Rollup Error: 'isValidElementType' is not exported by node_modules/react-is/index.js

问题

I'm building a bundle with rollUp using styled-components.

My rollup.config.js looks like:

import resolve from 'rollup-plugin-node-resolve'
import babel from 'rollup-plugin-babel'
import commonjs from 'rollup-plugin-commonjs'
export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs'
  },
  external: [
    'react',
    'react-proptypes'
  ],
  plugins: [
    resolve({
      extensions: [ '.js', '.json', '.jsx' ]
    }),
    commonjs({
      include: 'node_modules/**'
    }),
    babel({
      exclude: 'node_modules/**'
    })
  ]
}

And I'm receiving

[!] Error: 'isValidElementType' is not exported by node_modules/react-is/index.js
https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module
node_modules/styled-components/dist/styled-components.es.js (7:9)
5: import stream from 'stream';
6: import PropTypes from 'prop-types';
7: import { isValidElementType } from 'react-is';
            ^
8: import hoistStatics from 'hoist-non-react-statics';

Checking on the node_modules itself react-is is a commonjs module as it can be checked out here as well.

Shouldn't the commonjs plugin take care of it since it is inside node_modules/** ?

Thanks.

回答1:

I resolved this by using the rollup-plugin-commonjs

and defining the export manually in the rollup config as below

export default {
  input: 'src/index.js',
  output: [
    {
      file: pkg.main,
      format: 'cjs',
      sourcemap: true
    },
    {
      file: pkg.module,
      format: 'es',
      sourcemap: true
    }
  ],
  plugins: [
    external(),
    postcss({
      modules: true
    }),
    url(),
    babel({
      exclude: 'node_modules/**'
    }),
    resolve(),
    commonjs({
      include: 'node_modules/**',
      namedExports: {
        'node_modules/react-is/index.js': ['isValidElementType']
      }
    })
  ]
}

After this everything worked fine.

and for the info, my initial setup was done through https://github.com/transitive-bullshit/react-modern-library-boilerplate

Hope it works for you

回答2:

The fix above didn't work for me. However, adding styled-components to the rollup.config.js list of externals and globals worked for me.

    export default {
      ...
      external: ['styled-components'],
      ...
      globals: { 'styled-components': 'styled' },
    };

I'm using the typescript create-react-library cli, which comes bundled with rollup.

https://github.com/styled-components/styled-components/issues/930

来源：https://stackoverflow.com/questions/50080893/rollup-error-isvalidelementtype-is-not-exported-by-node-modules-react-is-inde

标签

reactjs

rollup

styled-components