Reactjs &引用；react app polyfill“应用程序；不'；我不在IE11工作

我的React应用程序无法在IE 11上运行。
我的客户希望应用程序至少能在ie11上运行。
所以，我必须解决这个错误

我尝试了“react app polyfill”的官方文档。但它仍然不起作用。
请帮帮我

src/index.jsx

导入'react app polyfill/ie11'；
导入“react app polyfill/stable”；
从“React”导入React；
从“react dom”导入react dom；
导入“./index.css”；
从“./App”导入应用程序；
将*作为serviceWorker从“/serviceWorker”导入；
从'react redux'导入{Provider}；
从“./store”导入存储；
ReactDOM.render(
,
document.getElementById（'root'））
);
serviceWorker.unregister（）；

package.json

  "dependencies": {
    ...
    "@types/jest": "^24.0.25",
    "@types/node": "^12.12.24",
    "@types/react": "^16.9.17",
    "@types/react-dom": "^16.9.4",
    "@types/react-redux": "^7.1.5",
    "@types/react-router-dom": "^5.1.3",
    "axios": "^0.19.0",
    "install": "^0.13.0",
    "node-sass": "^4.13.0",
    "npm": "^6.13.4",
    "react": "^16.12.0",
    "react-app-polyfill": "^1.0.5",
    "react-dom": "^16.12.0",
    "react-hotkeys": "^2.0.0",
    "react-redux": "^7.1.3",
    "react-router": "^5.1.2",
    "react-router-dom": "^5.1.2",
    "react-scripts": "3.3.0",
    "redux": "^4.0.5",
    "redux-devtools-extension": "^2.13.8",
    "redux-thunk": "^2.3.0",
    "typescript": "^3.7.4"
  },
...
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "ie 11",
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }

.
.
"browserslist": {
  "production": [
    ">0.2%",
    "not dead",
    "not op_mini all"
  ],
  "development": [
    "last 1 chrome version",
    "last 1 firefox version",
    "last 1 safari version",
    "not dead" // new line
  ]
},
.
.

---

问题可能与

react scripts版本有关，您使用的是react scripts 3.3.0及更高版本。您可以检查package.json文件来验证它

GitHub中有一些线程报告此错误，您可以参考它们，例如：

作为一种解决方法，您可以尝试降级react脚本版本。据我所知，它仍然可以与
react一起工作-scripts@3.2.0
在
index.js
中添加
react-app-polyfill
后，它将适用于PROD-env，但您需要更新DEV-env的
浏览器列表
内
包.json

index.js

import 'react-app-polyfill/ie9';
import 'react-app-polyfill/stable';

import React from 'react';
import ReactDOM from 'react-dom';
.
.

package.json

  "dependencies": {
    ...
    "@types/jest": "^24.0.25",
    "@types/node": "^12.12.24",
    "@types/react": "^16.9.17",
    "@types/react-dom": "^16.9.4",
    "@types/react-redux": "^7.1.5",
    "@types/react-router-dom": "^5.1.3",
    "axios": "^0.19.0",
    "install": "^0.13.0",
    "node-sass": "^4.13.0",
    "npm": "^6.13.4",
    "react": "^16.12.0",
    "react-app-polyfill": "^1.0.5",
    "react-dom": "^16.12.0",
    "react-hotkeys": "^2.0.0",
    "react-redux": "^7.1.3",
    "react-router": "^5.1.2",
    "react-router-dom": "^5.1.2",
    "react-scripts": "3.3.0",
    "redux": "^4.0.5",
    "redux-devtools-extension": "^2.13.8",
    "redux-thunk": "^2.3.0",
    "typescript": "^3.7.4"
  },
...
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "ie 11",
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }

.
.
"browserslist": {
  "production": [
    ">0.2%",
    "not dead",
    "not op_mini all"
  ],
  "development": [
    "last 1 chrome version",
    "last 1 firefox version",
    "last 1 safari version",
    "not dead" // new line
  ]
},
.
.

在这里，他使用了3.4.3，这也适用于我