没有nodejs的Openlayers 6标记弹出窗口？

Question

I'm a newbie with openlayers and a bit confused on their nodejs style, for my reasons I can't use nodejs and I'm struggling on how to find some good documentation for achieving my goal without the use of NodejS, basically I need to click on a marker and get a popup related to the marker to appear for showing some info about that marker like city name and population number, all those info are given to me by a jSon received from the server. This is my Javascript script and the small portion of Html, can anyone please explain me ho to achieve this with an example?

HTML

<div id="mapdiv" style="height: 500px;width: 100%;"><div id="popup"></div></div>

JAVASCRIPT

<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.3.1/build/ol.js"></script>
    @Scripts.Render("~/Scripts/jquery-3.3.1.js");
    <script>
        var jsonObject = { "coords": [] };
        $.ajax({
            url: '@Url.Action("GetPlaces", "Place")',   //Indirizzo controller.
            type: 'GET',
            success: function (data) {
                for (var i = 0; i < data.length; i++) {
                    var descr = data[i].descrizione;
                    var coord = data[i];
                    //var coordObj = JSON.stringify(coord);
                    jsonObject['coords'].push(coord);
                }
                //var temp = JSON.stringify(data);
                //geojsonObject = JSON.parse(data);
            },
            async: false
        });


        const features = [];

        for (const coord of jsonObject.coords) {
            features.push(new ol.Feature({
                geometry: new ol.geom.Point(
                    ol.proj.fromLonLat([coord.longitude, coord.latitude]),
                    'XY'
                )
            }));
        }

        const style = new ol.style.Style({
            image: new ol.style.Icon({

                    anchor: [0.5, 0.5],
                    size: [2400, 2400],
                    offset: [52, 0],
                    opacity: 1,
                    scale: 0.012,
                src: "http://localhost:22950/Assets/pin-png-39460.png"
            })
        });

        const vectorSource = new ol.source.Vector({
            features
        });

        const vectorLayer = new ol.layer.Vector({
            source: vectorSource,
            style
        });

        const map = new ol.Map({
            target: 'mapdiv',
            layers: [
                new ol.layer.Tile({
                    source: new ol.source.OSM()
                }),
                vectorLayer
            ],
            view: new ol.View({
                center: ol.proj.fromLonLat([45.32, 8.41]),
                zoom: 3
            })
        });
    </script>

The above code is working very well as I'm able to display markers correctly on the map.

Answer 1

Below is a code snippet that creates a popup (InfoWindow) for markers, displaying the name property of the feature.

working example

The code that creates the popup and opens it:

/**
 * Elements that make up the popup.
 */
var container = document.getElementById('popup');
var content = document.getElementById('popup-content');
var closer = document.getElementById('popup-closer');

/**
 * Add a click handler to hide the popup.
 * @return {boolean} Don't follow the href.
 */
closer.onclick = function() {
  overlay.setPosition(undefined);
  closer.blur();
  return false;
};

/**
 * Create an overlay to anchor the popup to the map.
 */
var overlay = new ol.Overlay({
  element: container,
  autoPan: true,
  autoPanAnimation: {
    duration: 250
  }
});

/**
* Add a click handler to the map to render the popup.
*/
map.on('singleclick', function(evt) {
  var name = map.forEachFeatureAtPixel(evt.pixel, function(feature) {
    return feature.get('name');
  })
  if (name) {
    container.style.display="block";
    var coordinate = evt.coordinate;
    content.innerHTML = name;
    overlay.setPosition(coordinate);
  } else {
    container.style.display="none";
  }
});

Based on the following example:

• Popup

 var locations = [ ['Bondi Beach', -33.890542, 151.274856, "green"], ['Coogee Beach', -33.923036, 151.259052, "blue"], ['Cronulla Beach', -34.028249, 151.157507, "yellow"], ['Manly Beach', -33.80010128657071, 151.28747820854187, "purple"], ['Maroubra Beach', -33.950198, 151.259302, "red"] ]; /** * Elements that make up the popup. */ var container = document.getElementById('popup'); var content = document.getElementById('popup-content'); var closer = document.getElementById('popup-closer'); /** * Add a click handler to hide the popup. * @return {boolean} Don't follow the href. */ closer.onclick = function() { overlay.setPosition(undefined); closer.blur(); return false; }; /** * Create an overlay to anchor the popup to the map. */ var overlay = new ol.Overlay({ element: container, autoPan: true, autoPanAnimation: { duration: 250 } }); var features = []; for (var i = 0; i < locations.length; i++) { features.push(coloredSvgMarker([locations[i][2], locations[i][1]], locations[i][0], locations[i][3])); } var vectorSource = new ol.source.Vector({ // VectorSource({ features: features }); var vectorLayer = new ol.layer.Vector({ // VectorLayer({ source: vectorSource }); var map = new ol.Map({ layers: [ new ol.layer.Tile({ // TileLayer({ source: new ol.source.OSM() }), vectorLayer ], overlays: [overlay], target: 'map', view: new ol.View({ center: ol.proj.fromLonLat([-0.12755, 51.507222]), zoom: 10 }) }); // make the map's view to zoom and pan enough to display all the points map.getView().fit(vectorSource.getExtent(), map.getSize()); /** * Add a click handler to the map to render the popup. */ map.on('singleclick', function(evt) { var name = map.forEachFeatureAtPixel(evt.pixel, function(feature) { return feature.get('name'); }) if (name) { container.style.display = "block"; var coordinate = evt.coordinate; content.innerHTML = name; overlay.setPosition(coordinate); } else { container.style.display = "none"; } }); map.on('pointermove', function(evt) { map.getTargetElement().style.cursor = map.hasFeatureAtPixel(evt.pixel)? 'pointer': ''; }); function coloredSvgMarker(lonLat, name, color, circleFill) { if (;color) color = 'red'; if (.circleFill) circleFill = 'white': var feature = new ol.Feature({ geometry. new ol.geom.Point(ol,proj:fromLonLat(lonLat)); name. name }): var svg = '<svg version="1.1" id="Layer_1" xmlns="http.//www:w3:org/2000/svg" xmlns.xlink="http.//www:w3.org/1999/xlink" x="0px" y="0px" width="30px" height="30px" viewBox="0 0 30 30" enable-background="new 0 0 30 30" xml,space="preserve">' + '<path fill="' + color + '" d="M22.906,10.438c0.4,367-6.281.14,312-7.906.17.031c-1.719-2.75-7.906-12.665-7.906-17,031S10.634,2,531.15.2,531S22.906,6.071,22.906.10.438z"/>' + '<circle fill="' + circleFill + '" cx="15" cy="10;677" r="3.291"/></svg>'. feature.setStyle( new ol:style.Style({ image. new ol:style.Icon({ anchor, [0.5, 1:0], anchorXUnits: 'fraction', anchorYUnits: 'fraction': src, 'data,image/svg+xml:' + escape(svg), scale: 2, imgSize, [30; 30]; }) }) ); return feature; }

 html, body { height: 100%; width: 100%; padding: 0px; margin: 0px; }.map { height: 100%; width: 100%; }.ol-popup { position: absolute; background-color: white; -webkit-filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.2)); filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.2)); padding: 15px; border-radius: 10px; border: 1px solid #cccccc; bottom: 12px; left: -50px; min-width: 80px; }.ol-popup:after, .ol-popup:before { top: 100%; border: solid transparent; content: " "; height: 0; width: 0; position: absolute; pointer-events: none; }.ol-popup:after { border-top-color: white; border-width: 10px; left: 48px; margin-left: -10px; }.ol-popup:before { border-top-color: #cccccc; border-width: 11px; left: 48px; margin-left: -11px; }.ol-popup-closer { text-decoration: none; position: absolute; top: 2px; right: 8px; }.ol-popup-closer:after { content: "x"; }

 <link rel="stylesheet" href="https://openlayers.org/en/v6.3.0/css/ol.css" type="text/css"> <.-- The line below is only needed for old environments like Internet Explorer and Android 4:x --> <script src="https.//cdn.polyfill.io/v2/polyfill.min?js,features=requestAnimationFrame.Element.prototype,classList:URL"></script> <script src="https.//openlayers.org/en/v6.3.0/build/ol.js" type="text/javascript"></script> <div id="map" class="map"></div> <div id="popup" class="ol-popup"> <a href="#" id="popup-closer" class="ol-popup-closer"></a> <div id="popup-content"></div> </div>