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calebgrove/stateToAbbr.js

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Convert state name to abbreviation in JavaScript. There's some better solutions in the comments, so scroll down!
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stateToAbbr.js
// There's some better solutions in the comments, so scroll down and see how other folks have improved this!
// USAGE:
// abbrState('ny', 'name');
// --> 'New York'
// abbrState('New York', 'abbr');
// --> 'NY'
function abbrState(input, to){
var states = [
['Arizona', 'AZ'],
['Alabama', 'AL'],
['Alaska', 'AK'],
['Arkansas', 'AR'],
['California', 'CA'],
['Colorado', 'CO'],
['Connecticut', 'CT'],
['Delaware', 'DE'],
['Florida', 'FL'],
['Georgia', 'GA'],
['Hawaii', 'HI'],
['Idaho', 'ID'],
['Illinois', 'IL'],
['Indiana', 'IN'],
['Iowa', 'IA'],
['Kansas', 'KS'],
['Kentucky', 'KY'],
['Louisiana', 'LA'],
['Maine', 'ME'],
['Maryland', 'MD'],
['Massachusetts', 'MA'],
['Michigan', 'MI'],
['Minnesota', 'MN'],
['Mississippi', 'MS'],
['Missouri', 'MO'],
['Montana', 'MT'],
['Nebraska', 'NE'],
['Nevada', 'NV'],
['New Hampshire', 'NH'],
['New Jersey', 'NJ'],
['New Mexico', 'NM'],
['New York', 'NY'],
['North Carolina', 'NC'],
['North Dakota', 'ND'],
['Ohio', 'OH'],
['Oklahoma', 'OK'],
['Oregon', 'OR'],
['Pennsylvania', 'PA'],
['Rhode Island', 'RI'],
['South Carolina', 'SC'],
['South Dakota', 'SD'],
['Tennessee', 'TN'],
['Texas', 'TX'],
['Utah', 'UT'],
['Vermont', 'VT'],
['Virginia', 'VA'],
['Washington', 'WA'],
['West Virginia', 'WV'],
['Wisconsin', 'WI'],
['Wyoming', 'WY'],
];
if (to == 'abbr'){
input = input.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
for(i = 0; i < states.length; i++){
if(states[i][0] == input){
return(states[i][1]);
}
}
} else if (to == 'name'){
input = input.toUpperCase();
for(i = 0; i < states.length; i++){
if(states[i][1] == input){
return(states[i][0]);
}
}
}
}
@davidteather
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davidteather commented Mar 23, 2020 •
edited
Loading

Thanks for the previous json object. I've added Samoa, Guam, Northern Mariana Islands, Puerto Rico, U.S. Virgin Islands and U.S. Minor Outlying islands.

function acronymToFullName(acronym) {
  data = {
    AZ: 'Arizona',
    AL: 'Alabama',
    AK: 'Alaska',
    AR: 'Arkansas',
    CA: 'California',
    CO: 'Colorado',
    CT: 'Connecticut',
    DC: 'District of Columbia',
    DE: 'Delaware',
    FL: 'Florida',
    GA: 'Georgia',
    HI: 'Hawaii',
    ID: 'Idaho',
    IL: 'Illinois',
    IN: 'Indiana',
    IA: 'Iowa',
    KS: 'Kansas',
    KY: 'Kentucky',
    LA: 'Louisiana',
    ME: 'Maine',
    MD: 'Maryland',
    MA: 'Massachusetts',
    MI: 'Michigan',
    MN: 'Minnesota',
    MS: 'Mississippi',
    MO: 'Missouri',
    MT: 'Montana',
    NE: 'Nebraska',
    NV: 'Nevada',
    NH: 'New Hampshire',
    NJ: 'New Jersey',
    NM: 'New Mexico',
    NY: 'New York',
    NC: 'North Carolina',
    ND: 'North Dakota',
    OH: 'Ohio',
    OK: 'Oklahoma',
    OR: 'Oregon',
    PA: 'Pennsylvania',
    RI: 'Rhode Island',
    SC: 'South Carolina',
    SD: 'South Dakota',
    TN: 'Tennessee',
    TX: 'Texas',
    UT: 'Utah',
    VT: 'Vermont',
    VA: 'Virginia',
    WA: 'Washington',
    WV: 'West Virginia',
    WI: 'Wisconsin',
    WY: 'Wyoming',
    AS: "American Samoa",
    GU: "Guam",
    MP: "Northern Mariana Islands",
    PR: "Puerto Rico",
    VI: "U.S. Virgin Islands",
    UM: "U.S. Minor Outlying Islands",
  }
  return data[acronym] ?? acronym
}

@nandorojo
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Here's @davidteather's solution in TypeScript:

export default function stateAbbrToName(acronym: string) {
  const states = {
    AZ: 'Arizona',
    AL: 'Alabama',
    AK: 'Alaska',
    AR: 'Arkansas',
    CA: 'California',
    CO: 'Colorado',
    CT: 'Connecticut',
    DC: 'District of Columbia',
    DE: 'Delaware',
    FL: 'Florida',
    GA: 'Georgia',
    HI: 'Hawaii',
    ID: 'Idaho',
    IL: 'Illinois',
    IN: 'Indiana',
    IA: 'Iowa',
    KS: 'Kansas',
    KY: 'Kentucky',
    LA: 'Louisiana',
    ME: 'Maine',
    MD: 'Maryland',
    MA: 'Massachusetts',
    MI: 'Michigan',
    MN: 'Minnesota',
    MS: 'Mississippi',
    MO: 'Missouri',
    MT: 'Montana',
    NE: 'Nebraska',
    NV: 'Nevada',
    NH: 'New Hampshire',
    NJ: 'New Jersey',
    NM: 'New Mexico',
    NY: 'New York',
    NC: 'North Carolina',
    ND: 'North Dakota',
    OH: 'Ohio',
    OK: 'Oklahoma',
    OR: 'Oregon',
    PA: 'Pennsylvania',
    RI: 'Rhode Island',
    SC: 'South Carolina',
    SD: 'South Dakota',
    TN: 'Tennessee',
    TX: 'Texas',
    UT: 'Utah',
    VT: 'Vermont',
    VA: 'Virginia',
    WA: 'Washington',
    WV: 'West Virginia',
    WI: 'Wisconsin',
    WY: 'Wyoming',
    AS: 'American Samoa',
    GU: 'Guam',
    MP: 'Northern Mariana Islands',
    PR: 'Puerto Rico',
    VI: 'U.S. Virgin Islands',
    UM: 'U.S. Minor Outlying Islands',
  }
  return states[acronym] ?? acronym
}

@rinogo
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rinogo commented Mar 4, 2021 •
edited
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Most of these solutions add unnecessary complexity without significant improvement in speed, readability, reliability, or usefulness. @davidteather is on the right track. Here's the "inverse" of his solution, for converting from a state name into an abbreviation. It's simple, fast, and readable.

function stateNameToAbbreviation(name) {
	let states = {
		"arizona": "AZ",
		"alabama": "AL",
		"alaska": "AK",
		"arkansas": "AR",
		"california": "CA",
		"colorado": "CO",
		"connecticut": "CT",
		"district of columbia": "DC",
		"delaware": "DE",
		"florida": "FL",
		"georgia": "GA",
		"hawaii": "HI",
		"idaho": "ID",
		"illinois": "IL",
		"indiana": "IN",
		"iowa": "IA",
		"kansas": "KS",
		"kentucky": "KY",
		"louisiana": "LA",
		"maine": "ME",
		"maryland": "MD",
		"massachusetts": "MA",
		"michigan": "MI",
		"minnesota": "MN",
		"mississippi": "MS",
		"missouri": "MO",
		"montana": "MT",
		"nebraska": "NE",
		"nevada": "NV",
		"new hampshire": "NH",
		"new jersey": "NJ",
		"new mexico": "NM",
		"new york": "NY",
		"north carolina": "NC",
		"north dakota": "ND",
		"ohio": "OH",
		"oklahoma": "OK",
		"oregon": "OR",
		"pennsylvania": "PA",
		"rhode island": "RI",
		"south carolina": "SC",
		"south dakota": "SD",
		"tennessee": "TN",
		"texas": "TX",
		"utah": "UT",
		"vermont": "VT",
		"virginia": "VA",
		"washington": "WA",
		"west virginia": "WV",
		"wisconsin": "WI",
		"wyoming": "WY",
		"american samoa": "AS",
		"guam": "GU",
		"northern mariana islands": "MP",
		"puerto rico": "PR",
		"us virgin islands": "VI",
		"us minor outlying islands": "UM"
	}

	let a = name.trim().replace(/[^\w ]/g, "").toLowerCase(); //Trim, remove all non-word characters with the exception of spaces, and convert to lowercase
	if(states[a] !== null) {
		return states[a];
	}

	return null;
}

@compworkmail
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another ts version:
/**

  • Convert US state abbreviation to full name and vice-versa
  • @param {string} input - input string to convert
    */
    export default function convertUsStateAbbrAndName(input: string): string | null {
    const toAbbr = input.length !== 2;

const states = [
['Alabama', 'AL'],
['Alaska', 'AK'],
['American Samoa', 'AS'],
['Arizona', 'AZ'],
['Arkansas', 'AR'],
['Armed Forces Americas', 'AA'],
['Armed Forces Europe', 'AE'],
['Armed Forces Pacific', 'AP'],
['California', 'CA'],
['Colorado', 'CO'],
['Connecticut', 'CT'],
['Delaware', 'DE'],
['District Of Columbia', 'DC'],
['Florida', 'FL'],
['Georgia', 'GA'],
['Guam', 'GU'],
['Hawaii', 'HI'],
['Idaho', 'ID'],
['Illinois', 'IL'],
['Indiana', 'IN'],
['Iowa', 'IA'],
['Kansas', 'KS'],
['Kentucky', 'KY'],
['Louisiana', 'LA'],
['Maine', 'ME'],
['Marshall Islands', 'MH'],
['Maryland', 'MD'],
['Massachusetts', 'MA'],
['Michigan', 'MI'],
['Minnesota', 'MN'],
['Mississippi', 'MS'],
['Missouri', 'MO'],
['Montana', 'MT'],
['Nebraska', 'NE'],
['Nevada', 'NV'],
['New Hampshire', 'NH'],
['New Jersey', 'NJ'],
['New Mexico', 'NM'],
['New York', 'NY'],
['North Carolina', 'NC'],
['North Dakota', 'ND'],
['Northern Mariana Islands', 'NP'],
['Ohio', 'OH'],
['Oklahoma', 'OK'],
['Oregon', 'OR'],
['Pennsylvania', 'PA'],
['Puerto Rico', 'PR'],
['Rhode Island', 'RI'],
['South Carolina', 'SC'],
['South Dakota', 'SD'],
['Tennessee', 'TN'],
['Texas', 'TX'],
['US Virgin Islands', 'VI'],
['Utah', 'UT'],
['Vermont', 'VT'],
['Virginia', 'VA'],
['Washington', 'WA'],
['West Virginia', 'WV'],
['Wisconsin', 'WI'],
['Wyoming', 'WY'],
];

// So happy that Canada and the US have distinct abbreviations
const provinces = [
['Alberta', 'AB'],
['British Columbia', 'BC'],
['Manitoba', 'MB'],
['New Brunswick', 'NB'],
['Newfoundland', 'NF'],
['Northwest Territory', 'NT'],
['Nova Scotia', 'NS'],
['Nunavut', 'NU'],
['Ontario', 'ON'],
['Prince Edward Island', 'PE'],
['Quebec', 'QC'],
['Saskatchewan', 'SK'],
['Yukon', 'YT'],
];

const regions = states.concat(provinces);

let i; // Reusable loop variable

if (toAbbr) {
input = input.replace(/\w\S*/g, function (txt: string) {
return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
});
for (i = 0; i < regions.length; i++) {
if (regions[i][0] === input) {
return regions[i][1];
}
}
} else {
input = input.toUpperCase();
for (i = 0; i < regions.length; i++) {
if (regions[i][1] === input) {
return regions[i][0];
}
}
}

return null;
}

@ryancraigmartin
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Thanks @davidteather, @nandorojo, @rinogo! Very helpful.

@khitrenovich
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TWIMC - https://www.npmjs.com/package/us-state-converter

@nicholashamilton
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nicholashamilton commented Aug 18, 2022 •
edited
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stateNameToAbbreviation.ts

export default function stateNameToAbbreviation(name: string): string {
    const lowerCaseAbbreviationKey = name.trim().replace(/[^\w ]/g, "").toLowerCase(); // Trim, lowercase and remove all non-word characters with the exception of spaces
    return states[lowerCaseAbbreviationKey] ?? name; // Return name if record is not found
}

const states: Record<string, string> = {
    "arizona": "AZ",
    "alabama": "AL",
    "alaska": "AK",
    "arkansas": "AR",
    "california": "CA",
    "colorado": "CO",
    "connecticut": "CT",
    "district of columbia": "DC",
    "delaware": "DE",
    "florida": "FL",
    "georgia": "GA",
    "hawaii": "HI",
    "idaho": "ID",
    "illinois": "IL",
    "indiana": "IN",
    "iowa": "IA",
    "kansas": "KS",
    "kentucky": "KY",
    "louisiana": "LA",
    "maine": "ME",
    "maryland": "MD",
    "massachusetts": "MA",
    "michigan": "MI",
    "minnesota": "MN",
    "mississippi": "MS",
    "missouri": "MO",
    "montana": "MT",
    "nebraska": "NE",
    "nevada": "NV",
    "new hampshire": "NH",
    "new jersey": "NJ",
    "new mexico": "NM",
    "new york": "NY",
    "north carolina": "NC",
    "north dakota": "ND",
    "ohio": "OH",
    "oklahoma": "OK",
    "oregon": "OR",
    "pennsylvania": "PA",
    "rhode island": "RI",
    "south carolina": "SC",
    "south dakota": "SD",
    "tennessee": "TN",
    "texas": "TX",
    "utah": "UT",
    "vermont": "VT",
    "virginia": "VA",
    "washington": "WA",
    "west virginia": "WV",
    "wisconsin": "WI",
    "wyoming": "WY",
    "american samoa": "AS",
    "guam": "GU",
    "northern mariana islands": "MP",
    "puerto rico": "PR",
    "us virgin islands": "VI",
    "us minor outlying islands": "UM",
};

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