Vue Js Replace Space with Underscore

<html>
<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <h3>Vue Js Replace Space with Underscore</h3>
        <label for="userInput">Enter a string:</label>
        <input id="userInput" v-model="userString">
        <p>{{ modifiedString }}</p>
    </div>
    <script type="module">
        const app = new Vue({
            el: "#app",
            data() {
                return {
                    userString: "Replace Space with Underscore",
                };
            },
            computed: {
                modifiedString() {
                    return this.userString.replace(/\s+/g, "_");
                },
            },
        })
    </script>
    <style>
        #app {
            max-width: 600px;
            margin: 0 auto;
            padding: 20px;
            background-color: #fff;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            border-radius: 5px;
        }

label {
            font-size: 1.2rem;
            font-weight: bold;
        }

input {
            display: block;
            width: 100%;
            padding: 10px;
            margin-bottom: 20px;
            font-size: 1.2rem;
            border: 1px solid #ccc;
            border-radius: 5px;
        }

p {
            font-size: 1.2rem;
            line-height: 1.5;
            margin-bottom: 20px;
        }
    </style>
</body>

</html>