The issue of Google map content failing to display within a Bootstrap modal view

Question

The issue of Google map content failing to display within a Bootstrap modal view

https://i.sstatic.net/gaN2t.pngHello amazing coders on Stackoverflow! I am facing an issue where the code below displays a google map when run from a page, but when I embed it into a bootstrap modal, only the shape of the map is shown with no location displayed. Please refer to the attached image for clarification. Can someone kindly assist me with this problem?

Thank you

<!DOCTYPE html>
<html>
<head>
<style>
/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    padding-top: 100px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
    position: relative;
    background-color: #fefefe;
    margin: auto;
    padding: 0;
    border: 1px solid #888;
    width: 80%;
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
    -webkit-animation-name: animatetop;
    -webkit-animation-duration: 0.4s;
    animation-name: animatetop;
    animation-duration: 0.4s
}

/* Add Animation */
@-webkit-keyframes animatetop {
    from {top:-300px; opacity:0} 
    to {top:0; opacity:1}
}

@keyframes animatetop {
    from {top:-300px; opacity:0}
    to {top:0; opacity:1}
}

/* The Close Button */
.close {
    color: white;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

.modal-header {
    padding: 2px 16px;
    background-color: #5cb85c;
    color: white;
}

.modal-body {padding: 2px 16px;}

.modal-footer {
    padding: 2px 16px;
    background-color: #5cb85c;
    color: white;
}
</style>
</head>
<body>

<h2>Animated Modal with Header and Footer</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <div class="modal-header">
      <span class="close">&times;</span>
      <h2>Modal Header</h2>
    </div>
    <div class="modal-body">

<script src="http://maps.google.com/maps/api/js?sensor=false&key=AIzaSyAlb3bRgk_Jq3mBzgpVyLTeeKL-RKaSkx4&callback=initMap" type="text/javascript"></script>


<style>

.map{width: 430px; height: 150px;}
</style>

<div id="map1" class="map"></div>
<script type="text/javascript"> 
var address = "california,USA";
var myLatlng = new google.maps.LatLng(95.1, 16.0);
var map1 = new google.maps.Map(document.getElementById("map1"), {mapTypeId: google.maps.MapTypeId.ROADMAP,zoom: 12,center: myLatlng});
var geocoder = new google.maps.Geocoder();
geocoder.geocode({"address": address},function(results, status) {if(status == google.maps.GeocoderStatus.OK) {
var marker = new google.maps.Marker({position: results[0].geometry.location,map: map1});
map1.setCenter(results[0].geometry.location);}});
</script>

    </div>
    <div class="modal-footer">
      <h3>Modal Footer</h3>
    </div>
  </div>

</div>

<script>
// Get the modal
var modal = document.getElementById('myModal');

// Get the button that opens the modal
var btn = document.getElementById("myBtn");

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks the button, open the modal 
btn.onclick = function() {
    modal.style.display = "block";
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
    modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}
</script>

</body>
</html>

javascript google-maps-api-3 bootstrap-modal

Answer 1

Answer №1

There have been some improvements made to the code below. Pay attention to the "CHANGE" notes in the comments. The main issues addressed are:

Create a parent div for the map div and control the visibility of the parent instead of the map itself. Setting the map div to be invisible initially could disrupt the map functionality, so controlling its parent's visibility will prevent this issue.
Merged the map creation into a function call that only executes the first time you attempt to show the modal. This is managed with a global boolean variable.

Below is the revised and tested code:

<!DOCTYPE html>
<html>

<head>
    <style>
        /* CHANGE 1: created a hidden parent for the modal */

        #parent {
            display: none;
        }
        /* The Modal (background) - CHANGE 2: removed display none */

        .modal {
            position: fixed;
            /* Fixed position */
            z-index: 1;
            /* Top layer */
            padding-top: 100px;
            /* Positioning */
            left: 0;
            top: 0;
            width: 100%;
            /* Full width */
            height: 100%;
            /* Full height */
            overflow: auto;
            /* Scroll enabled if needed */
            background-color: rgb(0, 0, 0);
            /* Fallback color */
            background-color: rgba(0, 0, 0, 0.4);
            /* Black with opacity */
        }
        /* Modal Content */

        .modal-content {
            position: relative;
            background-color: #fefefe;
            margin: auto;
            padding: 0;
            border: 1px solid #888;
            width: 80%;
            box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
            -webkit-animation-name: animatetop;
            -webkit-animation-duration: 0.4s;
            animation-name: animatetop;
            animation-duration: 0.4s
        }
        /* Animation */

        @-webkit-keyframes animatetop {
            from {
                top: -300px;
                opacity: 0
            }
            to {
                top: 0;
                opacity: 1
            }
        }

        @keyframes animatetop {
            from {
                top: -300px;
                opacity: 0
            }
            to {
                top: 0;
                opacity: 1
            }
        }
        /* Close Button */

        .close {
            color: white;
            float: right;
            font-size: 28px;
            font-weight: bold;
        }

        .close:hover,
        .close:focus {
            color: #000;
            text-decoration: none;
            cursor: pointer;
        }

        .modal-header {
            padding: 2px 16px;
            background-color: #5cb85c;
            color: white;
        }

        .modal-body {
            padding: 2px 16px;
        }

        .modal-footer {
            padding: 2px 16px;
            background-color: #5cb85c;
            color: white;
        }
    </style>
</head>

<body>

    <h2>Animated Modal with Header and Footer</h2>

    <!-- Trigger/Open The Modal -->
    <button id="myBtn">Open Modal</button>
    <!-- CHANGE 3: added the parent div -->
    <div id="parent">

        <!-- The Modal -->
        <div id="myModal" class="modal">

            <!-- Modal content -->
            <div class="modal-content">
                <div class="modal-header">
                    <span class="close">&times;</span>
                    <h2>Modal Header</h2>
                </div>
                <div class="modal-body">
                    <script>
                        /* CHANGE 4: included a callback function definition */
                        function initMap() {

                        };

                        /* CHANGE 5: function to create the map when needed */
                        function doMap() {
                            var address = "California, USA";
                            var myLatlng = new google.maps.LatLng(30.2719771, -97.7475389);
                            var map1 = new google.maps.Map(document.getElementById("map1"), {
                                mapTypeId: google.maps.MapTypeId.ROADMAP,
                                zoom: 12,
                                center: myLatlng
                            });
                            var geocoder = new google.maps.Geocoder();
                            geocoder.geocode({
                                "address": address
                            }, function(results, status) {
                                if (status == google.maps.GeocoderStatus.OK) {
                                    var marker = new google.maps.Marker({
                                        position: results[0].geometry.location,
                                        map: map1
                                    });
                                    map1.setCenter(results[0].geometry.location);
                                }
                            });
                        }

                        // CHANGE 6: additional variable to control the parent
                        var parent = document.getElementById('parent');
                        var modal = document.getElementById('myModal');

                        // Access the button that opens the modal
                        var btn = document.getElementById("myBtn");

                        // Locate the <span> element that closes the modal
                        var span = document.getElementsByClassName("close")[0];

                        // CHANGE 7: perform initial setup once
                        var bFirstShow = true;

                        // When the user clicks the button, open the modal
                        btn.onclick = function() {
                            parent.style.display = "block";
                            // Initiate the map when required
                            if (bFirstShow == true) {
                                doMap();
                                bFirstShow = false;
                            }
                        }

                        // On clicking the <span> (x) close the modal
                        span.onclick = function() {
                            parent.style.display = "none";
                        }

                        // If you click outside the modal, close it
                        window.onclick = function(event) {
                            if (event.target == modal) {
                                parent.style.display = "none";
                            }
                        }
                    </script>
                    <script src="http://maps.google.com/maps/api/js?sensor=false&key=YOUR_API_KEY_HERE&callback=initMap" type="text/javascript"></script>


                    <style>
                        .map {
                            width: 430px;
                            height: 150px;
                        }
                    </style>

                    <div id="map1" class="map"></div>
                </div>
                <div class="modal-footer">
                    <h3>Modal Footer</h3>
                </div>
            </div>

        </div>
    </div>
</body>

</html>

I hope this explanation helps! :)

Sincerely,

Dave

Answer 2

There have been some improvements made to the code below. Pay attention to the "CHANGE" notes in the comments. The main issues addressed are:

Create a parent div for the map div and control the visibility of the parent instead of the map itself. Setting the map div to be invisible initially could disrupt the map functionality, so controlling its parent's visibility will prevent this issue.
Merged the map creation into a function call that only executes the first time you attempt to show the modal. This is managed with a global boolean variable.

Below is the revised and tested code:

<!DOCTYPE html>
<html>

<head>
    <style>
        /* CHANGE 1: created a hidden parent for the modal */

        #parent {
            display: none;
        }
        /* The Modal (background) - CHANGE 2: removed display none */

        .modal {
            position: fixed;
            /* Fixed position */
            z-index: 1;
            /* Top layer */
            padding-top: 100px;
            /* Positioning */
            left: 0;
            top: 0;
            width: 100%;
            /* Full width */
            height: 100%;
            /* Full height */
            overflow: auto;
            /* Scroll enabled if needed */
            background-color: rgb(0, 0, 0);
            /* Fallback color */
            background-color: rgba(0, 0, 0, 0.4);
            /* Black with opacity */
        }
        /* Modal Content */

        .modal-content {
            position: relative;
            background-color: #fefefe;
            margin: auto;
            padding: 0;
            border: 1px solid #888;
            width: 80%;
            box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
            -webkit-animation-name: animatetop;
            -webkit-animation-duration: 0.4s;
            animation-name: animatetop;
            animation-duration: 0.4s
        }
        /* Animation */

        @-webkit-keyframes animatetop {
            from {
                top: -300px;
                opacity: 0
            }
            to {
                top: 0;
                opacity: 1
            }
        }

        @keyframes animatetop {
            from {
                top: -300px;
                opacity: 0
            }
            to {
                top: 0;
                opacity: 1
            }
        }
        /* Close Button */

        .close {
            color: white;
            float: right;
            font-size: 28px;
            font-weight: bold;
        }

        .close:hover,
        .close:focus {
            color: #000;
            text-decoration: none;
            cursor: pointer;
        }

        .modal-header {
            padding: 2px 16px;
            background-color: #5cb85c;
            color: white;
        }

        .modal-body {
            padding: 2px 16px;
        }

        .modal-footer {
            padding: 2px 16px;
            background-color: #5cb85c;
            color: white;
        }
    </style>
</head>

<body>

    <h2>Animated Modal with Header and Footer</h2>

    <!-- Trigger/Open The Modal -->
    <button id="myBtn">Open Modal</button>
    <!-- CHANGE 3: added the parent div -->
    <div id="parent">

        <!-- The Modal -->
        <div id="myModal" class="modal">

            <!-- Modal content -->
            <div class="modal-content">
                <div class="modal-header">
                    <span class="close">&times;</span>
                    <h2>Modal Header</h2>
                </div>
                <div class="modal-body">
                    <script>
                        /* CHANGE 4: included a callback function definition */
                        function initMap() {

                        };

                        /* CHANGE 5: function to create the map when needed */
                        function doMap() {
                            var address = "California, USA";
                            var myLatlng = new google.maps.LatLng(30.2719771, -97.7475389);
                            var map1 = new google.maps.Map(document.getElementById("map1"), {
                                mapTypeId: google.maps.MapTypeId.ROADMAP,
                                zoom: 12,
                                center: myLatlng
                            });
                            var geocoder = new google.maps.Geocoder();
                            geocoder.geocode({
                                "address": address
                            }, function(results, status) {
                                if (status == google.maps.GeocoderStatus.OK) {
                                    var marker = new google.maps.Marker({
                                        position: results[0].geometry.location,
                                        map: map1
                                    });
                                    map1.setCenter(results[0].geometry.location);
                                }
                            });
                        }

                        // CHANGE 6: additional variable to control the parent
                        var parent = document.getElementById('parent');
                        var modal = document.getElementById('myModal');

                        // Access the button that opens the modal
                        var btn = document.getElementById("myBtn");

                        // Locate the <span> element that closes the modal
                        var span = document.getElementsByClassName("close")[0];

                        // CHANGE 7: perform initial setup once
                        var bFirstShow = true;

                        // When the user clicks the button, open the modal
                        btn.onclick = function() {
                            parent.style.display = "block";
                            // Initiate the map when required
                            if (bFirstShow == true) {
                                doMap();
                                bFirstShow = false;
                            }
                        }

                        // On clicking the <span> (x) close the modal
                        span.onclick = function() {
                            parent.style.display = "none";
                        }

                        // If you click outside the modal, close it
                        window.onclick = function(event) {
                            if (event.target == modal) {
                                parent.style.display = "none";
                            }
                        }
                    </script>
                    <script src="http://maps.google.com/maps/api/js?sensor=false&key=YOUR_API_KEY_HERE&callback=initMap" type="text/javascript"></script>


                    <style>
                        .map {
                            width: 430px;
                            height: 150px;
                        }
                    </style>

                    <div id="map1" class="map"></div>
                </div>
                <div class="modal-footer">
                    <h3>Modal Footer</h3>
                </div>
            </div>

        </div>
    </div>
</body>

</html>

I hope this explanation helps! :)

Sincerely,

Dave

The issue of Google map content failing to display within a Bootstrap modal view

Answer №1

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