googlemap

#map {
width: 100%;
height: 400px;
}

My Google Maps Demo

function initMap() {
var mapDiv = document.getElementById(‘map’);
var map = new google.maps.Map(mapDiv, {
center: {lat: 44.540, lng: -78.546},
zoom: 8
});
}

https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap