How to access current card id in Trello API

Question

How can I programmatically get the currently displayed card id?

Looking through the Trello API documentation and in particular at the t.card() call, I'm left wondering if there is further documentation somewhere better describing the allowed fields. According to the snippet the link provides, the first parameter should be id, yet in the example it calls a string 'all'. Is 'all' some kind of keyword that represents all cards in a board? Is there a keyword for 'thiscard' or something similar?

All the other calls seems to require a card ID already, so I seem to be in a catch 22.

I'd eventually like to use this ID to create a checklist but this also requires a card ID.

Answer 1

Use the following code snippet to get the card id.

/* global TrelloPowerUp */

var t = TrelloPowerUp.iframe();
t.card('id')
    .then(function (name) {
        console.log(name);
});

Answer 2

While I feel the above answer, gives some context. I went about a different way to solve it.

TrelloPowerUp.initialize({
    'card-buttons': function(t, options) {
    return[{
      icon: BLACK_ROCKET_ICON,
      text: 'Track this',
      callback: function(t){
        return t.card('id').then(card=>alert(card.id))

My code works at the initialization of powerup.