0_simpleFilter.js

// current
alight.filters.toString = function(exp, scope) {
  return function(val) {
    return val.toString()
  }
}

// new style
alight.filters.toString = function(val, exp, scope) {
    return val.toString()
}

1_fullFilter.js

// current
alight.filters.format = function(exp, scope, env) {
  var fn = scope.$compile(exp);
  return {
    watchMode: 'deep',
    onChange: function(value) {
      env.setValue(fn(value))
    },
    onStop: function(value) {}
  }
}

// new style
alight.filters.format = {
  watchMode: 'deep',
  init: function(exp, scope) {
    this.fn = scope.$compile(exp)
  },
  onChange: function(value) {
    this.setValue(this.fn(value))
  },
  onStop: function() {}
};