How to export and load the notes as a text some kind of file file (javascript) [duplicate]

document.getElementById('add-note').addEventListener('click', function() {
    var note = prompt('Enter your note:');
    if (note) {
        var li = document.createElement('li');
        li.textContent = note;
        document.getElementById('notes-list').appendChild(li);
    }
});

I am trying to make a note section for my webpage and i want to export the notes as a text or some kind of file and also load it back. This is offline.