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leaflet.js map with marker options v1

An example of a map presented with leaflet.js and incorperating a marker with a popup, draggability, a title and opacity.

This graph is part of the code samples for the update to the book Leaflet Tips and Tricks to version 1 of leaflet.js.

<!DOCTYPE html>
<html>
<head>
    <title>Simple Leaflet Map</title>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.6.0/dist/leaflet.css"
          integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
          crossorigin=""/></head>
<body>
    <div id="map" style="width: 600px; height: 400px"></div>

<script src="https://unpkg.com/leaflet@1.6.0/dist/leaflet.js"
            integrity="sha512-gZwIG9x3wUXg2hdXF6+rVkLF/0Vi9U8D2Ntg4Ga5I5BZpVkVxlJWbSQtXPSiUTtC0TjtGOmxa1AJPuV0CPthew=="
            crossorigin=""></script>
    <script>
        var map = L.map('map').setView([-41.2858, 174.78682], 14);
        mapLink = 
            '<a href="https://openstreetmap.org">OpenStreetMap</a>';
        L.tileLayer(
            'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: '&copy; ' + mapLink + ' Contributors',
            maxZoom: 18,
            }).addTo(map);
        var marker = L.marker([-41.29042, 174.78219],
            {draggable: true,        // Make the icon dragable
            title: 'Hover Text',     // Add a title
            opacity: 0.5}            // Adjust the opacity
            )
            .addTo(map)
            .bindPopup("<b>Te Papa</b><br>Museum of New Zealand.")
            .openPopup();
        
    </script>
</body>
</html>