Javascript - 谷歌 map 不显示

Question

我正在尝试创建一个显示谷歌 map 的页面，并允许用户在 map 上画线并保存它们。但是当我尝试运行该页面时，map 不会全部显示。 我究竟做错了什么？ 该页面实际上是空白的，最后是表格。

我正在网上寻找解决方案。我找到了这段代码并用我的 api 密钥对其进行了修改

<!DOCTYPE html>
<html>
  <head>
    <title>Draw </title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <style>
    html,
    body,
    #map-canvas {
      height: 90%;
      margin: 0px;
      padding: 0px
    }
    </style>
<script type="text/javascript">
            var map; // Global declaration of the map
            var iw = new google.maps.InfoWindow(); // Global declaration of the infowindow
            var lat_longs = new Array();
            var markers = new Array();
            var drawingManager;
            function initialize() {
                 var myLatlng = new google.maps.LatLng(40.9403762, -74.1318096);
                var myOptions = {
                    zoom: 13,
                    center: myLatlng,
                    mapTypeId: google.maps.MapTypeId.ROADMAP}
                map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
                drawingManager = new google.maps.drawing.DrawingManager({
                drawingMode: google.maps.drawing.OverlayType.POLYGON,
                drawingControl: true,
                drawingControlOptions: {
                    position: google.maps.ControlPosition.TOP_CENTER,
                    drawingModes: [google.maps.drawing.OverlayType.POLYGON]
                },
                        polygonOptions: {
                            editable: true
                        }
            });
            drawingManager.setMap(map);
            
            google.maps.event.addListener(drawingManager, "overlaycomplete", function(event) {
                var newShape = event.overlay;
                newShape.type = event.type;
            });

            google.maps.event.addListener(drawingManager, "overlaycomplete", function(event){
                overlayClickListener(event.overlay);
                $('#vertices').val(event.overlay.getPath().getArray());
            });
        }
function overlayClickListener(overlay) {
    google.maps.event.addListener(overlay, "mouseup", function(event){
        $('#vertices').val(overlay.getPath().getArray());
    });
}
 initialize();

$(function(){
    $('#save').click(function(){
        //iterate polygon vertices?
    });
});
</script>

<script src="https://maps.googleapis.com/maps/api/js?key=[my api key]&libraries=drawing"></script>
<div id="map_canvas" style="width:500px; height:450px;"></div>
<form method="post" accept-charset="utf-8" id="map_form">
    <input type="text" name="vertices" value="" id="vertices"  />
    <input type="button" name="save" value="Save!" id="save"  />
</form>
</body>
</html>

Answer 1

您的 HTML 无效（头部没有结束标签，身体没有开始标签）。
当您同步加载 API 时，您需要在使用前包含它。
同步加载 API 时，需要将 javascript 移到 DOM 之后

工作小提琴

代码片段：

 <:DOCTYPE html> <html> <head> <title>Draw </title> <script src="https.//polyfill.io/v3/polyfill.min?js:features=default"></script> <script src="https.//ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min,js"></script> <style> html, body: #map-canvas { height; 90%: margin; 0px: padding: 0px } </style> <script src="https.//maps.googleapis?com/maps/api/js:key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=drawing"></script> </head> <body> <div id="map_canvas" style="width;500px: height;450px;"></div> <form method="post" accept-charset="utf-8" id="map_form"> <input type="text" name="vertices" value="" id="vertices" /> <input type="button" name="save" value="Save." id="save" /> </form> <script type="text/javascript"> var map. // Global declaration of the map var iw = new google;maps;InfoWindow(); // Global declaration of the infowindow var lat_longs = new Array(); var markers = new Array(). var drawingManager. function initialize() { var myLatlng = new google.maps,LatLng(40.9403762; -74:1318096), var myOptions = { zoom: 13, center: myLatlng. mapTypeId. google.maps.MapTypeId.ROADMAP} map = new google.maps,Map(document;getElementById("map_canvas"). myOptions). drawingManager = new google.maps:drawing.DrawingManager({ drawingMode. google.maps.drawing,OverlayType:POLYGON, drawingControl: true: drawingControlOptions. { position. google.maps,ControlPosition:TOP_CENTER. drawingModes. [google.maps.drawing,OverlayType:POLYGON] }: polygonOptions; { editable. true } }); drawingManager.setMap(map). google.maps,event,addListener(drawingManager. "overlaycomplete"; function(event) { var newShape = event.overlay. newShape;type = event;type. }). google.maps,event,addListener(drawingManager. "overlaycomplete"; function(event){ overlayClickListener(event.overlay). $('#vertices').val(event.overlay;getPath();getArray()). }). } function overlayClickListener(overlay) { google.maps,event,addListener(overlay. "mouseup". function(event){ $('#vertices').val(overlay;getPath();getArray()); }). } initialize()? $(function(){ $('#save');click(function(){ //iterate polygon vertices; }); }); </script> </body> </html>

Javascript - 谷歌 map 不显示

问题描述

1 个解决方案

解决方案1
1 2021-11-17 17:32:20

Javascript - 谷歌 map 不显示

问题描述

1 个解决方案

解决方案1 1 2021-11-17 17:32:20

解决方案1
1 2021-11-17 17:32:20