javascript - Display multiple markers, variable and array problems -


i try display multiple markers on map. put multiples location in adata-attribute trough php file. try grab information in javascript one.

if directly paste coordinates, markers appear. if reference data-attribute don't. (the difference on line beginning var locations.)

this code works:

function googlemapsinit(){ settimeout(function initialize() {     var emplacements = $('#iframecarte').attr("data-emplacements");     // emplacements returns [[45.5314817,-73.1835154], [45.570004,-73.448701] ]     var mapoptions = {         zoom: 12,         center: new google.maps.latlng(45.5580421, -73.7303025)     };     var map = new google.maps.map(document.getelementbyid('map-canvas'), mapoptions);      var locations = [[45.5314817,-73.1835154], [45.570004,-73.448701] ];      var marker, i;     var markers = new array();      (i = 0; < locations.length; i++) {         marker = new google.maps.marker({         position: new google.maps.latlng(locations[i][0], locations[i][1]),         map: map       });        markers.push(marker);      }  }, 500); }

this 1 doesn't:

function googlemapsinit(){ settimeout(function initialize() {     var emplacements = $('#iframecarte').attr("data-emplacements");     // emplacements returns [[45.5314817,-73.1835154], [45.570004,-73.448701] ]     var mapoptions = {         zoom: 12,         center: new google.maps.latlng(45.5580421, -73.7303025)     };     var map = new google.maps.map(document.getelementbyid('map-canvas'), mapoptions);      var locations = emplacements;      var marker, i;     var markers = new array();      (i = 0; < locations.length; i++) {         marker = new google.maps.marker({         position: new google.maps.latlng(locations[i][0], locations[i][1]),         map: map       });        markers.push(marker);      }  }, 500); }

what wrong variable locations when references emplacements variable markers don't show?

the non-working version emplacements string, not array.

convert string javascript array:

var locations = json.parse(emplacements);

proof of concept fiddle

code snippet:

function googlemapsinit() {    settimeout(function initialize() {      var emplacements = $('#iframecarte').attr("data-emplacements");      // emplacements returns [[45.5314817,-73.1835154], [45.570004,-73.448701] ]      var mapoptions = {        zoom: 9,        center: new google.maps.latlng(45.5580421, -73.7303025)      };      var map = new google.maps.map(document.getelementbyid('map-canvas'), mapoptions);        var locations = json.parse(emplacements);        var marker, i;      var markers = new array();        (i = 0; < locations.length; i++) {        marker = new google.maps.marker({          position: new google.maps.latlng(locations[i][0], locations[i][1]),          map: map        });          markers.push(marker);        }      }, 500);  }  googlemapsinit();
html,  body,  #map-canvas {    height: 100%;    width: 100%;    margin: 0px;    padding: 0px  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <script src="https://maps.googleapis.com/maps/api/js"></script>  <div id="map-canvas"></div>  <div id="iframecarte" data-emplacements="[[45.5314817,-73.1835154], [45.570004,-73.448701], [45.6066487,-73.712409]]"></div>


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