Javascript Course

The code snippet presented in this page can be used to add a google map image in web page with the location of the visitor's internet connection, using the geolocation JavaScript object.


Script code

<h4>Example Google Map with Geolocation JavaScript</h4>
<p>Click on this button to show a map with geolocation of your internet connection.</p>

<button id="get_geoloc">Show Geolocation</button>
<div id="geoloc_resp"></div>
<script>
function showGeoLoc(){
 var geoloc_resp = document.getElementById('geoloc_resp'); //element to add geolocation response

 //if the browser not support geolocation, show message
 if(!navigator.geolocation){
 geoloc_resp.innerHTML ='Geolocation is not supported by your browser';
 return;
 }

 geoloc_resp.innerHTML ='LOADING...';

 //get latitude and longitude position
 navigator.geolocation.getCurrentPosition(function(position){
 var latt = position.coords.latitude;
 var long = position.coords.longitude;
 var img_size = {w:400, h:350}; //image size

 //add in #geoloc_resp google map image with location
 geoloc_resp.innerHTML ='Latitude is: '+ latt +'<br>Longitude is: '+ long +'<br><img src="https://maps.googleapis.com/maps/api/staticmap?center='+ latt +','+ long +'&zoom=14&size='+ img_size.w +'x'+ img_size.h +'&markers=color:red|size:mid|'+ latt +','+ long +'" alt="Google map location" width=""'+ img_size.w +'" height="'+ img_size.h +'" />';
 }, function(err){
 //in case or error, show error message and its code
 geoloc_resp.innerHTML ='Unable to retrieve your location.<br>Error code: '+ err.code +'<br>Error message: '+ err.message;
 });
}

//register click event to button to call showGeoLoc() function
var get_geoloc = document.getElementById('get_geoloc');
if(get_geoloc) get_geoloc.addEventListener('click', showGeoLoc);
</script>

Demo

Click on this button to show a map with geolocation of your internet connection.

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which tag is used in <table> to create table header cell?
<thead> <th> <td>
<table><tr>
  <th>Title 1</th>
  <th>Title 2</th>
</tr></table>
Which CSS property sets the distance between lines?
line-height word-spacing margin
.some_class {
  line-height: 150%;
}
Which function opens a new browser window.
alert() confirm() open()
document.getElementById("id_button").onclick = function(){
  window.open("http://coursesweb.net/");
}
Indicate the PHP function that returns an array with names of the files and folders inside a directory.
mkdir() scandir() readdir()
$ar_dir = scandir("dir_name");
var_export($ar_dir);
Show Google Map image with Geolocation JavaScript object

Last accessed pages

  1. Integer and Float value in Select with PDO from string to numeric (8672)
  2. Get and change IFrame content through a JavaScript script created in another IFrame (16553)
  3. Shape Tween - Flash Animation (6185)
  4. CSS Border (6122)
  5. Disable button and Enable it after specified time (17587)

Popular pages this month

  1. Courses Web: PHP-MySQL JavaScript Node.js Ajax HTML CSS (524)
  2. CSS cursor property - Custom Cursors (70)
  3. The Mastery of Love (50)
  4. PHP-MySQL free course, online tutorials PHP MySQL code (48)
  5. Read Excel file data in PHP - PhpExcelReader (46)