SOURCE

<div id="components-demo3" class="demo">
    <button-counter2></button-counter2>
    <button-counter2></button-counter2>
    <button-counter2></button-counter2>
</div>

<script>
    var buttonCounter2Data = {
        count: 0
    }
    Vue.component('button-counter2', {
        data: function () {
            return buttonCounter2Data;
        },
        template: `<button v-on:click="count++">You clicked me {{ count }} times.
        </button>\
        `
    })
    new Vue({ el: '#components-demo3' })
</script>