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HTML

              
                <!DOCTYPE html>
<head>
    <title>McDuck's Local offers</title>
</head>

<body>
<h1> McDuck's Local Offers</h1>
<!--1. Create a HTML button that when clicked calls the JavaScript getLocation() function -->



<!--Two containers, called divs, used to show messages to user -->

<div id="geodisplay"></div>
<div id="effect"></div>

</body>
</html>
              
            
!

CSS

              
                /* 
5. Once your app is working change the text colors to be McDuck's colors
*/

body {
    text-align: center;
    background: white;

}

h1, h2, h3, p {
    font-family: Sans-Serif;
    color: black;
}

p {
    font-size: 1em;
}
              
            
!

JS

              
                function getLocation() {
	if (navigator.geolocation){
        navigator.geolocation.getCurrentPosition(showLocation);
	}
}

function showLocation(position){

// 2. Hardcode your store location on line 12 and 13, and update the  comment on line 10 to reflect your McDuck's restaurant address
//  Nik's apt @ Perry & W 4th St (change to your restaurant location)

var mcduckslat=40.735383;
var mcduckslon=-74.002994;

// current location
var currentpositionlat=position.coords.latitude;
var currentpositionlon=position.coords.longitude;

// calculate the distance between current location & McDuck's location  
var distance=getDistanceFromLatLonInMiles(mcduckslat, mcduckslon,currentpositionlat,currentpositionlon);
  
// 3. Display the distance using a JavaScript alert(). Comment out the line with two // after you confirm the distance is correct.

  
// 4. Create if-else trigger using an alert()


  
// Displays the location using .innerHTML method and the lat & long coordinates for your current location
document.getElementById("geodisplay").innerHTML="Latitude: " + currentpositionlat + "<br>Longitude: " + currentpositionlon;
}  
    
// Haversine distance formula
 function getDistanceFromLatLonInMiles(lat1,lon1,lat2,lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = deg2rad(lat2-lat1);  // deg2rad below
  var dLon = deg2rad(lon2-lon1); 
  var a = 
    Math.sin(dLat/2) * Math.sin(dLat/2) +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 
    Math.sin(dLon/2) * Math.sin(dLon/2); 
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
  var d = R * c * 0.621371; // Distance in miles
  return d;
 }

 function deg2rad(deg) {
  return deg * (Math.PI/180)
 }

              
            
!
999px

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