Vue Js Add Zero '0' to Single Digit

<!DOCTYPE html>
<html>

<body>
    <div id="app">
        <h3>Vue Js Add Zero to Single Digit</h3>
        <input v-model="numInput" type="number">
        <button @click="addZeroPadding">Add Zero Padding</button>
        <p v-if="paddedNum">{{ paddedNum }}</p>
    </div>

app.mount('#app')
    </script>
    <style scoped>
        #app {
            background-color: #f7f7f7;
            padding: 20px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }

h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

input {
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1.2rem;
            margin-right: 10px;
        }

button {
            background-color: #3498db;
            color: #fff;
            border: none;
            padding: 10px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1.2rem;
        }

p {
            font-size: 1.2rem;
            margin-top: 10px;
        }
    </style>
</body>

</html>