I've tried looking at a large variety of code blocks here and on the Google Maps API documentation but STILL have not been able to figure out how to hide markers.
This is the current code that I am using, and it worked for one instance. Once I added the "for" loop in the function with markers.setMap(null) Firefox displays the following error:
Error: TypeError: markers.setMap is not a function
function removeMarkers(){
var markers;
alert(markers);
alert(locations.length);
for (i = 0; i<locations.length; i++){
markers = locations[i];
alert(markers.title);
markers.setMap(null);
}
}
Additional Information: Campus Map and full code (excluding Map API)
This question is related to
google-maps
google-maps-api-3
You need to keep an array of the google.maps.Marker
objects to hide (or remove or run other operations on them).
In the global scope:
var gmarkers = [];
Then push the markers on that array as you create them:
var marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i].latitude, locations[i].longitude),
title: locations[i].title,
icon: icon,
map:map
});
// Push your newly created marker into the array:
gmarkers.push(marker);
Then to remove them:
function removeMarkers(){
for(i=0; i<gmarkers.length; i++){
gmarkers[i].setMap(null);
}
}
working example (toggles the markers)
code snippet:
var gmarkers = [];_x000D_
var RoseHulman = new google.maps.LatLng(39.483558, -87.324593);_x000D_
var styles = [{_x000D_
stylers: [{_x000D_
hue: "black"_x000D_
}, {_x000D_
saturation: -90_x000D_
}]_x000D_
}, {_x000D_
featureType: "road",_x000D_
elementType: "geometry",_x000D_
stylers: [{_x000D_
lightness: 100_x000D_
}, {_x000D_
visibility: "simplified"_x000D_
}]_x000D_
}, {_x000D_
featureType: "road",_x000D_
elementType: "labels",_x000D_
stylers: [{_x000D_
visibility: "on"_x000D_
}]_x000D_
}];_x000D_
_x000D_
var styledMap = new google.maps.StyledMapType(styles, {_x000D_
name: "Campus"_x000D_
});_x000D_
var mapOptions = {_x000D_
center: RoseHulman,_x000D_
zoom: 15,_x000D_
mapTypeControl: true,_x000D_
zoomControl: true,_x000D_
zoomControlOptions: {_x000D_
style: google.maps.ZoomControlStyle.SMALL_x000D_
},_x000D_
mapTypeControlOptions: {_x000D_
mapTypeIds: ['map_style', google.maps.MapTypeId.HYBRID],_x000D_
style: google.maps.MapTypeControlStyle.DROPDOWN_MENU_x000D_
},_x000D_
scrollwheel: false,_x000D_
streetViewControl: true,_x000D_
_x000D_
};_x000D_
_x000D_
var map = new google.maps.Map(document.getElementById('map'), mapOptions);_x000D_
map.mapTypes.set('map_style', styledMap);_x000D_
map.setMapTypeId('map_style');_x000D_
_x000D_
var infowindow = new google.maps.InfoWindow({_x000D_
maxWidth: 300,_x000D_
infoBoxClearance: new google.maps.Size(1, 1),_x000D_
disableAutoPan: false_x000D_
});_x000D_
_x000D_
var marker, i, icon, image;_x000D_
_x000D_
var locations = [{_x000D_
"id": "1",_x000D_
"category": "6",_x000D_
"campus_location": "F2",_x000D_
"title": "Alpha Tau Omega Fraternity",_x000D_
"description": "<p>Alpha Tau Omega house</p>",_x000D_
"longitude": "-87.321133",_x000D_
"latitude": "39.484092"_x000D_
}, {_x000D_
"id": "2",_x000D_
"category": "6",_x000D_
"campus_location": "B2",_x000D_
"title": "Apartment Commons",_x000D_
"description": "<p>The commons area of the apartment-style residential complex</p>",_x000D_
"longitude": "-87.329282",_x000D_
"latitude": "39.483599"_x000D_
}, {_x000D_
"id": "3",_x000D_
"category": "6",_x000D_
"campus_location": "B2",_x000D_
"title": "Apartment East",_x000D_
"description": "<p>Apartment East</p>",_x000D_
"longitude": "-87.328809",_x000D_
"latitude": "39.483748"_x000D_
}, {_x000D_
"id": "4",_x000D_
"category": "6",_x000D_
"campus_location": "B2",_x000D_
"title": "Apartment West",_x000D_
"description": "<p>Apartment West</p>",_x000D_
"longitude": "-87.329732",_x000D_
"latitude": "39.483429"_x000D_
}, {_x000D_
"id": "5",_x000D_
"category": "6",_x000D_
"campus_location": "C2",_x000D_
"title": "Baur-Sames-Bogart (BSB) Hall",_x000D_
"description": "<p>Baur-Sames-Bogart Hall</p>",_x000D_
"longitude": "-87.325714",_x000D_
"latitude": "39.482382"_x000D_
}, {_x000D_
"id": "6",_x000D_
"category": "6",_x000D_
"campus_location": "D3",_x000D_
"title": "Blumberg Hall",_x000D_
"description": "<p>Blumberg Hall</p>",_x000D_
"longitude": "-87.328321",_x000D_
"latitude": "39.483388"_x000D_
}, {_x000D_
"id": "7",_x000D_
"category": "1",_x000D_
"campus_location": "E1",_x000D_
"title": "The Branam Innovation Center",_x000D_
"description": "<p>The Branam Innovation Center</p>",_x000D_
"longitude": "-87.322614",_x000D_
"latitude": "39.48494"_x000D_
}, {_x000D_
"id": "8",_x000D_
"category": "6",_x000D_
"campus_location": "G3",_x000D_
"title": "Chi Omega Sorority",_x000D_
"description": "<p>Chi Omega house</p>",_x000D_
"longitude": "-87.319905",_x000D_
"latitude": "39.482071"_x000D_
}, {_x000D_
"id": "9",_x000D_
"category": "3",_x000D_
"campus_location": "D1",_x000D_
"title": "Cook Stadium/Phil Brown Field",_x000D_
"description": "<p>Cook Stadium at Phil Brown Field</p>",_x000D_
"longitude": "-87.325258",_x000D_
"latitude": "39.485007"_x000D_
}, {_x000D_
"id": "10",_x000D_
"category": "1",_x000D_
"campus_location": "D2",_x000D_
"title": "Crapo Hall",_x000D_
"description": "<p>Crapo Hall</p>",_x000D_
"longitude": "-87.324368",_x000D_
"latitude": "39.483709"_x000D_
}, {_x000D_
"id": "11",_x000D_
"category": "6",_x000D_
"campus_location": "G3",_x000D_
"title": "Delta Delta Delta Sorority",_x000D_
"description": "<p>Delta Delta Delta</p>",_x000D_
"longitude": "-87.317477",_x000D_
"latitude": "39.482951"_x000D_
}, {_x000D_
"id": "12",_x000D_
"category": "6",_x000D_
"campus_location": "D2",_x000D_
"title": "Deming Hall",_x000D_
"description": "<p>Deming Hall</p>",_x000D_
"longitude": "-87.325822",_x000D_
"latitude": "39.483421"_x000D_
}, {_x000D_
"id": "13",_x000D_
"category": "5",_x000D_
"campus_location": "F1",_x000D_
"title": "Facilities Operations",_x000D_
"description": "<p>Facilities Operations</p>",_x000D_
"longitude": "-87.321782",_x000D_
"latitude": "39.484916"_x000D_
}, {_x000D_
"id": "14",_x000D_
"category": "2",_x000D_
"campus_location": "E3",_x000D_
"title": "Flame of the Millennium",_x000D_
"description": "<p>Flame of Millennium sculpture</p>",_x000D_
"longitude": "-87.323306",_x000D_
"latitude": "39.481978"_x000D_
}, {_x000D_
"id": "15",_x000D_
"category": "5",_x000D_
"campus_location": "E2",_x000D_
"title": "Hadley Hall",_x000D_
"description": "<p>Hadley Hall</p>",_x000D_
"longitude": "-87.324046",_x000D_
"latitude": "39.482887"_x000D_
}, {_x000D_
"id": "16",_x000D_
"category": "2",_x000D_
"campus_location": "F2",_x000D_
"title": "Hatfield Hall",_x000D_
"description": "<p>Hatfield Hall</p>",_x000D_
"longitude": "-87.322340",_x000D_
"latitude": "39.482146"_x000D_
}, {_x000D_
"id": "17",_x000D_
"category": "6",_x000D_
"campus_location": "C2",_x000D_
"title": "Hulman Memorial Union",_x000D_
"description": "<p>Hulman Memorial Union</p>",_x000D_
"longitude": "-87.32698",_x000D_
"latitude": "39.483574"_x000D_
}, {_x000D_
"id": "18",_x000D_
"category": "1",_x000D_
"campus_location": "E2",_x000D_
"title": "John T. Myers Center for Technological Research with Industry",_x000D_
"description": "<p>John T. Myers Center for Technological Research With Industry</p>",_x000D_
"longitude": "-87.322984",_x000D_
"latitude": "39.484063"_x000D_
}, {_x000D_
"id": "19",_x000D_
"category": "6",_x000D_
"campus_location": "A2",_x000D_
"title": "Lakeside Hall",_x000D_
"description": "<p></p>",_x000D_
"longitude": "-87.330612",_x000D_
"latitude": "39.482804"_x000D_
}, {_x000D_
"id": "20",_x000D_
"category": "6",_x000D_
"campus_location": "F2",_x000D_
"title": "Lambda Chi Alpha Fraternity",_x000D_
"description": "<p>Lambda Chi Alpha</p>",_x000D_
"longitude": "-87.320999",_x000D_
"latitude": "39.48305"_x000D_
}, {_x000D_
"id": "21",_x000D_
"category": "1",_x000D_
"campus_location": "D2",_x000D_
"title": "Logan Library",_x000D_
"description": "<p>Logan Library</p>",_x000D_
"longitude": "-87.324851",_x000D_
"latitude": "39.483408"_x000D_
}, {_x000D_
"id": "22",_x000D_
"category": "6",_x000D_
"campus_location": "C2",_x000D_
"title": "Mees Hall",_x000D_
"description": "<p>Mees Hall</p>",_x000D_
"longitude": "-87.32778",_x000D_
"latitude": "39.483533"_x000D_
}, {_x000D_
"id": "23",_x000D_
"category": "1",_x000D_
"campus_location": "E2",_x000D_
"title": "Moench Hall",_x000D_
"description": "<p>Moench Hall</p>",_x000D_
"longitude": "-87.323695",_x000D_
"latitude": "39.483471"_x000D_
}, {_x000D_
"id": "24",_x000D_
"category": "1",_x000D_
"campus_location": "G4",_x000D_
"title": "Oakley Observatory",_x000D_
"description": "<p>Oakley Observatory</p>",_x000D_
"longitude": "-87.31616",_x000D_
"latitude": "39.483789"_x000D_
}, {_x000D_
"id": "25",_x000D_
"category": "1",_x000D_
"campus_location": "D2",_x000D_
"title": "Olin Hall and Olin Advanced Learning Center",_x000D_
"description": "<p>Olin Hall</p>",_x000D_
"longitude": "-87.324550",_x000D_
"latitude": "39.482796"_x000D_
}, {_x000D_
"id": "26",_x000D_
"category": "6",_x000D_
"campus_location": "C3",_x000D_
"title": "Percopo Hall",_x000D_
"description": "<p>Percopo Hall</p>",_x000D_
"longitude": "-87.328182",_x000D_
"latitude": "39.482121"_x000D_
}, {_x000D_
"id": "27",_x000D_
"category": "6",_x000D_
"campus_location": "G3",_x000D_
"title": "Public Safety Office",_x000D_
"description": "<p>The Office of Public Safety</p>",_x000D_
"longitude": "-87.320377",_x000D_
"latitude": "39.48191"_x000D_
}, {_x000D_
"id": "28",_x000D_
"category": "1",_x000D_
"campus_location": "E2",_x000D_
"title": "Rotz Mechanical Engineering Lab",_x000D_
"description": "<p>Rotz Lab</p>",_x000D_
"longitude": "-87.323247",_x000D_
"latitude": "39.483711"_x000D_
}, {_x000D_
"id": "28",_x000D_
"category": "6",_x000D_
"campus_location": "C2",_x000D_
"title": "Scharpenberg Hall",_x000D_
"description": "<p>Scharpenberg Hall</p>",_x000D_
"longitude": "-87.328139",_x000D_
"latitude": "39.483582"_x000D_
}, {_x000D_
"id": "29",_x000D_
"category": "6",_x000D_
"campus_location": "G2",_x000D_
"title": "Sigma Nu Fraternity",_x000D_
"description": "<p>The Sigma Nu house</p>",_x000D_
"longitude": "-87.31999",_x000D_
"latitude": "39.48374"_x000D_
}, {_x000D_
"id": "30",_x000D_
"category": "6",_x000D_
"campus_location": "E4",_x000D_
"title": "South Campus / Rose-Hulman Ventures",_x000D_
"description": "<p></p>",_x000D_
"longitude": "-87.330623",_x000D_
"latitude": "39.417646"_x000D_
}, {_x000D_
"id": "31",_x000D_
"category": "6",_x000D_
"campus_location": "C3",_x000D_
"title": "Speed Hall",_x000D_
"description": "<p>Speed Hall</p>",_x000D_
"longitude": "-87.326632",_x000D_
"latitude": "39.482121"_x000D_
}, {_x000D_
"id": "32",_x000D_
"category": "3",_x000D_
"campus_location": "C1",_x000D_
"title": "Sports and Recreation Center",_x000D_
"description": "<p></p>",_x000D_
"longitude": "-87.3272",_x000D_
"latitude": "39.484874"_x000D_
}, {_x000D_
"id": "33",_x000D_
"category": "6",_x000D_
"campus_location": "F2",_x000D_
"title": "Triangle Fraternity",_x000D_
"description": "<p>Triangle fraternity</p>",_x000D_
"longitude": "-87.32113",_x000D_
"latitude": "39.483659"_x000D_
}, {_x000D_
"id": "34",_x000D_
"category": "6",_x000D_
"campus_location": "B3",_x000D_
"title": "White Chapel",_x000D_
"description": "<p>The White Chapel</p>",_x000D_
"longitude": "-87.329367",_x000D_
"latitude": "39.482481"_x000D_
}, {_x000D_
"id": "35",_x000D_
"category": "6",_x000D_
"campus_location": "F2",_x000D_
"title": "Women's Fraternity Housing",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.320753",_x000D_
"latitude": "39.482401"_x000D_
}, {_x000D_
"id": "36",_x000D_
"category": "3",_x000D_
"campus_location": "E1",_x000D_
"title": "Intramural Fields",_x000D_
"description": "<p></p>",_x000D_
"longitude": "-87.321267",_x000D_
"latitude": "39.485934"_x000D_
}, {_x000D_
"id": "37",_x000D_
"category": "3",_x000D_
"campus_location": "A3",_x000D_
"title": "James Rendel Soccer Field",_x000D_
"description": "<p></p>",_x000D_
"longitude": "-87.332135",_x000D_
"latitude": "39.480933"_x000D_
}, {_x000D_
"id": "38",_x000D_
"category": "3",_x000D_
"campus_location": "B2",_x000D_
"title": "Art Nehf Field",_x000D_
"description": "<p>Art Nehf Field</p>",_x000D_
"longitude": "-87.330923",_x000D_
"latitude": "39.48022"_x000D_
}, {_x000D_
"id": "39",_x000D_
"category": "3",_x000D_
"campus_location": "B2",_x000D_
"title": "Women's Softball Field",_x000D_
"description": "<p></p>",_x000D_
"longitude": "-87.329904",_x000D_
"latitude": "39.480278"_x000D_
}, {_x000D_
"id": "40",_x000D_
"category": "3",_x000D_
"campus_location": "D1",_x000D_
"title": "Joy Hulbert Tennis Courts",_x000D_
"description": "<p>The Joy Hulbert Outdoor Tennis Courts</p>",_x000D_
"longitude": "-87.323767",_x000D_
"latitude": "39.485595"_x000D_
}, {_x000D_
"id": "41",_x000D_
"category": "6",_x000D_
"campus_location": "B2",_x000D_
"title": "Speed Lake",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.328134",_x000D_
"latitude": "39.482779"_x000D_
}, {_x000D_
"id": "42",_x000D_
"category": "5",_x000D_
"campus_location": "F1",_x000D_
"title": "Recycling Center",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.320098",_x000D_
"latitude": "39.484593"_x000D_
}, {_x000D_
"id": "43",_x000D_
"category": "1",_x000D_
"campus_location": "F3",_x000D_
"title": "Army ROTC",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.321342",_x000D_
"latitude": "39.481992"_x000D_
}, {_x000D_
"id": "44",_x000D_
"category": "2",_x000D_
"campus_location": " ",_x000D_
"title": "Self Made Man",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.326272",_x000D_
"latitude": "39.484481"_x000D_
}, {_x000D_
"id": "P1",_x000D_
"category": "4",_x000D_
"title": "Percopo Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.328756",_x000D_
"latitude": "39.481587"_x000D_
}, {_x000D_
"id": "P2",_x000D_
"category": "4",_x000D_
"title": "Speed Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.327361",_x000D_
"latitude": "39.481694"_x000D_
}, {_x000D_
"id": "P3",_x000D_
"category": "4",_x000D_
"title": "Main Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.326245",_x000D_
"latitude": "39.481446"_x000D_
}, {_x000D_
"id": "P4",_x000D_
"category": "4",_x000D_
"title": "Lakeside Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.330848",_x000D_
"latitude": "39.483284"_x000D_
}, {_x000D_
"id": "P5",_x000D_
"category": "4",_x000D_
"title": "Hatfield Hall Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.321417",_x000D_
"latitude": "39.482398"_x000D_
}, {_x000D_
"id": "P6",_x000D_
"category": "4",_x000D_
"title": "Women's Fraternity Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.320977",_x000D_
"latitude": "39.482315"_x000D_
}, {_x000D_
"id": "P7",_x000D_
"category": "4",_x000D_
"title": "Myers and Facilities Parking",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.322243",_x000D_
"latitude": "39.48417"_x000D_
}, {_x000D_
"id": "P8",_x000D_
"category": "4",_x000D_
"title": "",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.323241",_x000D_
"latitude": "39.484758"_x000D_
}, {_x000D_
"id": "P9",_x000D_
"category": "4",_x000D_
"title": "",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.323617",_x000D_
"latitude": "39.484311"_x000D_
}, {_x000D_
"id": "P10",_x000D_
"category": "4",_x000D_
"title": "",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.325714",_x000D_
"latitude": "39.484584"_x000D_
}, {_x000D_
"id": "P11",_x000D_
"category": "4",_x000D_
"title": "",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.32778",_x000D_
"latitude": "39.484145"_x000D_
}, {_x000D_
"id": "P12",_x000D_
"category": "4",_x000D_
"title": "",_x000D_
"description": "",_x000D_
"image": "",_x000D_
"longitude": "-87.329035",_x000D_
"latitude": "39.4848"_x000D_
}];_x000D_
_x000D_
for (i = 0; i < locations.length; i++) {_x000D_
_x000D_
var marker = new google.maps.Marker({_x000D_
position: new google.maps.LatLng(locations[i].latitude, locations[i].longitude),_x000D_
title: locations[i].title,_x000D_
map: map_x000D_
});_x000D_
gmarkers.push(marker);_x000D_
google.maps.event.addListener(marker, 'click', (function(marker, i) {_x000D_
return function() {_x000D_
if (locations[i].description !== "" || locations[i].title !== "") {_x000D_
infowindow.setContent('<div class="content" id="content-' + locations[i].id +_x000D_
'" style="max-height:300px; font-size:12px;"><h3>' + locations[i].title + '</h3>' +_x000D_
'<hr class="grey" />' +_x000D_
hasImage(locations[i]) +_x000D_
locations[i].description) + '</div>';_x000D_
infowindow.open(map, marker);_x000D_
}_x000D_
}_x000D_
})(marker, i));_x000D_
}_x000D_
_x000D_
function toggleMarkers() {_x000D_
for (i = 0; i < gmarkers.length; i++) {_x000D_
if (gmarkers[i].getMap() != null) gmarkers[i].setMap(null);_x000D_
else gmarkers[i].setMap(map);_x000D_
}_x000D_
}_x000D_
_x000D_
function hasImage(location) {_x000D_
return '';_x000D_
}
_x000D_
html,_x000D_
body,_x000D_
#map {_x000D_
height: 100%;_x000D_
width: 100%;_x000D_
}
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>_x000D_
<div id="controls">_x000D_
<input type="button" value="Toggle All Markers" onClick="toggleMarkers()" />_x000D_
</div>_x000D_
<div id="map"></div>
_x000D_
Following code might be useful if someone is using React and has a different component of Marker and want to remove marker from map.
export default function useGoogleMapMarker(props) {
const [marker, setMarker] = useState();
useEffect(() => {
// ...code
const marker = new maps.Marker({ position, map, title, icon });
// ...code
setMarker(marker);
return () => marker.setMap(null); // to remove markers when unmounts
}, []);
return marker;
}
According to Google documentation they said that this is the best way to do it. First create this function to find out how many markers there are/
function setMapOnAll(map1) {
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(map1);
}
}
Next create another function to take away all these markers
function clearMarker(){
setMapOnAll(null);
}
Then create this final function to erase all the markers when ever this function is called upon.
function delateMarkers(){
clearMarker()
markers = []
//console.log(markers) This is just if you want to
}
Hope that helped good luck
You can try this
markers[markers.length-1].setMap(null);
Hope it works.
Source: Stackoverflow.com