Function mergeAnimationOptions

lib/test/angular/1.4.3/angular-animate.js:175–195

(element, target, newOptions)

}

function mergeAnimationOptions(element, target, newOptions) {
  var toAdd = (target.addClass || '') + ' ' + (newOptions.addClass || '');
  var toRemove = (target.removeClass || '') + ' ' + (newOptions.removeClass || '');
  var classes = resolveElementClasses(element.attr('class'), toAdd, toRemove);

  extend(target, newOptions);

  if (classes.addClass) {
    target.addClass = classes.addClass;
  } else {
    target.addClass = null;
  }

  if (classes.removeClass) {
    target.removeClass = classes.removeClass;
  } else {
    target.removeClass = null;
  }

  return target;
}

function resolveElementClasses(existing, toAdd, toRemove) {
  var ADD_CLASS = 1;