如果提示EmaProxy构造错误，可以修改为：

[Brother-Simon]

window.EMA = new EmaProxy()
修改为：window.EMA = EmaProxy

[OSMeteor]

改了之后还是又这个错误

ema_proxy__WEBPACK_IMPORTED_MODULE_5___default.a is not a constructor
at eval (main.js?56d7:28)
at Module../src/main.js (index.js:12506)
at webpack_require (index.js:833)
at fn (index.js:130)
at Object.4 (index.js:12651)
at webpack_require (index.js:833)
at index.js:971
at index.js:974

[OSMeteor]

用 yarn 安装依赖 解决 保持node版本在10.一下