Pass parameters to a url callback function in JavaScript

user_2564199 0
Viewed 10434

I have the following piece of code which displays a map when the user clicks on the submit button.

At the moment the function initialize() takes no parameters and the map centers on a fixed latitude and longitude. I would like to be able to have latitude and longitude as parameters so that the map centers on those.

I have the latitude and the longitude already so getting these parameters isn't the problem; my problem is that I don't know how to pass them to the function.

Full code:

<!DOCTYPE html>
<html>
    <head>
      <link rel="stylesheet" type="text/css" href="stylesheet.css">
      <title>Simple Map</title>
      <meta name="viewport" content="initial-scale=1.0">
      <meta charset="utf-8">
    </head>
<body>
    <div id="map">

        <button type="button" onclick="loadScript()">submit</button>

    </div>


    <script>

        function initialize() {
            var latlng = new google.maps.LatLng(-34.397, 150.644);
            var myOptions = {
                zoom: 10,
                center: latlng,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };
            var map = new google.maps.Map(document.getElementById("map"),
        myOptions);
        }


        function loadScript() {
            var myKey = "myAPIKey";
            var script = document.createElement('script');
            script.type = 'text/javascript';
            script.src = "https://maps.googleapis.com/maps/api/js?key=" + myKey + "&sensor=false&callback=initialize";
            document.body.appendChild(script);
        }

    </script>

</body>

JavaScript alone:

        function initialize() {
            var latlng = new google.maps.LatLng(-34.397, 150.644);
            var myOptions = {
                zoom: 10,
                center: latlng,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };
            var map = new google.maps.Map(document.getElementById("map"),
        myOptions);
        }


        function loadScript() {
            var myKey = "myAPIKey";
            var script = document.createElement('script');
            script.type = 'text/javascript';
            script.src = "https://maps.googleapis.com/maps/api/js?key=" + myKey + "&sensor=false&callback=initialize";
            document.body.appendChild(script);
        }
callback google-maps javascript
3 Answers

I solved passing parameter to callback by creating an extra function like so:

var id = $($element).attr("id");;
var callBackName = id+"_callback";
window[callBackName] = new Function("googleMapCallback(\""+id+"\")");
script.src = "https://maps.googleapis.com/maps/api/js?&sensor=false&callback=window."+callBackName;

This way you can have an element with all of the content and you can get back to it.

user_23323370
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