React+Reduxをした時のwindowサイズの変更検知 ref: http://qiita.com/morizotter/items/db22f9f2507a65956bf9

index.js

export const changeScreenWidth = (width) => {
  return {
    type: 'CHANGE_SCREEN_WIDTH',
    screenWidth: width,
  };
};

SampleApp.js

const initialState = {
  ...
  screenWidth: window.innerWidth,
};

const sampleApp = (state = initialState, action) => {
  switch (action.type) {
    ...
    case 'CHANGE_SCREEN_WIDTH':
      return Object.assign({}, state, {
        screenWidth: action.screenWidth,
      });
    default:
      return state;
  }
};

export default sampleApp;