Python101/addnode.html at master · wojtekidd/Python101 · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Adding nodes to dome - to-do list</title>
    <script>
        document.addEventListener('DOMContentLoaded', () => {
            document.querySelector('#new-task').onsubmit = () => {
                let newTask = document.querySelector("#task").value;

                if (newTask === '') {
                    alert ("Input can't be empty");
                    return false;
                }

                const li = document.createElement('li');
                li.innerHTML = newTask;

                document.querySelector('#tasks').append(li);

                document.querySelector('#task').value = '';
                return false;
            }});
    </script>
</head>
<body>
<h1>Todo list</h1>
<form id="new-task">
    <input id="task" type="text">
    <input type="submit">
</form>
<ul id="tasks"</ul>
</body>
</html>