Coding rules

• indent: 2 spaces
• We rely on jQuery for DOM element manipulation and for declaring events
• An example is worth than thousand words:

// rotate triangle dropdown
function addRotateTriangleEvent(trackId) {
  $(".instrument-label").eq(trackId).click(function () {
    var trackId = $(this).parents('.instrument').index();
    $('.instrument').eq(trackId).find(".glyphicon").toggleClass('rotation');
  });
}