javascript - 如何将变量(laravel)传递给javascript？

Question

因此，我需要将 Laravel 中的两个变量( $event->latitude 和 $event->longitude )传递给 Javascript，因为我需要使用这些值Google map 。这些是 2 个值，例如...纬度:44.4590762 和经度:26.0967384000000。

所以，我试图做的......

var mylat = {!! json_encode($event->latitude->toArray()) !!};
var mylng = {!! json_encode($event->longitude->toArray()) !!};

or 

var mylat = {!! $event->latitude !!}
var mylng = {!! $event->longitude !!}

但没有结果。我的变量仍然没有值。

这是我的事件 Controller :

$event->longitude = $request['longitude'];
$event->latitude = $request['latitude'];

我的看法:

<div id="map"></div>

我的脚本:

<script>
    var mylat = {!! json_encode($event->latitude->toArray()) !!};
    var mylng = {!! json_encode($event->longitude->toArray()) !!};


function initMap() {
    var map = new google.maps.Map(document.getElementById('map'), {
      center: {lat: mylat, lng: mylng},
      zoom: 18
    });
    var input = document.getElementById('searchInput');
    map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);

    var autocomplete = new google.maps.places.Autocomplete(input);
    autocomplete.bindTo('bounds', map);

    var infowindow = new google.maps.InfoWindow();
    var marker = new google.maps.Marker({
        map: map,
        anchorPoint: new google.maps.Point(0, -29)
    });

    autocomplete.addListener('place_changed', function() {
        infowindow.close();
        marker.setVisible(false);
        var place = autocomplete.getPlace();
        if (!place.geometry) {
            window.alert("Autocomplete's returned place contains no geometry");
            return;
        }

        // If the place has a geometry, then present it on a map.
        if (place.geometry.viewport) {
            map.fitBounds(place.geometry.viewport);
        } else {
            map.setCenter(place.geometry.location);
            map.setZoom(17);
        }
        marker.setIcon(({
            url: place.icon,
            size: new google.maps.Size(71, 71),
            origin: new google.maps.Point(0, 0),
            anchor: new google.maps.Point(17, 34),
            scaledSize: new google.maps.Size(35, 35)
        }));
        marker.setPosition(place.geometry.location);
        marker.setVisible(true);

        var address = '';
        if (place.address_components) {
            address = [
              (place.address_components[0] && place.address_components[0].short_name || ''),
              (place.address_components[1] && place.address_components[1].short_name || ''),
              (place.address_components[2] && place.address_components[2].short_name || '')
            ].join(' ');
        }

        infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
        infowindow.open(map, marker);

        //Location details
        for (var i = 0; i < place.address_components.length; i++) {
            if(place.address_components[i].types[0] == 'postal_code'){
                document.getElementById('postal_code').innerHTML = place.address_components[i].long_name;
            }
            if(place.address_components[i].types[0] == 'country'){
                document.getElementById('country').innerHTML = place.address_components[i].long_name;
            }
        }
        document.getElementById('location').innerHTML = place.formatted_address;
        document.getElementById('lat').innerHTML = place.geometry.location.lat();
        document.getElementById('lon').innerHTML = place.geometry.location.lng();
        document.getElementById('location').innerHTML = place.geometry.location.location();
    });
}
</script>

Answer 1

将 $event 存储在 JavaScript 变量中并使用它。