JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Phone Number Slider</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>

    <div class="ad"><a href="https://rubi.me/phone-number-slider/">rubi.me</a></div>

    <div class="slider-container">
        <input 
            type="range" 
            id="phone-slider" 
            min="0" 
            max="9999999999" 
            step="1" 
            value="0" 
            oninput="updatePhoneNumber(this.value)">
        <div class="number-display">
            <span id="phone-number">0000000000</span>
        </div>

    </div>
    

    <script src="script.js"></script>
</body>
</html>

CSS

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f9f9f9;
}

.slider-container {
    text-align: center;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 300px;
}

input[type="range"] {
    width: 100%;
    margin: 20px 0;
    -webkit-appearance: none;
    background: #ddd;
    height: 5px;
    border-radius: 5px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #007bff;
    border-radius: 50%;
    cursor: pointer;
}

.number-display {
    font-size: 1.5em;
    color: #333;
    font-weight: bold;
}
.ad{
  margin-top:350px
}

JavaScript

function updatePhoneNumber(value) {
  const phoneNumberDisplay = document.getElementById("phone-number")
  phoneNumberDisplay.textContent = value.padStart(10, "0")
}