google map api มอง marker และ infowindows เป็น overlay ประเภทหนึ่งที่สามารถลบได้โดยการเพิ่มใน array overlays และเปลี่ยนให้เป็น null เหมือนๆกัน
คลิกเพื่อดูตัวอย่าง google maps: สร้างและลบ marker / overlay หรือจะเขียนเองตามตัวอย่างก็ได้
<!doctype html> <html> <head> <meta charset="utf-8"> <title>Google Maps APIs > Maps JavaScript API > Markers > delete overlay</title> <link href="../../vendor/twbs/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet" rel="stylesheet" type="text/css"> <link href="styles.css" rel="stylesheet" type="text/css"> </head> <body> <div class="map" id="mapA"></div> <br> <button class="btn" id="deleteBtn" type="button">Delete Marker</button> <script src="../../vendor/components/jquery/jquery.min.js"></script> <script> var map; var overlays = []; var places = [{ "latitude": 13.7485809, "longitude": 100.5832588, "name_en": "Bangkok Hospital", "name_th": "โรงพยาบาล กรุงเทพ ซอยศูนย์วิจัย" }, { "latitude": 13.746166, "longitude": 100.552348, "name_en": "Bumrungrad International Hospital", "name_th": "โรงพยาบาล บำรุงราษฎร์" }, { "latitude": 13.7679658, "longitude": 100.5345264, "name_en": "Phramongkutklao Hospital", "name_th": "โรงพยาบาลพระมงกุฎเกล้า" }, { "latitude": 13.7561676, "longitude": 100.5391023, "name_en": "Phyathai 1 Hospital", "name_th": "โรงพยาบาล พญาไท 1" }, { "latitude": 13.7698357, "longitude": 100.5404377, "name_en": "Phyathai 2 Hospital", "name_th": "โรงพยาบาล พญาไท 2 อินเตอร์เนชันแนล" }, { "latitude": 13.769295, "longitude": 100.527455, "name_en": "Prasat Neurological Hospital and Institute", "name_th": "สถาบันประสาทวิทยา" }, { "latitude": 13.76188, "longitude": 100.526455, "name_en": "Priest Hospital", "name_th": "โรงพยาบาลสงฆ์" }, { "latitude": 13.7659465, "longitude": 100.5353223, "name_en": "Queen Sirikit National Institute of Child Health", "name_th": "สถาบันสุขภาพเด็กแห่งชาติมหาราชินี" }, { "latitude": 13.7642952, "longitude": 100.5367674, "name_en": "Rajavithi Hospital", "name_th": "โรงพยาบาล ราชวิถี" }, { "latitude": 13.766015, "longitude": 100.5267864, "name_en": "Ramathibodi Hospital", "name_th": "โรงพยาบาลรามาธิบดี" }, { "latitude": 13.7657804, "longitude": 100.5333703, "name_en": "TropMed Hospital for Tropical Diseases - Faculty of Tropical Medicine, Mahidol University", "name_th": "โรงพยาบาล เวชศาสตร์เขตร้อน ม.มหิดล" }, { "latitude": 13.7719828, "longitude": 100.5515745, "name_en": "Veterans General Hospital", "name_th": "โรงพยาบาล ทหารผ่านศึก" }, { "latitude": 13.7831277, "longitude": 100.5336353, "name_en": "Vichaiyut Hospital (North Building)", "name_th": "โรงพยาบาล วิชัยยุทธ" }, { "latitude": 13.7804061, "longitude": 100.5330211, "name_en": "Vichaiyut Medical Center", "name_th": "ศูนย์การแพทย์วิชัยยุทธ" }, { "latitude": 13.7600024, "longitude": 100.534462, "name_en": "Bhumirajanakarindra Kidney Institute Hospital", "name_th": "โรงพยาบาล สถาบันโรคไตภูมิราชนครินทร์" } ]; /* function createMaps */ function createMap(mapArea, position) { var latlng = new google.maps.LatLng(parseFloat(position.latitude), parseFloat(position.longitude)); map = new google.maps.Map(document.getElementById(mapArea), { "zoom": 18 }); map.setCenter(latlng); var marker = new google.maps.Marker({ "map": map, "position": latlng, }); var infowindow = new google.maps.InfoWindow({ "content": 'Latitude = ' + position.latitude + ', ' + ' longitude = ' + position.longitude, "position": latlng, }).open(map, marker); } function deleteOverlays() { var overlaysLength = overlays.length; if (overlaysLength > 1) { for (var a = 0; a <= overlays.length; a++) { if (typeof overlays[a] !== 'undefined') { overlays[a].setMap(null); } } } overlays = []; } function handleLocationError(browserHasGeolocation, infoWindow, pos) { infoWindow.setPosition(pos); infoWindow.setContent(browserHasGeolocation ? 'Error: The Geolocation service failed.' : 'Error: Your browser doesn\'t support geolocation.'); infoWindow.open(map); } function initMap(defaultLatitude = 13.7651991, defaultLongitude = 100.5368694) { position = { "latitude": defaultLatitude, "longitude": defaultLongitude, }; createMap('mapA', position); setMarkers(map) } function setMarkers(map) { for (var a = 0; a < places.length; a++) { var place = places[a]; var marker = new google.maps.Marker({ "map": map, "position": { "lat": parseFloat(place.latitude), "lng": parseFloat(place.longitude) }, "title": place.name_en + "\n" + place.name_th, "zIndex": a }); overlays.push(marker); } } $(function(){ $('#deleteBtn').click(function(){ deleteOverlays(); }); }); </script> <script async defer src="https://maps.googleapis.com/maps/api/js?callback=initMap&key=AIzaSyDE5zb4r9sbN5S_GcD3NZRED1Ma3FzFqso"></script> </body> </html>
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