[javascript] Get LatLng from Zip Code - Google Maps API

All I want is some simple example code that shows me how to obtain a latlng element from an inputted zip code OR a city/state.

This is just an improvement to the previous answers because it didn't work for me with some zipcodes even when in https://www.google.com/maps it does, I fixed just adding the word "zipcode " before to put the zipcode, like this:

function getLatLngByZipcode(zipcode) _x000D_
{_x000D_
    var geocoder = new google.maps.Geocoder();_x000D_
    var address = zipcode;_x000D_
    geocoder.geocode({ 'address': 'zipcode '+address }, function (results, status) {_x000D_
        if (status == google.maps.GeocoderStatus.OK) {_x000D_
            var latitude = results[0].geometry.location.lat();_x000D_
            var longitude = results[0].geometry.location.lng();_x000D_
            alert("Latitude: " + latitude + "\nLongitude: " + longitude);_x000D_
        } else {_x000D_
            alert("Request failed.")_x000D_
        }_x000D_
    });_x000D_
    return [latitude, longitude];_x000D_
}

<script src="https://maps.googleapis.com/maps/api/js?key=API_KEY"></script>
<script>
    var latitude = '';
    var longitude = '';

    var geocoder = new google.maps.Geocoder();
    geocoder.geocode(
    { 
       componentRestrictions: { 
           country: 'IN', 
           postalCode: '744102'
       } 
    }, function (results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
            latitude = results[0].geometry.location.lat();
            longitude = results[0].geometry.location.lng();
            console.log(latitude + ", " + longitude);
        } else {
            alert("Request failed.")
        }
    });
</script>

https://developers.google.com/maps/documentation/javascript/geocoding#ComponentFiltering

Just a hint: zip codes are not worldwide unique so this is worth to provide country ISO code in the request (https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2).

e.g looking for coordinates of polish (iso code PL) zipcode 01-210:

https://maps.googleapis.com/maps/api/geocode/json?address=01210,PL

how to obtain user country code?

if you would like to get your user country info based on IP address there are services for it, e.g you can do GET request on: http://ip-api.com/json

While working on my internship project I found a website for this https://thezipcodes.com/ Create a free account and get the API key from account Section.

https://thezipcodes.com/api/v1/search?zipCode={zipCode}&countryCode={2digitCountryCode}&apiKey={apiKey}

I found majority of data here.

Here is the function I am using for my work

function getLatLngByZipcode(zipcode) 
{
    var geocoder = new google.maps.Geocoder();
    var address = zipcode;
    geocoder.geocode({ 'address': address }, function (results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
            var latitude = results[0].geometry.location.lat();
            var longitude = results[0].geometry.location.lng();
            alert("Latitude: " + latitude + "\nLongitude: " + longitude);
        } else {
            alert("Request failed.")
        }
    });
    return [latitude, longitude];
}

Here is the most reliable way to get the lat/long from zip code (i.e. postal code):

https://maps.googleapis.com/maps/api/geocode/json?key=YOUR_API_KEY&components=postal_code:97403