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josephabrahams/where-am-i.html

Last active August 29, 2015 14:17
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Use browser geolocation and the Google Maps API to auto-select your current country from a dropdown menu.
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where-am-i.html
<!DOCTYPE html>
<title>Where am I?</title>
<h1>Where am I?</h1>
<select id="countries" name="countries">
<option selected>----------</option>
<option value="AF">Afghanistan</option>
<option value="AL">Albania</option>
<option value="DZ">Algeria</option>
<option value="AS">American Samoa</option>
<option value="AD">Andorra</option>
<option value="AO">Angola</option>
<option value="AI">Anguilla</option>
<option value="AQ">Antarctica</option>
<option value="AG">Antigua &amp; Barbuda</option>
<option value="AR">Argentina</option>
<option value="AM">Armenia</option>
<option value="AW">Aruba</option>
<option value="AC">Ascension Island</option>
<option value="AU">Australia</option>
<option value="AT">Austria</option>
<option value="AZ">Azerbaijan</option>
<option value="BS">Bahamas</option>
<option value="BH">Bahrain</option>
<option value="BD">Bangladesh</option>
<option value="BB">Barbados</option>
<option value="BY">Belarus</option>
<option value="BE">Belgium</option>
<option value="BZ">Belize</option>
<option value="BJ">Benin</option>
<option value="BM">Bermuda</option>
<option value="BT">Bhutan</option>
<option value="BO">Bolivia</option>
<option value="BA">Bosnia &amp; Herzegovina</option>
<option value="BW">Botswana</option>
<option value="BV">Bouvet Island</option>
<option value="BR">Brazil</option>
<option value="IO">British Indian Ocean Territory</option>
<option value="VG">British Virgin Islands</option>
<option value="BN">Brunei</option>
<option value="BG">Bulgaria</option>
<option value="BF">Burkina Faso</option>
<option value="BI">Burundi</option>
<option value="KH">Cambodia</option>
<option value="CM">Cameroon</option>
<option value="CA">Canada</option>
<option value="IC">Canary Islands</option>
<option value="CV">Cape Verde</option>
<option value="BQ">Caribbean Netherlands</option>
<option value="KY">Cayman Islands</option>
<option value="CF">Central African Republic</option>
<option value="EA">Ceuta &amp; Melilla</option>
<option value="TD">Chad</option>
<option value="CL">Chile</option>
<option value="CN">China</option>
<option value="CX">Christmas Island</option>
<option value="CP">Clipperton Island</option>
<option value="CC">Cocos (Keeling) Islands</option>
<option value="CO">Colombia</option>
<option value="KM">Comoros</option>
<option value="CD">Congo (DRC)</option>
<option value="CG">Congo (Republic)</option>
<option value="CK">Cook Islands</option>
<option value="CR">Costa Rica</option>
<option value="HR">Croatia</option>
<option value="CU">Cuba</option>
<option value="CW">Cur&ccedil;ao</option>
<option value="CY">Cyprus</option>
<option value="CZ">Czech Republic</option>
<option value="CI">C&ocirc;te d&rsquo;Ivoire</option>
<option value="DK">Denmark</option>
<option value="DG">Diego Garcia</option>
<option value="DJ">Djibouti</option>
<option value="DM">Dominica</option>
<option value="DO">Dominican Republic</option>
<option value="EC">Ecuador</option>
<option value="EG">Egypt</option>
<option value="SV">El Salvador</option>
<option value="GQ">Equatorial Guinea</option>
<option value="ER">Eritrea</option>
<option value="EE">Estonia</option>
<option value="ET">Ethiopia</option>
<option value="FK">Falkland Islands (Islas Malvinas)</option>
<option value="FO">Faroe Islands</option>
<option value="FJ">Fiji</option>
<option value="FI">Finland</option>
<option value="FR">France</option>
<option value="GF">French Guiana</option>
<option value="PF">French Polynesia</option>
<option value="TF">French Southern Territories</option>
<option value="GA">Gabon</option>
<option value="GM">Gambia</option>
<option value="GE">Georgia</option>
<option value="DE">Germany</option>
<option value="GH">Ghana</option>
<option value="GI">Gibraltar</option>
<option value="GR">Greece</option>
<option value="GL">Greenland</option>
<option value="GD">Grenada</option>
<option value="GP">Guadeloupe</option>
<option value="GU">Guam</option>
<option value="GT">Guatemala</option>
<option value="GG">Guernsey</option>
<option value="GN">Guinea</option>
<option value="GW">Guinea-Bissau</option>
<option value="GY">Guyana</option>
<option value="HT">Haiti</option>
<option value="HM">Heard &amp; McDonald Islands</option>
<option value="HN">Honduras</option>
<option value="HK">Hong Kong</option>
<option value="HU">Hungary</option>
<option value="IS">Iceland</option>
<option value="IN">India</option>
<option value="ID">Indonesia</option>
<option value="IR">Iran</option>
<option value="IQ">Iraq</option>
<option value="IE">Ireland</option>
<option value="IM">Isle of Man</option>
<option value="IL">Israel</option>
<option value="IT">Italy</option>
<option value="JM">Jamaica</option>
<option value="JP">Japan</option>
<option value="JE">Jersey</option>
<option value="JO">Jordan</option>
<option value="KZ">Kazakhstan</option>
<option value="KE">Kenya</option>
<option value="KI">Kiribati</option>
<option value="XK">Kosovo</option>
<option value="KW">Kuwait</option>
<option value="KG">Kyrgyzstan</option>
<option value="LA">Laos</option>
<option value="LV">Latvia</option>
<option value="LB">Lebanon</option>
<option value="LS">Lesotho</option>
<option value="LR">Liberia</option>
<option value="LY">Libya</option>
<option value="LI">Liechtenstein</option>
<option value="LT">Lithuania</option>
<option value="LU">Luxembourg</option>
<option value="MO">Macau</option>
<option value="MK">Macedonia (FYROM)</option>
<option value="MG">Madagascar</option>
<option value="MW">Malawi</option>
<option value="MY">Malaysia</option>
<option value="MV">Maldives</option>
<option value="ML">Mali</option>
<option value="MT">Malta</option>
<option value="MH">Marshall Islands</option>
<option value="MQ">Martinique</option>
<option value="MR">Mauritania</option>
<option value="MU">Mauritius</option>
<option value="YT">Mayotte</option>
<option value="MX">Mexico</option>
<option value="FM">Micronesia</option>
<option value="MD">Moldova</option>
<option value="MC">Monaco</option>
<option value="MN">Mongolia</option>
<option value="ME">Montenegro</option>
<option value="MS">Montserrat</option>
<option value="MA">Morocco</option>
<option value="MZ">Mozambique</option>
<option value="MM">Myanmar (Burma)</option>
<option value="NA">Namibia</option>
<option value="NR">Nauru</option>
<option value="NP">Nepal</option>
<option value="NL">Netherlands</option>
<option value="NC">New Caledonia</option>
<option value="NZ">New Zealand</option>
<option value="NI">Nicaragua</option>
<option value="NE">Niger</option>
<option value="NG">Nigeria</option>
<option value="NU">Niue</option>
<option value="NF">Norfolk Island</option>
<option value="KP">North Korea</option>
<option value="MP">Northern Mariana Islands</option>
<option value="NO">Norway</option>
<option value="OM">Oman</option>
<option value="PK">Pakistan</option>
<option value="PW">Palau</option>
<option value="PS">Palestine</option>
<option value="PA">Panama</option>
<option value="PG">Papua New Guinea</option>
<option value="PY">Paraguay</option>
<option value="PE">Peru</option>
<option value="PH">Philippines</option>
<option value="PN">Pitcairn Islands</option>
<option value="PL">Poland</option>
<option value="PT">Portugal</option>
<option value="PR">Puerto Rico</option>
<option value="QA">Qatar</option>
<option value="RO">Romania</option>
<option value="RU">Russia</option>
<option value="RW">Rwanda</option>
<option value="RE">R&eacute;union</option>
<option value="WS">Samoa</option>
<option value="SM">San Marino</option>
<option value="SA">Saudi Arabia</option>
<option value="SN">Senegal</option>
<option value="RS">Serbia</option>
<option value="SC">Seychelles</option>
<option value="SL">Sierra Leone</option>
<option value="SG">Singapore</option>
<option value="SX">Sint Maarten</option>
<option value="SK">Slovakia</option>
<option value="SI">Slovenia</option>
<option value="SB">Solomon Islands</option>
<option value="SO">Somalia</option>
<option value="ZA">South Africa</option>
<option value="GS">South Georgia &amp; South Sandwich Islands</option>
<option value="KR">South Korea</option>
<option value="SS">South Sudan</option>
<option value="ES">Spain</option>
<option value="LK">Sri Lanka</option>
<option value="BL">St. Barth&eacute;lemy</option>
<option value="SH">St. Helena</option>
<option value="KN">St. Kitts &amp; Nevis</option>
<option value="LC">St. Lucia</option>
<option value="MF">St. Martin</option>
<option value="PM">St. Pierre &amp; Miquelon</option>
<option value="VC">St. Vincent &amp; Grenadines</option>
<option value="SD">Sudan</option>
<option value="SR">Suriname</option>
<option value="SJ">Svalbard &amp; Jan Mayen</option>
<option value="SZ">Swaziland</option>
<option value="SE">Sweden</option>
<option value="CH">Switzerland</option>
<option value="SY">Syria</option>
<option value="ST">S&atilde;o Tom&eacute; &amp; Pr&iacute;ncipe</option>
<option value="TW">Taiwan</option>
<option value="TJ">Tajikistan</option>
<option value="TZ">Tanzania</option>
<option value="TH">Thailand</option>
<option value="TL">Timor-Leste</option>
<option value="TG">Togo</option>
<option value="TK">Tokelau</option>
<option value="TO">Tonga</option>
<option value="TT">Trinidad &amp; Tobago</option>
<option value="TA">Tristan da Cunha</option>
<option value="TN">Tunisia</option>
<option value="TR">Turkey</option>
<option value="TM">Turkmenistan</option>
<option value="TC">Turks &amp; Caicos Islands</option>
<option value="TV">Tuvalu</option>
<option value="UM">U.S. Outlying Islands</option>
<option value="VI">U.S. Virgin Islands</option>
<option value="UG">Uganda</option>
<option value="UA">Ukraine</option>
<option value="AE">United Arab Emirates</option>
<option value="US">United States</option>
<option value="GB">United Kingdom</option>
<option value="UY">Uruguay</option>
<option value="UZ">Uzbekistan</option>
<option value="VU">Vanuatu</option>
<option value="VA">Vatican City</option>
<option value="VE">Venezuela</option>
<option value="VN">Vietnam</option>
<option value="WF">Wallis &amp; Futuna</option>
<option value="EH">Western Sahara</option>
<option value="YE">Yemen</option>
<option value="ZM">Zambia</option>
<option value="ZW">Zimbabwe</option>
<option value="AX">&Aring;land Islands</option>
</select>
<script>
(function() {
'use strict';
// jshint -W106
var countries = document.getElementById('countries');
// check if geolocation is available
// if so run getCountry
function whereAmI() {
if ('geolocation' in navigator) { // see Modernizr.geolocation
navigator.geolocation.getCurrentPosition(getCountry, function() {
console.log('Error getting geolocation.');
});
} else {
console.log('Geolocation not available.');
}
}
// make request to Google Maps API with current location
// select country in dropdown if found
function getCountry(position) {
var lat = position.coords.latitude;
var lng = position.coords.longitude;
var requestUrl = '//maps.googleapis.com/maps/api/geocode/json?latlng=' + lat + ',' + lng;
var request = new XMLHttpRequest();
request.open('GET', requestUrl, true);
request.onload = function() {
if (request.status >= 200 && request.status < 400) {
// Success!
var data;
// make sure response is valid JSON
try {
data = JSON.parse(request.responseText);
} catch(e) {
console.log('Error parsing response.');
console.log(e);
return;
}
if (data.status === 'OK') {
// get first result
var result = data.results.slice(-1).pop();
// get country name and code
var country = findCountryName(result.address_components);
// set country code in dropdown
if (country) {
// console.log(country);
selectCountry(country.code);
} else {
console.log('Country not found in result.');
}
// } else if (data.status === 'ZERO_RESULTS') {
// console.log('No results found.');
} else if ('error_message' in data) {
console.log(data.error_message);
} else {
console.log('Error: ' + data.status);
}
} else {
console.log('We reached our target server, but it returned an error.');
}
};
request.onerror = function() {
console.log('There was a connection error of some sort.');
};
request.send();
}
// parse address_components in Google Maps response
// address_components are ordered most to least specific
// searching backwards finds country faster
function findCountryName(addressComponents) {
for (var i = addressComponents.length - 1; i >= 0; i--) {
if (addressComponents[i].types[0] === 'country') {
return {
// jshint -W106
code: addressComponents[i].short_name,
name: addressComponents[i].long_name
};
}
}
return false;
}
// loop thru all options in dropdown and set
// to country if country code matches value
function selectCountry(countryCode) {
for (var i = 0; i < countries.length; i++) {
if (countries[i].value === countryCode) {
countries[i].selected = true;
return;
}
}
console.log('Country code not found in list');
}
whereAmI();
})();
</script>
@josephabrahams
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https://developers.google.com/maps/coverage

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