JS 监听变量值变化

import BLETool from '../../utils/ble-tool.js'
  Object.defineProperty(BLETool, 'conState', {
        set: value => { //更新值的时候会触发
        
        }
      });
      BLETool.conState = 2;

ble-tool.js

export default {
  conState: -1, //销毁  0:未连接 1:正在连接  2:已连接
}