static-test.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <title></title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <style>
            .title {font-family: Arial, Helvetica, sans-serif;font-size: 13pt;}
        </style>
    </head>

    <body>

        <script src="//unpkg.com/mithril/mithril.js"></script>
        <script>
        function share() {
            if (!navigator.share) {
                console.log('omg you don\'t have share. sad day for you.');
                return;
            }
            navigator.share({
                title: 'Web Fundamentals',
                text: 'Check out Web Fundamentals — it rocks!',
                url: 'https://developers.google.com/web'
            })
            .then(function (r) {
                console.log('success', r);
            })
            .catch(function (e) {
                console.log(e);
            })
        }
        var root = document.body;
        var View1 = {
            view: function() {
                return m("main", [
                    m("h1", {class: "title"}, "My first app"),
                    m("button", {onClick: share()}, "share things.. if you can")
                ])
            }
        }
        m.mount(root, View1);


    </script>
    </body>
</html>