我是第一次尝试在这里整合一些Javascript，所以我们非常感谢任何能帮助我理解问题的资源。

我正在尝试从以下请求中提取lat和long，以便在另一个请求中使用:

var placeSearch, autocomplete;
var x = document.getElementById("location");

function initAutocomplete() {
    // Create the autocomplete object, restricting the search predictions to
    // geographical location types.
    autocomplete = new google.maps.places.Autocomplete(
        document.getElementById('autocomplete'), { types: ['geocode'] });

    // Avoid paying for data that you don't need by restricting the set of
    // place fields that are returned to just the address components.
    autocomplete.setFields(['geometry']);


}

function showPosition() {
    x.innerHTML = "Latitude: " + autocomplete.result.geometry.lat +
        "<br>Longitude: " + autocomplete.result.geometry.lng;
}
/*
    "result" : {
       "geometry" : {
          "location" : {
             "lat" : 51.46588129999999,
             "lng" : -0.1413263
        }
}
*/


// Bias the autocomplete object to the user's geographical location,
// as supplied by the browser's 'navigator.geolocation' object.
function geolocate() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(function (position) {
            var geolocation = {
                lat: position.coords.latitude,
                lng: position.coords.longitude
            };
            var circle = new google.maps.Circle(
                { center: geolocation, radius: position.coords.accuracy });
            autocomplete.setBounds(circle.getBounds());
        });
    }
}

显然，autocomplete.result.geometry.lat返回一个location_search.js:18 uncapted typeerror:无法读取undefined错误的属性“geometry”，因此这里我缺少了一些知识。

谢谢你的帮助。