1、安装react-app-polyfill
cnpm i react-app-polyfill -S
2、在项目入口的index.js —— ./src/index.js 的顶部添加以下代码
import 'react-app-polyfill/ie9';
import 'react-app-polyfill/ie11';
import 'react-app-polyfill/stable';
3、在package.json配置 browserslist 项
"browserslist": {
"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"
]
}
以上