Driving route directions from source to destination using HTML5 and Javascript

In this article, you will learn how to build the driving route directions from source to destination using HTML5 and Javascript. Driving route direction shows step by step optimized driving directions for your drive. I hope, you have experience on google map to get directions from your location point to destination.

Here, we will learn how to include this route map driving directions on your web page or app.

Driving route directions from source to destination

Get your api key

For showing google map in webpage, we need to generate Google API . For this, first login to your gmail account, go to 'Google API Console' and follow the instructions and get API key.

Create an HTML page and load the Google Map Javascript API into your web page

Here, we have created two files - 'style.css' and 'index.php'

1. style.css

	html, body {  height: 100%; margin: 0; padding: 0; }
	#map { height: 100%; }
	.controls { margin-top: 10px; border: 1px solid transparent; border-radius: 2px 0 0 2px;
		box-sizing: border-box; -moz-box-sizing: border-box; height: 32px; outline: none; 
		box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
	}
	#source { background-color: #EBECFC; font-family: Roboto; font-size: 15px; font-weight: 300;
		margin-left: 12px; padding: 0 11px 0 13px;  text-overflow: ellipsis;  width: 300px; border: 3px solid #462066;
	}
	#destination{ background-color: #EBECFC; font-family: Roboto; font-size: 15px; font-weight: 300;
		margin-left: 20px; padding: 0 11px 0 13px; text-overflow: ellipsis; width: 300px; border: 3px solid #462066;
	}
	#directionclick{ background-color: #462066; font-family: Roboto; font-size: 15px; color: #fff;
		font-weight: 300; margin-left: 10px; margin-top: 10px; padding: 4px; text-overflow: ellipsis; width: 100px;
	}
	#stepInfo{ background-color: #fff; font-family: Roboto; font-size: 15px;
		font-weight: 300; margin-left: 10px; margin-top: 10px; 
		text-overflow: ellipsis; width: 300px; position: absolute; top: 7px;
	}
	.routesegment {
		background: #462066 none repeat scroll 0 0;  border-radius: 5px 5px 0 0; color: #fff;
		display: inline-block;  font-size: 15px; font-weight: bold; height: 23px;
		padding: 6px; width: 290px;
	}
	#source:focus { border-color: #462066; }
	.routeinfo { height: 400px; overflow: auto; padding: 5px; font-size: 13px; }




This is the main file, that we will call on the browser. This file contains two input boxes for source and destination and a search button to get the route segments from source to destination. In this, we are using google.maps.place.SearchBox to place the source and destination input boxes and search button over the map, after that we are using google map directions service to get the directions from source to destination. It is mandatory to generate the 'Google API Key' and replace 'YOUR_API_KEY' with your generated API key.


2. index.php
<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Places Searchbox</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <input id="source" class="controls" type="text" placeholder="Search location"> 
    <input id="destination" class="controls" type="text" placeholder="Enter Destination">
    <div id="icon"><input type="button" name="search" value="search" id="directionclick"/></div>
    <div id="stepInfo" style="display: none;"></div>
    <div id="map"></div>
    <script>
    function initiatlizemap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          center: {lat: 20.5937, lng: 78.9629},
          zoom: 7,
          mapTypeId: 'roadmap'
        });

        // Create the search box and link it to the UI element.
        var input = document.getElementById('source');
        var searchBox = new google.maps.places.SearchBox(input);
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
        
        var inputDes = document.getElementById('destination');
        var searchDesBox = new google.maps.places.SearchBox(inputDes);
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(inputDes);
        
        var searchIcon = document.getElementById('icon');
        var searchIconBox = new google.maps.places.SearchBox(searchIcon); 
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(searchIcon); 
        
        var stepInfo = document.getElementById('stepInfo');
        var searchIconBox = new google.maps.places.SearchBox(stepInfo); 
        map.controls[google.maps.ControlPosition.LEFT_CENTER].push(stepInfo);
        
        var places = searchBox.getPlaces();
        var placesDes = searchDesBox.getPlaces();
        var markers = [];
		
        var pointA = new google.maps.LatLng(28.5584, 77.2029),
        pointB = new google.maps.LatLng(28.6546, 77.2309),
        myOptions = {
          zoom: 7,
          center: pointA
        },
        // Instantiate a directions service.
        directionsService = new google.maps.DirectionsService,
        directionsDisplay = new google.maps.DirectionsRenderer({
          map: map
        });
        var control = document.getElementById('directionclick');
        google.maps.event.addDomListener(control, 'click', function() { 
            getMarker(directionsService, directionsDisplay, map);
        }); 
        google.maps.event.addDomListener(control, 'keyup', function(e) {
            if (e.keyCode == 13) {
             getMarker(directionsService, directionsDisplay, map);
            }
        });     
    }
	function getMarker(directionsService, directionsDisplay, map){ 
		calculateAndDisplayRoute(directionsService, directionsDisplay, map);
	}
	function calculateAndDisplayRoute(directionsService, directionsDisplay, map) {
		var startPoint = document.getElementById('source').value;
		var endPoint = document.getElementById('destination').value;
		directionsService.route({
		  origin: startPoint,
		  destination: endPoint,
		  travelMode: google.maps.TravelMode.DRIVING
		}, function(response, status) {
		  if (status == google.maps.DirectionsStatus.OK) {
			directionsDisplay.setDirections(response);
			showSteps(response, map);
		  } else {
			window.alert('Directions request failed due to ' + status);
		  }
		});
	}
	function showSteps(directionResult, map) {
		var markerArray = []; 
		var myRoute = directionResult.routes[0].legs[0];
		document.getElementById("stepInfo").style.display = "block";
		var text = '<div class="routesegment" ><div style="width: 80%; float:left;">Route Segment</div>
		text += '<div class="closeroute"><a onclick="closeroute()" style="color:#8dd4ff;">X</a></div></div>';
		text += '<div class="routeinfo"><div class="routedirections"><b>Duration:</b> '+myRoute.duration.text + ','
		text += '    <b>Distance:</b> ' + myRoute.distance.text+'<br/>';
		for (var i = 0; i < myRoute.steps.length; i++) {
		  var marker = markerArray[i] = markerArray[i] || new google.maps.Marker;
		  marker.setMap(map);
		  marker.setPosition(myRoute.steps[i].start_location);
		  text += myRoute.steps[i].instructions+'<br/>';
		}
		text += '</div></div>'; 
		document.getElementById('stepInfo').innerHTML = text;
	}
    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places&callback=initiatlizemap"
         async defer>
  </script>
  </body>
</html>




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