为什么我可以构建我的 react 应用程序但无法启动它答案

【问题标题】：Why I can build my react app but cannot start it为什么我可以构建我的 react 应用程序但无法启动它
【发布时间】：2021-10-24 12:07:10
【问题描述】：

将rehype-katex从5.0.0升级到6.0.1后，当我运行yarn start时，我得到了：

./node_modules/hast-util-to-text/index.js 363:65
Module parse failed: Identifier directly after number (363:65)
File was processed with these loaders:
 * ./node_modules/react-scripts/node_modules/babel-loader/lib/index.js
You may need an additional loader to handle the result of these loaders.
|     //     break is the zero-width space character (U+200B), then the break is
|     //     removed, leaving behind the zero-width space.
>     if (lines[index].charCodeAt(lines[index].length - 1) === 0x20_0b
|     /* ZWSP */
|     || index < lines.length - 1 && lines[index + 1].charCodeAt(0) === 0x20_0b

但在codesandbox 中可以正常工作，yarn build 也可以。我该如何解决这个问题？

我的 package.json：

{
  "name": "blog",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@material-ui/core": "^4.12.3",
    "@material-ui/icons": "^4.11.2",
    "@testing-library/jest-dom": "^5.14.1",
    "@testing-library/react": "^12.0.0",
    "@testing-library/user-event": "^13.2.1",
    "gh-pages": "^3.2.3",
    "pubsub-js": "^1.9.3",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-helmet": "^6.1.0",
    "react-markdown": "^7.0.0",
    "react-router-dom": "^5.2.0",
    "react-scripts": "4.0.3",
    "react-syntax-highlighter": "^15.4.4",
    "rehype-katex": "^6.0.1", // Upgrade
    "rehype-raw": "^6.0.0",
    "remark-gfm": "^2.0.0",
    "remark-math": "^5.0.0",
    "web-vitals": "^2.1.0"
  },
  "scripts": {
    "predeploy": "npm run build",
    "deploy": "gh-pages -d build",
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "homepage": "https://xxx.github.io"
}

操作系统：Linux
纱线：v1.22.11
nodejs: v16.6.2

【问题讨论】：

标签： node.js reactjs yarnpkg

【解决方案1】：

如果我不得不猜测，我会说 REMOVE node_modules & package-lock.json 或 yarn.lock THEN yarn AGAIN。

有时升级模块会导致未知错误。

【讨论】：

我第一次尝试，但它不起作用?。
哦不，如果问题仍然困扰着您并且没有人给出正确的答案。也许你应该尝试在rehype-katex 中打开一个问题

【解决方案2】：

我遇到了完全相同的问题，并通过以下 SO POST 解决了该问题：https://stackoverflow.com/a/67574280/16766691

只要去你的项目根目录下的 package.json，

替换

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

与

  "browserslist": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ]

然后重新编译你的项目。

【讨论】：

非常感谢您的解决方案，我已经通过迁移到 next.js 解决了（？）这个问题。?

【解决方案3】：

我遇到了同样的错误，而且我花了比我愿意承认的时间更长的时间来找到它的原因。对我来说，它是数字文字中的下划线。

num = 2_000; // bad bad not good
num = 2000; // no probs

【讨论】：