SOURCE

new Vue({
    el: "#exercise",
    data: {
        value: 0,
    },
    computed: {
        result: function() {
            return this.value == 37 ? 'done' : 'not there yet';
        }
    },
    watch: {
        result: function() {
            var vm = this;
            setTimeout(function() {
                vm.value = 0;
            }, 5000)
        }
    }
})

<div id="exercise">
    <div>
        <p>Current Value: {{ value }}</p>
        <button @click="value += 5">Add 5</button>
        <button @click="value += 1">Add 1</button>
        <p>{{ result }}</p>
    </div>
    <div>
        <input type="text">
        <p>{{ value }}</p>
    </div>
</div>