JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="mytext" cols="30" rows="3"></textarea>
<button id="button">Start Over?</button>

JavaScript

$(document).ready(function () {

    var lines = 2;

    $('#mytext').keydown(function (e) {
        newLines = $(this).val().split("\n").length;

        if (newLines > lines) {
            $("#mytext").prop('disabled', true);
        } else {
            $("#mytext").prop('disabled', false);
        }
    });
    $('#button').click(function () {
        $("#mytext").val('');
        $("#mytext").prop('disabled', false);
    });
});