PREFILL ADDRESS OR STREET USING GOOGLE API

iForm-Page-JavaScript-Location.js

function getStreetNumber(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);

	try { return obj.results[0].address_components[0].short_name; }
	catch(e) { return ''; }

}
function getStreetName(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);  

	try { return obj.results[0].address_components[1].short_name; }
	catch(e) { return ''; }
}
function getCity(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);
	
	try { return obj.results[0].address_components[2].short_name; }
	catch(e) { return ''; }
}

function getState(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);
	
	try { return obj.results[0].address_components[5].short_name; }
	catch(e) { return ''; }
}

function getZip(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);  
	
	try { return obj.results[0].address_components[7].short_name; }
	catch(e) { return ''; }
}

function getRGeocodeJSON(lat, lng) {
	var url = "https://maps.googleapis.com/maps/api/geocode/json?latlng=" + lat + "," + lng + "&[API KEY]";
	var resp ;
	var xmlHttp ;
    resp  = '' ;
    xmlHttp = new XMLHttpRequest();

    if(xmlHttp != null)
    {
        xmlHttp.open( "GET", url, false );
        xmlHttp.send( null );
        resp = xmlHttp.responseText;
    }

    return resp ;
}

function getEverything(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);  
	
	var address_components =JSON.stringify( obj.results[0].address_components);
	return address_components;
}

function getFormattedAddress(lat, lng) {
	var json = getRGeocodeJSON(lat, lng);
	var obj = JSON.parse(json);

	try { return obj.results[0].formatted_address; }
	catch(e) { return ''; }

}

Code sample for this example:
https://iformbuilder.zendesk.com/hc/en-us/community/posts/201465644-Prefill-Address-or-Street-using-Google-API

Updated with some try/catch to return blank strings if the index doesn't exist. This way the entire field in iForm doesn't just blank out.