index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Taskn</title>
    <link rel="stylesheet" href="styles.css">
    <script src="https://kit.fontawesome.com/9783530849.js" crossorigin="anonymous"></script>
</head>

<body>
    <div id="inputbox">
        <h1 id="tHeader">TASK<span id='sLett'>N</span></h1>
        <p class="p1">Organize Your Day</p>
        <div>
            <div id="inputs">
                <input id="toDo" type="text" placeholder="Eg: Learn JavaScript" value="Learn JavaScript" required>
                <input id="taskDate" type="date" min="" value="" required>
            </div>
            <button id="smbtn">Submit</button><br>
            <span id="message"></span>
        </div>
    </div>
    <br>
    <div id='todoList'>
        <div class='output'>
            <h3 class="taskHeader">You have not added any task yet!</h3>
            <ul id="probody"></ul>
            <div id="lists"></div>


            <div id='completedList'>
                <h3 id="completedHeader">Completed</h3>
                <ul id="completedbody"></ul>
            </div>

            <div id="clearBox"><button id="clear">Clear List</button></div>
        </div>
    </div>
    <script src="index.js"></script>
</body>

</html>