dashboard_labels.js

//Called when we have loaded the labels for a board
var loadedLabels = function(labels) {
  $.each(labels, function(index, label) {
    var label = $("<p><span class='badge' style='background:" + label.color + ";'>" + label.uses + "</span> " + label.name + "</p>");
    $('#labels').append(label)
  });
};

//Listen to changes to the boards selector
$('#boards').change(function() {
  var boardId = $("option:selected", this).val();
  $('#labels').empty();
  
  Trello.get(
    '/boards/' + boardId + '/labels',
    loadedLabels,
    function() { console.log("Failed to load labels"); }
  );
});