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Babel runtime dependency will crash node (esm modules)

See original GitHub issue

Issue

Running tests without any transpilation with nodejs will lead to issues with react-flow v9+. This wasn’t the case before.

Reproduce

Repository with steps how to reproduce this issue: https://github.com/andys8/react-flow-node-issue-example

Error

internal/modules/cjs/loader.js:1092
      throw new ERR_REQUIRE_ESM(filename, parentPath, packageJsonPath);
      ^

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /home/user/dev/repository/react-flow-node-issue-example/node_modules/@babel/runtime/helpers/esm/extends.js
require() of ES modules is not supported.
require() of /home/user/dev/repository/react-flow-node-issue-example/node_modules/@babel/runtime/helpers/esm/extends.js from /home/user/dev/repository/react-flow-node-issue-example/node_modules/react-flow-renderer/dist/ReactFlow.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename extends.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /home/user/dev/repository/react-flow-node-issue-example/node_modules/@babel/runtime/helpers/esm/package.json.

    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:13)
    at Module.load (internal/modules/cjs/loader.js:940:32)
    at Function.Module._load (internal/modules/cjs/loader.js:781:14)
    at Module.require (internal/modules/cjs/loader.js:964:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.<anonymous> (/home/user/dev/repository/react-flow-node-issue-example/node_modules/react-flow-renderer/dist/ReactFlow.js:6:1)
    at Module._compile (internal/modules/cjs/loader.js:1075:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1096:10)
    at Module.load (internal/modules/cjs/loader.js:940:32)
    at Function.Module._load (internal/modules/cjs/loader.js:781:14) {
  code: 'ERR_REQUIRE_ESM'
}
npm ERR! Test failed.  See above for more details.

Issue Analytics

State:
Created 3 years ago
Reactions:1
Comments:7 (6 by maintainers)

Top GitHub Comments

2reactions

moklickcommented, Feb 25, 2021

This is really strange. We haven’t change the babel plugins or the rollup config. The problem is that these packages are required by the current production build:

require('@babel/runtime/helpers/esm/extends');
require('@babel/runtime/helpers/esm/objectWithoutPropertiesLoose');

In v8.8.0 the weren’t. Maybe there is a new option for one of the babel or rollup plugins. I will try to fix it.

Note: This issue occurs since we are importing react-redux.

1reaction

andys8commented, Feb 26, 2021

Awesome, the issue is fixed. Great work!

https://github.com/andys8/react-flow-node-issue-example/blob/master/README.md#update-issue-fixed

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