将使用TypeScript编写的React组件发布到npm，但是在导入时未定义

编程问答 2022-06-03

问题描述

我试图将用TypeScript编写的自己的react组件发布到npm。我成功地发布了它，但是当我创建一个新的react项目并导入我构建的npm包时，发生了一些错误：

错误：元素类型无效：预期为字符串（对于内置 组件）或类/函数（用于复合组件），但得到： 未定义。您可能忘记了从文件中导出组件 是在其中定义的，或者您可能混淆了默认导入和命名导入。

error image

但是我确信我没有滥用命名的出口和默认出口。 因此，我认为我的webpack配置或tsconfig可能有问题。

我的webpack.config.json 

const path = require('path');

module.exports = {
  mode: 'none',entry: path.join(__dirname,'src','index.tsx'),target: 'web',resolve: {
    extensions: ['.ts','.tsx','.js','.jsx','.css']
  },module: {
    rules: [
      {
        test: /\.(ts|tsx)$/,use: "babel-loader",exclude: '/node_modules/',},{
        test: /\.(ts|tsx)$/,use: 'awesome-typescript-loader',exclude: '/node_modules/'
      },{
        test: /\.css$/i,use: ['style-loader','css-loader'],],output: {
    filename: 'index.js',path: path.resolve(__dirname,'dist')
  }
}

我的tscongig.json 

{
  "compilerOptions": {
    "outDir": "./dist","target": "es6","module": "commonjs","skipLibCheck": true,"allowSyntheticDefaultImports": true,"noImplicitAny": false,"strictnullchecks": false,"removeComments": true,"declaration": true,"declarationMap": true,"sourceMap": true,"isolatedModules": true,"esModuleInterop": true,"jsx": "react","typeRoots": [
      "dist/index.d.ts","node_modules/@types"
    ]
  },"include": [
    "./src/*","exclude": [
    "node_modules","dist"
  ]
}

package.json 

{
  "name": "myname","version": "1.0.42","description": "some text","main": "dist/index.js","types": "dist","scripts": {
    "build": "webpack --config webpack.config.js --mode production"
  },"repository": {
    "type": "git","url": "some url"
  },"author": "secret","license": "MIT","dependencies": {},"devDependencies": {
    "@babel/core": "^7.12.3","@babel/preset-env": "^7.12.1","@babel/preset-react": "^7.12.1","@babel/preset-typescript": "^7.12.1","@types/react": "^16.9.53","@types/react-dom": "^16.9.8","@types/webpack": "^4.41.23","awesome-typescript-loader": "^5.2.1","babel-loader": "^8.1.0","css-loader": "^5.0.0","react": "^17.0.1","react-dom": "^17.0.1","style-loader": "^2.0.0","typescript": "^4.0.3","webpack": "^5.2.0","webpack-cli": "^4.1.0"
  }
}

和我的入口点index.tsx 

import someComponent from './someComponent';

export { someComponent };

并且我确定someComponent是从其他文件默认导出的。

有人可以帮我解决这个问题吗？

解决方法

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npmnpmnpm-publishreactjsreactjstypescripttypescriptwebpackwebpackwebpack