filters.js

var filters = {
  category1: {
    filter1: false,
    filter2: true
  },
  category2: {
    filter1: true,
    filter2: false
  }
}
  
var anyFilterApplied = false;
_.each(Object.keys(filters), function(category) {
  var categoryFilters = filters[category];
  _.each(Object.keys(categoryFilters), function(f) {
    if (categoryFilters[f] == 'true') {
      anyFilterApplied = true;
    }
  });
});