app/views/cards/update.js.erb
console.log('<%= @card.id %>');
$('#edit_card_<%= @card.id %>').remove();
if ('<%= params['card']['front'] %>') {
$('.single-card[data-id=<%= @card.id %>] .front .text').text('<%= escape_javascript(params['card']['front']) %>');
$('.single-card[data-id=<%= @card.id %>] .back .text').text('<%= escape_javascript(params['card']['back']) %>');
}
$('.single-card[data-id=<%= @card.id %>]').show().removeClass('flip');