index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>CustomSelect</title>
</head>
<body>
    <!-- Option in original Select must match div.option in div.options -->
    
    <div class="select_body" id="frist"> <!-- In custom select must be original select and .select must have a unique id -->
        <select class="input" name="" id="nameOriginalSelect">
            <option value="1">Value1</option>
            <option value="2">Value2</option>
            <option value="3">Value3</option>
            <option value="4">Value4</option>
            <option value="5">Value5</option>
        </select>
        <div class="select"> <!-- Button for open options -->
            <p></p> <!-- The selected value will be written here -->
            <p>▼</p>
        </div>
        <div class="options" id="nameOps"> <!-- Options -->
            <p class="option option0">Value1</p> <!-- Number in the end need to props checks in original select(Count must start from 0) -->
            <p class="option option1">Value2</p>
            <p class="option option2">Value3</p>
            <p class="option option3">Value4</p>
            <p class="option option4">Value5</p>
        </div>
    </div>

    <script src="https://code.jquery.com/jquery-3.6.0.slim.min.js"></script>
    <script src="script.js"></script>
</body>
</html>