如何在组件库中使用React挂钩？

我当前正在创建一个组件库，该组件库通过NPM链接包含在Nextjs项目中，并且很难使其始终如一地加载而不会出错。最新的是

无效的挂接调用。挂钩只能在功能组件的主体内部调用。可能由于以下原因之一而发生

这是一个Typescript组件，但据我所知，我所做的一切还可以，但是它不是在玩运动。这是代码：

        import React, { useEffect } from "react";
        import { FlagIcon } from "react-flag-kit";

        const LanguageSwitcher = () => {
            useEffect(() => {
                alert('Yo!');
            })
            return (
                <div className="w-full justify-end">
                    <button>
                        <div className="flex items-center">
                            <FlagIcon code="GB" /> <span className="block ml-2">English</span>
                        </div>
                    </button>
                </div>
            )
        }

        export default LanguageSwitcher

然后将其导入库中的另一个组件，然后导入Nextjs页面。错误在哪里显示。

I'm not sure if it's a webpack or typescript compiling issue, tried all the different targets I can think of, tried googling all sorts of things but nothing seems relevant to my situation. It might not even be a React issue but one with Typescript and Webpack, but my exposure to those is very new.

My webpack config:

        var path = require('path');
        module.exports = {
          entry: './src/index.ts',
          devtool: "source-map",
          output: {
            path: path.resolve(__dirname, 'build'),
            filename: 'index.js',
            libraryTarget: 'commonjs2'
          },
          module: {
            rules: [
              {
                test: /\.ts(x?)$/,
                use: 'ts-loader',
                exclude: /node_modules/,
              },
              {
                enforce: "pre",
                test: /\.js$/,
                loader: "source-map-loader"
              }
            ]
          },
          resolve: {
            extensions: [ '.tsx', '.ts', '.js' ],
          }
        };

My tsconfig.json

    {
      "compilerOptions": {
        "outDir": "build",
        "module": "esnext",
        "target": "es6",
        "lib": ["es6", "dom", "es2016", "es2017"],
        "sourceMap": true,
        "allowJs": false,
        "jsx": "react",
        "declaration": true,
        "moduleResolution": "node",
        "forceConsistentCasingInFileNames": true,
        "noImplicitReturns": true,
        "noImplicitThis": true,
        "noImplicitAny": true,
        "strictNullChecks": true,
        "suppressImplicitAnyIndexErrors": true,
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "allowSyntheticDefaultImports": true
      },
      "include": ["src"],
      "exclude": ["node_modules", "build"]
    }

Any pointers or help would be really appreciated!

I also tried reverting everything back to vanilla JS and the problem persists, so I think it might be webpack related?

Edit

Here is my full package.json file and also what Nextjs has

{
  "name": "some/package",
  "version": "1.0.0",
  "description": "",
  "main": "build/index.js",
  "scripts": {
    "test": "jest",
    "start": "webpack --watch --mode=development",
    "build": "webpack"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "react": "16.10.2",
    "webpack": "^4.41.1"
  },
  "devDependencies": {
    // ...
    "@types/react": "^16.9.5",
    "@types/react-dom": "^16.9.1",
    "react": "16.10.2",
    "react-dom": "^16.10.2",
    "ts-loader": "^6.2.0",
    "typescript": "^3.6.4",
    "webpack-cli": "^3.3.9"
  }
}

    "react": "16.10.2",
    "react-dom": "16.10.2"