'TypeError: fs.existsSync不是一个函数‘React项目中发生的错误与'./node_modules/node-sass/lib/binding.js’有关。‘

Question

所以我已经尝试了一段时间了，现在我已经到了极限了。

我正在尝试创建一个react应用程序来进行简单的API调用，但是我一直收到这个错误，它阻止了我的lodable组件被呈现。

它作为我登录到chrome的console.log()的props.error出现。

在chrome的控制台中，我得到：

TypeError: fs.existsSync is not a function
at Object.hasBinary (extensions.js:404)
at module.exports (binding.js:11)
at Object.<anonymous> (index.js:14)
at Object../node_modules/node-sass/lib/index.js (index.js:471)
at __webpack_require__ (bootstrap:772)
at fn (bootstrap:141)
at Object../src/routes/app/routes/tacas/components/FeatureCallouts.js (lib sync:9)
at __webpack_require__ (bootstrap:772)
at fn (bootstrap:141)
at Object../src/routes/app/routes/tacas/components/template.js (styles.scss?8f6b:45)
at __webpack_require__ (bootstrap:772)
at fn (bootstrap:141)
at Object../src/routes/app/routes/tacas/index.js (index.js:1)
at __webpack_require__ (bootstrap:772)
at fn (bootstrap:141)

我认为这与'./node_modules/node-sass/lib/binding.js‘文件有关，该文件是：

/*!
 * node-sass: lib/binding.js
 */

var errors = require('./errors');

/**
 * Require binding
 */
module.exports = function(ext) {
  if (!ext.hasBinary(ext.getBinaryPath())) {
    if (!ext.isSupportedEnvironment()) {
      throw new Error(errors.unsupportedEnvironment());
    } else {
      throw new Error(errors.missingBinary());
    }
  }

  return require(ext.getBinaryPath());
};

同样在build CMD终端中，我也收到了这样的警告：

./node_modules/node-sass/lib/binding.js
19:9-37 Critical dependency: the request of a dependency is an expression

我看过其他类似的问题，但似乎都不适合我。例如，我根本没有webpack.config文件。

以防万一这里是我的package.json文件：

{
  "name": "material",
  "private": true,
  "version": "4.0.0",
  "main": "",
  "homepage": "",
  "scripts": {
    "start": "react-app-rewired start",
    "stop": "taskkill -F -IM node.exe",
    "build": "react-app-rewired build",
    "test": "react-app-rewired test --env=jsdom",
    "eject": "react-scripts eject",
    "prettier": "prettier --write ./src/**/**/**/*"
  },
  "dependencies": {
    "@babel/runtime": "7.0.0-beta.55",
    "@material-ui/core": "^1.5.1",
    "@material-ui/icons": "^2.0.2",
    "@material-ui/lab": "^1.0.0-alpha.10",
    "axios": "^0.19.2",
    "classnames": "^2.2.6",
    "core-js": "^2.5.7",
    "date-fns": "2.0.0-alpha.7",
    "downshift": "^2.1.1",
    "echarts": "^4.1.0",
    "echarts-for-react": "^2.0.14",
    "element-resize-event": "^2.0.9",
    "font-awesome": "~4.7.0",
    "history": "^4.6.1",
    "jquery": "^3.4.1",
    "jquery-slimscroll": "~1.3.8",
    "material-ui-pickers": "1.0.0-rc.11",
    "prop-types": "^15.6.2",
    "rc-queue-anim": "^1.6.5",
    "react": "^16.4.2",
    "react-dom": "^16.4.2",
    "react-hot-loader": "^4.3.4",
    "react-loadable": "^5.5.0",
    "react-redux": "^5.0.7",
    "react-router": "^4.3.1",
    "react-router-dom": "^4.3.1",
    "react-router-redux": "5.0.0-alpha.6",
    "react-scripts": "2.0.0-next.3e165448",
    "redux": "^4.0.0",
    "redux-immutable-state-invariant": "^2.1.0",
    "redux-thunk": "^2.3.0"
  },
  "browserslist": {
    "development": [
      "last 2 chrome versions",
      "last 2 firefox versions",
      "last 2 edge versions"
    ],
    "production": [
      ">0.25%",
      "not op_mini all",
      "ie 11"
    ]
  },
  "devDependencies": {
    "bootstrap": "^4.4.1",
    "node-sass": "^4.13.1",
    "prettier": "^1.14.2",
    "react-app-rewire-provide-plugin": "^1.0.0",
    "react-app-rewired": "^1.5.2",
    "sass-loader": "^7.0.1"
  }
}

请帮帮忙，我是一名实习生，这是我得到的第一个项目，我不想把它搞砸。

Answer 1

当我输入时，VS代码自动从node-sass导入TRUE，因此在文件中添加了import {TRUE} from 'node-sass'，这导致了这个错误。移除它解决了问题。

Answer 2

VS代码自动导入Null，就像@SadAzzi Answer一样，删除它对我来说一切都很有吸引力。

import { NULL } from "node-sass"；

Answer 3

Node-sass是一个原生C++模块，不能在浏览器中运行。有可能，但我从来没试过