const object = {
  website:'http://www.hao123.com',
  name:'好123',
};
export default object;

import constants from './constansts.js'
<Text>{constants.name}</Text>

export default {
  website:'http://www.hao123.com',
  name:'好123',
};

global.a = 1;
<Text>{a}</Text>

global.constants = {
  website:'http://www.baidu.com',
  name:'百度',
};

import './constants.js';
<Text>{global.constants.name}</Text>