, requestedLocales, options, relevantExtensionKeys, localeData) {\n    if (availableLocales.length === 0) {\n        throw new ReferenceError('No locale data has been provided for this object yet.');\n    }\n\n    // The following steps are taken:\n    // 1. Let matcher be the value of options.[[localeMatcher]].\n    let matcher = options['[[localeMatcher]]'];\n\n    let r;\n\n    // 2. If matcher is \"lookup\", then\n    if (matcher === 'lookup')\n        // a. Let r be the result of calling the LookupMatcher abstract operation\n        //    (defined in 9.2.3) with arguments availableLocales and\n        //    requestedLocales.\n        r = LookupMatcher(availableLocales, requestedLocales);\n\n    // 3. Else\n    else\n        // a. Let r be the result of calling the BestFitMatcher abstract\n        //    operation (defined in 9.2.4) with arguments availableLocales and\n        //    requestedLocales.\n        r = BestFitMatcher(availableLocales, requestedLocales);\n\n    // 4. Let foundLocale be the value of r.[[locale]].\n    let foundLocale = r['[[locale]]'];\n\n    let extensionSubtags, extensionSubtagsLength;\n\n    // 5. If r has an [[extension]] field, then\n    if (hop.call(r, '[[extension]]')) {\n        // a. Let extension be the value of r.[[extension]].\n        let extension = r['[[extension]]'];\n        // b. Let split be the standard built-in function object defined in ES5,\n        //    15.5.4.14.\n        let split = String.prototype.split;\n        // c. Let extensionSubtags be the result of calling the [[Call]] internal\n        //    method of split with extension as the this value and an argument\n        //    list containing the single item \"-\".\n        extensionSubtags = split.call(extension, '-');\n        // d. Let extensionSubtagsLength be the result of calling the [[Get]]\n        //    internal method of extensionSubtags with argument \"length\".\n        extensionSubtagsLength = extensionSubtags.length;\n    }\n\n    // 6. Let result be a new Record.\n    let result = new Record();\n\n    // 7. Set result.[[dataLocale]] to foundLocale.\n    result['[[dataLocale]]'] = foundLocale;\n\n    // 8. Let supportedExtension be \"-u\".\n    let supportedExtension = '-u';\n    // 9. Let i be 0.\n    let i = 0;\n    // 10. Let len be the result of calling the [[Get]] internal method of\n    //     relevantExtensionKeys with argument \"length\".\n    let len = relevantExtensionKeys.length;\n\n    // 11 Repeat while i < len:\n    while (i < len) {\n        // a. Let key be the result of calling the [[Get]] internal method of\n        //    relevantExtensionKeys with argument ToString(i).\n        let key = relevantExtensionKeys[i];\n        // b. Let foundLocaleData be the result of calling the [[Get]] internal\n        //    method of localeData with the argument foundLocale.\n        let foundLocaleData = localeData[foundLocale];\n        // c. Let keyLocaleData be the result of calling the [[Get]] internal\n        //    method of foundLocaleData with the argument key.\n        let keyLocaleData = foundLocaleData[key];\n        // d. Let value be the result of calling the [[Get]] internal method of\n        //    keyLocaleData with argument \"0\".\n        let value = keyLocaleData['0'];\n        // e. Let supportedExtensionAddition be \"\".\n        let supportedExtensionAddition = '';\n        // f. Let indexOf be the standard built-in function object defined in\n        //    ES5, 15.4.4.14.\n        let indexOf = arrIndexOf;\n\n        // g. If extensionSubtags is not undefined, then\n        if (extensionSubtags !== undefined) {\n            // i. Let keyPos be the result of calling the [[Call]] internal\n            //    method of indexOf with extensionSubtags as the this value and\n            // an argument list containing the single item key.\n            let keyPos = indexOf.call(extensionSubtags, key);\n\n            // ii. If keyPos ≠ -1, then\n            if (keyPos !== -1) {\n                // 1. If keyPos + 1 < extensionSubtagsLength and the length of the\n                //    result of calling the [[Get]] internal method of\n                //    extensionSubtags with argument ToString(keyPos +1) is greater\n                //    than 2, then\n                if (keyPos + 1 < extensionSubtagsLength\n                        && extensionSubtags[keyPos + 1].length > 2) {\n                    // a. Let requestedValue be the result of calling the [[Get]]\n                    //    internal method of extensionSubtags with argument\n                    //    ToString(keyPos + 1).\n                    let requestedValue = extensionSubtags[keyPos + 1];\n                    // b. Let valuePos be the result of calling the [[Call]]\n                    //    internal method of indexOf with keyLocaleData as the\n                    //    this value and an argument list containing the single\n                    //    item requestedValue.\n                    let valuePos = indexOf.call(keyLocaleData, requestedValue);\n\n                    // c. If valuePos ≠ -1, then\n                    if (valuePos !== -1) {\n                        // i. Let value be requestedValue.\n                        value = requestedValue,\n                        // ii. Let supportedExtensionAddition be the\n                        //     concatenation of \"-\", key, \"-\", and value.\n                        supportedExtensionAddition = '-' + key + '-' + value;\n                    }\n                }\n                // 2. Else\n                else {\n                    // a. Let valuePos be the result of calling the [[Call]]\n                    // internal method of indexOf with keyLocaleData as the this\n                    // value and an argument list containing the single item\n                    // \"true\".\n                    let valuePos = indexOf(keyLocaleData, 'true');\n\n                    // b. If valuePos ≠ -1, then\n                    if (valuePos !== -1)\n                        // i. Let value be \"true\".\n                        value = 'true';\n                }\n            }\n        }\n        // h. If options has a field [[<key>]], then\n        if (hop.call(options, '[[' + key + ']]')) {\n            // i. Let optionsValue be the value of options.[[<key>]].\n            let optionsValue = options['[[' + key + ']]'];\n\n            // ii. If the result of calling the [[Call]] internal method of indexOf\n            //     with keyLocaleData as the this value and an argument list\n            //     containing the single item optionsValue is not -1, then\n            if (indexOf.call(keyLocaleData, optionsValue) !== -1) {\n                // 1. If optionsValue is not equal to value, then\n                if (optionsValue !== value) {\n                    // a. Let value be optionsValue.\n                    value = optionsValue;\n                    // b. Let supportedExtensionAddition be \"\".\n                    supportedExtensionAddition = '';\n                }\n            }\n        }\n        // i. Set result.[[<key>]] to value.\n        result['[[' + key + ']]'] = value;\n\n        // j. Append supportedExtensionAddition to supportedExtension.\n        supportedExtension += supportedExtensionAddition;\n\n        // k. Increase i by 1.\n        i++;\n    }\n    // 12. If the length of supportedExtension is greater than 2, then\n    if (supportedExtension.length > 2) {\n        // a.\n        let privateIndex = foundLocale.indexOf(\"-x-\");\n        // b.\n        if (privateIndex === -1) {\n            // i.\n            foundLocale = foundLocale + supportedExtension;\n        }\n        // c.\n        else {\n            // i.\n            let preExtension = foundLocale.substring(0, privateIndex);\n            // ii.\n            let postExtension = foundLocale.substring(privateIndex);\n            // iii.\n            foundLocale = preExtension + supportedExtension + postExtension;\n        }\n        // d. asserting - skipping\n        // e.\n        foundLocale = CanonicalizeLanguageTag(foundLocale);\n    }\n    // 13. Set result.[[locale]] to foundLocale.\n    result['[[locale]]'] = foundLocale;\n\n    // 14. Return result.\n    return result;\n}\n\n/**\n * The LookupSupportedLocales abstract operation returns the subset of the\n * provided BCP 47 language priority list requestedLocales for which\n * availableLocales has a matching locale when using the BCP 47 Lookup algorithm.\n * Locales appear in the same order in the returned list as in requestedLocales.\n * The following steps are taken:\n */\nexport function /* 9.2.6 */LookupSupportedLocales (availableLocales, requestedLocales) {\n    // 1. Let len be the number of elements in requestedLocales.\n    let len = requestedLocales.length;\n    // 2. Let subset be a new empty List.\n    let subset = new List();\n    // 3. Let k be 0.\n    let k = 0;\n\n    // 4. Repeat while k < len\n    while (k < len) {\n        // a. Let locale be the element of requestedLocales at 0-origined list\n        //    position k.\n        let locale = requestedLocales[k];\n        // b. Let noExtensionsLocale be the String value that is locale with all\n        //    Unicode locale extension sequences removed.\n        let noExtensionsLocale = String(locale).replace(expUnicodeExSeq, '');\n        // c. Let availableLocale be the result of calling the\n        //    BestAvailableLocale abstract operation (defined in 9.2.2) with\n        //    arguments availableLocales and noExtensionsLocale.\n        let availableLocale = BestAvailableLocale(availableLocales, noExtensionsLocale);\n\n        // d. If availableLocale is not undefined, then append locale to the end of\n        //    subset.\n        if (availableLocale !== undefined)\n            arrPush.call(subset, locale);\n\n        // e. Increment k by 1.\n        k++;\n    }\n\n    // 5. Let subsetArray be a new Array object whose elements are the same\n    //    values in the same order as the elements of subset.\n    let subsetArray = arrSlice.call(subset);\n\n    // 6. Return subsetArray.\n    return subsetArray;\n}\n\n/**\n * The BestFitSupportedLocales abstract operation returns the subset of the\n * provided BCP 47 language priority list requestedLocales for which\n * availableLocales has a matching locale when using the Best Fit Matcher\n * algorithm. Locales appear in the same order in the returned list as in\n * requestedLocales. The steps taken are implementation dependent.\n */\nexport function /*9.2.7 */BestFitSupportedLocales (availableLocales, requestedLocales) {\n    // ###TODO: implement this function as described by the specification###\n    return LookupSupportedLocales(availableLocales, requestedLocales);\n}\n\n/**\n * The SupportedLocales abstract operation returns the subset of the provided BCP\n * 47 language priority list requestedLocales for which availableLocales has a\n * matching locale. Two algorithms are available to match the locales: the Lookup\n * algorithm described in RFC 4647 section 3.4, and an implementation dependent\n * best-fit algorithm. Locales appear in the same order in the returned list as\n * in requestedLocales. The following steps are taken:\n */\nexport function /*9.2.8 */SupportedLocales (availableLocales, requestedLocales, options) {\n    let matcher, subset;\n\n    // 1. If options is not undefined, then\n    if (options !== undefined) {\n        // a. Let options be ToObject(options).\n        options = new Record(toObject(options));\n        // b. Let matcher be the result of calling the [[Get]] internal method of\n        //    options with argument \"localeMatcher\".\n        matcher = options.localeMatcher;\n\n        // c. If matcher is not undefined, then\n        if (matcher !== undefined) {\n            // i. Let matcher be ToString(matcher).\n            matcher = String(matcher);\n\n            // ii. If matcher is not \"lookup\" or \"best fit\", then throw a RangeError\n            //     exception.\n            if (matcher !== 'lookup' && matcher !== 'best fit')\n                throw new RangeError('matcher should be \"lookup\" or \"best fit\"');\n        }\n    }\n    // 2. If matcher is undefined or \"best fit\", then\n    if (matcher === undefined || matcher === 'best fit')\n        // a. Let subset be the result of calling the BestFitSupportedLocales\n        //    abstract operation (defined in 9.2.7) with arguments\n        //    availableLocales and requestedLocales.\n        subset = BestFitSupportedLocales(availableLocales, requestedLocales);\n    // 3. Else\n    else\n        // a. Let subset be the result o