choices.js/assets/scripts/src/reducers/groups.js

A vanilla JS customisable text input/select box plugin

const groups = (state = [], action) => {
  switch (action.type) {
    case 'ADD_GROUP': {
      return [...state, {
        id: action.id,
        value: action.value,
        active: action.active,
        disabled: action.disabled,
      }];
    }

    case 'CLEAR_CHOICES': {
      return state.groups = [];
    }

    default: {
      return state;
    }
  }
};

export default groups;