Question

我正在开发一个项目（Next.js版本8.1.0），并且想升级到9.2版。我将Next.js版本更改为9.2，并且遇到了这个问题：

TypeError：如果没有“ new”，则无法调用类构造函数App 在新的MyApp（/home/node/app/src/.next/server/static/development/pages/_app.js:4384:191）在processChild上（/home/node/app/node_modules/react-dom/cjs/react-dom-server.node.development.js:2995:14）在解决时（/home/node/app/node_modules/react-dom/cjs/react-dom-server.node.development.js:2960:5）在ReactDOMServerRenderer.render（/home/node/app/node_modules/react-dom/cjs/react-dom-server.node.development.js:3435:22）在ReactDOMServerRenderer.read（/home/node/app/node_modules/react-dom/cjs/react-dom-server.node.development.js:3373:29）在renderToString（/home/node/app/node_modules/react-dom/cjs/react-dom-server.node.development.js:3988:27）在渲染时（/home/node/app/node_modules/next/dist/next-server/server/render.js:81:16）在renderPage（/home/node/app/node_modules/next/dist/next-server/server/render.js:346:16）在Object.ctx.renderPage（/home/node/app/src/.next/server/static/development/pages/_document.js:2266:26）在Function.getInitialProps（/home/node/app/src/.next/server/static/development/pages/_document.js:1515:19）在_callee $（/home/node/app/src/.next/server/static/develop/pages/_document.js:2282:77）在tryCatch（/home/node/app/src/.next/server/static/development/pages/_document.js:428:40）在Generator.invoke [作为_invoke]（/home/node/app/src/.next/server/static/development/pages/_document.js:654:22）在Generator.prototype。（匿名函数）[下一个]（/home/node/app/src/.next/server/static/development/pages/_document.js:480:21）在asyncGeneratorStep（/home/node/app/src/.next/server/static/develop/pages/_document.js:124:24）在_next（/home/node/app/src/.next/server/static/development/pages/_document.js:146:9）

这是我的next.config.js：

    const withSass = require('@zeit/next-sass');
const { resolve } = require('path');

let baseUrl = process.env.BASE_URL;
baseUrl = baseUrl && baseUrl.length && '/' !== baseUrl ? baseUrl : '';

module.exports = withSass({
  transpileModules: ['file-type'],
  webpack(config, options) {
    config.module.rules.push({
      test: /\.tsx?$/,
      use: [
        {
          loader: 'babel-loader',
          options: {
            configFile: resolve('babel.config.js'),
          },
        },
        {
          loader: 'ts-loader',
          options: {
            // disable type checker - we will use it in fork plugin
            transpileOnly: true,
          },
        },
      ],
    });
    config.module.rules.push({
      test: /node_modules\/file-type/,
      use: [
        {
          loader: 'babel-loader',
          options: {
            configFile: resolve('babel.config.js'),
            exclude: /node_modules\/(?!(file-type))/,
            include: /node_modules\/file-type/,
            sourceType: 'unambiguous',
          },
        },
      ],
    });

    config.resolve.extensions.push('.ts');
    config.resolve.extensions.push('.tsx');
    config.resolve.extensions.push('.jsx');
    /* if (options.isServer) {
      config.plugins.push(new ForkTsCheckerWebpackPlugin({ tsconfig: resolve('./tsconfig.json') }));
    } */

    return config;
  },
  pageExtensions: ['jsx', 'tsx'],
  cssModules: true,
  cssLoaderOptions: {
    importLoaders: 1,
    localIdentName: '[local]___[hash:base64:5]',
  },
  sassLoaderOptions: {
    includePaths: [resolve('src/scss')],
  },
  webpackDevMiddleware: config => {
    if (process.env.ENABLE_WATCH_POLL) {
      const watchOptions = {
        poll: true,
        aggregateTimeout: 500,
        ignored: [
          '.git/**',
          'src/.next/**',
          '**/__tests__/**',
          '.scannerwork/**',
          'cypress/**',
          'doc/**',
          'node_modules/**',
          'src/static/**',
        ],
      };
      return { ...config, watch: true, watchOptions };
    }
    return config;
  },
  publicRuntimeConfig: {
    env: process.env.APP_ENV,
    nodeEnv: process.env.NODE_ENV,
    apiProxy: process.env.API_PROXY,
    subscriptionKey: process.env.OCP_APIM_SUBSCRIPTION_KEY,
    apiEndpoint: process.env.API_ENDPOINT,
    serverPort: process.env.SERVER_PORT,
    gmapApiendpoint: process.env.GMAP_API_KEY,
    gigyaApiKey: process.env.GIGYA_API_KEY,
    gigyaDatacenter: process.env.GIGYA_DATACENTER,
    templateReimbursementLink: process.env.TEMPLATE_REIMBURSEMENT_LINK,
    reimbursementStatusLink: process.env.REIMBURSEMENT_STATUS_LINK,
    gtmId: process.env.GTM_ID,
    captchaSiteKey: process.env.CAPTCHA_SITE_KEY,
    baseUrl,
    redisPort: process.env.REDIS_PORT,
    redisHost: process.env.REDIS_HOST,
    redisPassword: process.env.REDIS_PASSWORD,
  },
});

Answer 1

从comment in the GitHub issue you also have commented on中说，要从babel-loader中删除next.config.js，因为Next.js已经包含了它。

TypeError：类构造函数文档不能在没有“ new”的情况下调用

1 个答案: