Untitled

<!DOCTYPE>
<html>
    <body>
        <div id="count">
            <div>{{ number }}</div>
            <div>
                <input type="button" value="PUSH!" @click="increment()" />
            </div>
        </div>
        <script src="https://cdn.jsdelivr.net/npm/vue"></script>

        <script>
         var app = new Vue({
             el: "#count",
             data: {
                 number: 0,
             },
             methods: {
                 increment: function () {
                     this.number++;
                 }
             },
         });
        </script>
    </body>
</html>