JSFiddle - React, Tailwind, and code Playground

HTML

<textarea type='text' name="textarea" id='textarea'> </textarea><br/>
<span id="display"></span>

JavaScript

$(document).ready(function() {

    $('#textarea').keypress(function(e) {
        var display = $('#textarea').val();

        if (e.shiftKey === true) {
            if (e.which == 13) {
                //append a break 
                $('#textarea').append("<br/>");

            }

        } else {
            if (e.which == 13) {
                // submit to form using submit()                    
                $('span#display').html(display);

            }
        }
    });
});