如果你的图片在公共文件夹中，那么你应该使用

"/images/logo_2016.png"

在<img> SRC中，而不是导入

'../../public/images/logo_2016.png'; 

这是可行的

<img className="Header-logo" src="/images/logo_2016.png" alt="Logo" />

有一些答案提供了react-app-rewired的解决方案，但customize-cra包括一个removeModuleScopePlugin() API，它更优雅一些。(这是相同的解决方案，但被customize-cra包抽象了。)

NPM I——save-dev react-app-rewired customize-cra

package.json

"scripts": {
    - "start": "react-scripts start"
    + "start": "react-app-rewired start",
    ...
},

config-overrides.js

const { removeModuleScopePlugin } = require('customize-cra')

module.exports = removeModuleScopePlugin()

如果您只需要导入单个文件，如README。Md或package。json，那么它可以显式地添加到ModuleScopePlugin()

配置/ paths.js

const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
module.exports = {
  appPackageJson: resolveApp('package.json'),
  appReadmeMD:    resolveApp('README.md'),
};

Config /webpack.config.dev.js + Config /webpack.config.prod.js

module.exports = {
  resolve: {
    plugins: [
      // Prevents users from importing files from outside of src/ (or node_modules/).
      // This often causes confusion because we only process files within src/ with babel.
      // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
      // please link the files into your node_modules/ and let module-resolution kick in.
      // Make sure your source files are compiled, as they will not be processed in any way.
      new ModuleScopePlugin(paths.appSrc, [
          paths.appPackageJson,
          paths.appReadmeMD         // README.md lives outside of ./src/ so needs to be explicitly included in ModuleScopePlugin()
      ]),
    ]
  }
}

再加上Bartek Maciejiczek的回答，下面是Craco的情况:

const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin");
const path = require("path");

module.exports = {
  webpack: {
    configure: webpackConfig => {
      webpackConfig.resolve.plugins.forEach(plugin => {
        if (plugin instanceof ModuleScopePlugin) {
          plugin.allowedFiles.add(path.resolve("./config.json"));
        }
      });
      return webpackConfig;
    }
  }
};

我之前的解决方案适用于Webpack 4，但不适用于Webpack 5。在浏览了从那时起积累的解决方法之后，我发现下面的方法非常简单(而且似乎是可扩展的)。

import { CracoAliasPlugin } from 'react-app-alias';

const cracoConfig = {
  plugins: [
    {
      plugin: CracoAliasPlugin,
      options: {
        alias: { '~': './' },
      },
    },
  ],
}

然后像这样导入:

import whatever from '~/<path-to-file>';

此限制确保所有文件或模块(导出)都在src/目录中，实现在./node_modules/react-dev-utils/ModuleScopePlugin.js中，在以下代码行中。

// Resolve the issuer from our appSrc and make sure it's one of our files
// Maybe an indexOf === 0 would be better?
     const relative = path.relative(appSrc, request.context.issuer);
// If it's not in src/ or a subdirectory, not our request!
     if (relative.startsWith('../') || relative.startsWith('..\\')) {
        return callback();
      }

您可以通过

修改这段代码(不推荐) 或者执行eject，然后从目录中删除ModuleScopePlugin.js。 const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');从。/ node_modules / react-scripts / config / webpack.config.dev.js

PS:注意弹出的后果。

在制作《Truffle》时，我不得不克服同样的问题。解决方案如下:

由于Create-React-App的默认行为不允许从src文件夹外导入文件，我们需要将build文件夹中的合同带到src内。我们可以在每次编译合同时复制并粘贴它们，但更好的方法是简单地配置Truffle将文件放在那里。

在“truffle-config.js”文件中，替换如下内容:

const path = require("path");

module.exports = {
  contracts_build_directory: path.join(__dirname, "client/src/contracts")
};

我不知道这是否对你有帮助，但我知道当我在Truffle中遇到同样的问题时，我发现了你的问题，这可能会帮助其他人。