JavaScript/tasks.html at main · AnshumanSinghh/JavaScript · GitHub

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<!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">
    <title>Tasks</title>
    <script>
        document.addEventListener('DOMContentLoaded', function() {

            // by default, the submit button is disabled
            document.querySelector('#submit').disabled = true;

            document.querySelector('#task').onkeyup = () => {
                if (document.querySelector('#task').value.length > 0){
                    document.querySelector('#submit').disabled = false;
                }
                else{
                    document.querySelector('#submit').disabled = true;
                }
            }

            document.querySelector('form').onsubmit = () => {
                const task = document.querySelector('#task').value;
                console.log(task);

                // to create li tag: <li> </li>
                const li = document.createElement("li");
                li.innerHTML = task; // now the text inside of the li tag should be task that user enters.

                // to add or say append the created HTML element or tag, here it is li tag.
                document.querySelector('#tasks').append(li);

                // to set balnk the input field of input tag after form submission. So that it doesn't contain the previous input.
                document.querySelector('#task').value = "";
                document.querySelector('#submit').disabled = true;

                // to stop form from submitting return false
                return false;
            }
        });
    </script>
</head>
<body>
    <h1>Tasks!</h1>
    <ul id="tasks">
    </ul>
    <form>
        <input id="task" type="text" name="name">
        <input id="submit" type="submit">
    </form>
</body>
</html>