无法读取未定义的属性“__e3_”

Posted 2023-05-08

【中文标题】无法读取未定义的属性“__e3_”

【英文标题】：Cannot read property '__e3_' of undefined

【发布时间】：2017-02-19 19:56:24

【问题描述】：

已经看到了一些这样的错误，但在查看了答案后，我还没有找到适用于这里的解决方案。一切似乎都可以正常工作，直到我添加 eventListener for 'click' 以打开 infoWindow，此时我在控制台中收到以下错误：

关于是什么导致此错误的任何想法？

请注意，我在使用 Google 地图方面远非专家，因此请记住这一点：)

<div class="acf-map c-location-map" style="width: 100%; height: 700px;">
    <?php 

        // Get a list of all offices, we need their IDs to get their locations for use with the Google map.
        $stockistList = get_posts(array(
            'posts_per_page'    => -1,
            'post_type'         => 'stockist',
        ));

        if (!empty($stockistList))          
        
            foreach ($stockistList as $singleStockist)
            
                // Create a simple div that shows the map working correctly.
                printf('<div class="c-location-map__marker marker" data-country="%s">
                            <h4>%s</h4>
                        </div>', 
                        get_field('stockist_country', $singleStockist->ID),
                        $singleStockist->post_title
                    );
            
        
    ?>
<!-- .c-location-map --></div>

<script type="text/javascript">
(function($) 

/**
 * Creates a new Google Map using the markers on the page. 
 */
function ts_newMap($el) 
   
    var $markers = $el.find('.marker');

    // Settings
    var args = 
        zoom                : 3,
        center              : new google.maps.LatLng(0, 0),
        mapTypeId           : google.maps.MapTypeId.ROADMAP,
        scrollwheel         : false,
        styles              : ["featureType":"all","elementType":"all","stylers":["visibility":"simplified"],"featureType":"all","elementType":"geometry","stylers":["color":"#0025f0"],"featureType":"all","elementType":"geometry.fill","stylers":["visibility":"simplified","color":"#2d3a6d"],"featureType":"all","elementType":"labels","stylers":["visibility":"off"],"featureType":"all","elementType":"labels.text.fill","stylers":["gamma":0.01,"lightness":20],"featureType":"all","elementType":"labels.text.stroke","stylers":["saturation":-31,"lightness":-33,"weight":2,"gamma":0.8],"featureType":"all","elementType":"labels.icon","stylers":["visibility":"off"],"featureType":"administrative.country","elementType":"labels","stylers":["visibility":"off"],"featureType":"administrative.province","elementType":"labels","stylers":["visibility":"off"],"featureType":"administrative.locality","elementType":"labels","stylers":["visibility":"off"],"featureType":"administrative.neighborhood","elementType":"labels","stylers":["visibility":"off"],"featureType":"administrative.land_parcel","elementType":"labels","stylers":["visibility":"off"],"featureType":"landscape","elementType":"geometry","stylers":["lightness":30,"saturation":30,"visibility":"simplified","color":"#636363"],"featureType":"landscape","elementType":"labels","stylers":["visibility":"off"],"featureType":"poi","elementType":"all","stylers":["color":"#636363"],"featureType":"poi","elementType":"geometry","stylers":["saturation":20],"featureType":"poi","elementType":"labels","stylers":["visibility":"off"],"featureType":"poi.park","elementType":"geometry","stylers":["lightness":20,"saturation":-20],"featureType":"road","elementType":"all","stylers":["visibility":"simplified","color":"#636363"],"featureType":"road","elementType":"geometry","stylers":["lightness":10,"saturation":-30],"featureType":"road","elementType":"geometry.stroke","stylers":["saturation":25,"lightness":25],"featureType":"road","elementType":"labels","stylers":["visibility":"off"],"featureType":"transit","elementType":"all","stylers":["visibility":"simplified","color":"#636363"],"featureType":"transit","elementType":"labels","stylers":["visibility":"off"],"featureType":"water","elementType":"all","stylers":["lightness":-20,"visibility":"simplified","color":"#efefed"],"featureType":"water","elementType":"labels","stylers":["visibility":"off"]]
    ;

    // create map               
    var map = new google.maps.Map( $el[0], args);

    // add a markers reference
    map.markers = [];   

    // add markers
    $markers.each(function()   
        ts_newMapMarker($(this), map);      
    );

    // Centre the map based on what pins have been added.
    ts_mapCentre(map);

    // return
    return map;


/**
 * Adds an individual marker to the map.
 */
function ts_newMapMarker($marker, map)


    var marker;

    var dataCountry = $marker.attr('data-country');
    console.log("Country: " + dataCountry);

    geocoder = new google.maps.Geocoder();
    function getCountry(country) 
        geocoder.geocode(  'address': country , function(results, status) 
            if (status == google.maps.GeocoderStatus.OK) 
                map.setCenter(results[0].geometry.location);
                marker = new google.maps.Marker(
                    map: map,
                    position: results[0].geometry.location,
                    icon    : '<?php bloginfo('template_url'); ?>/assets/images/map-marker.png'
                );
             else 
                alert("Geocode was not successful for the following reason: " + status);
            
        );
    

    map.markers.push( marker );

    getCountry(dataCountry);

    // if marker contains html, add it to an infoWindow
    if($marker.html())
    
        // create info window
        var infowindow = new google.maps.InfoWindow(
            content     : $marker.html()
        );

        // show info window when marker is clicked
        google.maps.event.addListener(marker, 'click', function() 
            console.log("open info window");
            infowindow.open( map, marker );
        );
    



/**
 *  Centres the map based on what's been added to it.
 */
function ts_mapCentre(map)

    // vars
    var bounds = new google.maps.LatLngBounds();

    // loop through all markers and create bounds
    $.each( map.markers, function(i, marker)
    
        var latlng = new google.maps.LatLng(marker.position.lat(), marker.position.lng());
        bounds.extend( latlng );
    );

    // only 1 marker?
    if( map.markers.length == 1 )
    
        // set center of map
        map.setCenter(bounds.getCenter());
        map.setZoom(8);
    
    else 
        // fit to bounds
        map.fitBounds(bounds);
    



/**
 *  Build the map now the page is ready.
 */
var map = null;
$(document).ready(function()

    $('.acf-map').each(function()
    
        // create map
        map = ts_newMap($(this));
    );
);

)(jQuery);
</script>

【问题讨论】：

Google maps API: Cannot read property '__e3_' of undefined的可能重复

@RaxWeber 看不出这是怎么复制的。如前所述，在添加点击事件侦听器之前一切似乎都正常（即所有标记都正确显示），据我所知，它正在正确初始化。

【参考方案1】：

电话

geocoder.geocode(  'address': country , function(results, status)  ..

是异步的，意思是一行

google.maps.event.addListener(marker, 'click', function() 

将在行前调用

marker = new google.maps.Marker( ..

在您的ts_newMapMarker 中调用。因此，marker 在您要为其添加事件侦听器的位置不存在。你必须以某种方式重新安排你的代码，所以你在标记初始化后添加监听器，例如：

function ts_newMapMarker($marker, map)


    var marker;

    var dataCountry = $marker.attr('data-country');
    console.log("Country: " + dataCountry);

    geocoder = new google.maps.Geocoder();
    function getCountry(country) 
        geocoder.geocode(  'address': country , function(results, status) 
            if (status == google.maps.GeocoderStatus.OK) 
                map.setCenter(results[0].geometry.location);
                marker = new google.maps.Marker(
                    map: map,
                    position: results[0].geometry.location,
                    icon    : '<?php bloginfo('template_url'); ?>/assets/images/map-marker.png'
                );

                map.markers.push( marker );

                getCountry(dataCountry);

                // if marker contains HTML, add it to an infoWindow
                if($marker.html())
                
                    // create info window
                    var infowindow = new google.maps.InfoWindow(
                        content     : $marker.html()
                    );

                    // show info window when marker is clicked
                    google.maps.event.addListener(marker, 'click', function() 
                        console.log("open info window");
                        infowindow.open( map, marker );
                    );
                
             else 
                alert("Geocode was not successful for the following reason: " + status);
            
        );
    

【讨论】：

啊，我明白了——现在一切正常。谢谢你的解释。

【参考方案2】：

就我而言 google.maps.event.addListener(marker, 'click', function() 标记变量未定义。因此错误。可能对某人有用。

【讨论】：

谢谢，在我的情况下与未定义的地图变量相同。