IE打开react项目空白页 不兼容 react-app-polyfill 使用配置

1.安装react-app-polyfill和core-js

npm i react-app-polyfill core-js --save

2.在src/index.js引入(需放在首行)

import 'core-js/es'  
import 'react-app-polyfill/ie9'  
import 'react-app-polyfill/stable'

3.修改package.json

"production": [
   ">0.2%",
   "not dead",
   "not op_mini all",
   "ie > 9"
 ],
 "development": [
   "last 1 chrome version",
   "last 1 firefox version",
   "last 1 safari version",
   "ie > 9"
 ]

4.重启项目即可
补充：如果没生效，删除node_modules目录, 重新下载