[ERR_REQUIRE_ESM]: Must use import to load ES Module

[missinglink]

Hi,

Apologies in advance if this is a node issue and not a geolib issue, I'm not familiar with this error message.

Up to and including node v12.10.0 we have had no issue loading this library using the syntax:

const geolib = require('geolib');

since nodejs version v12.11.0 we are getting the following error:

internal/modules/cjs/loader.js:958
      throw new ERR_REQUIRE_ESM(filename);
      ^
Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /home/travis/build/pelias/api/node_modules/geolib/lib/index.js
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:958:13)
    at Module.load (internal/modules/cjs/loader.js:798:32)
    at Function.Module._load (internal/modules/cjs/loader.js:711:12)
    at Module.require (internal/modules/cjs/loader.js:838:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/home/travis/build/pelias/api/controller/placeholder.js:4:16)
    at Module._compile (internal/modules/cjs/loader.js:945:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:962:10)
    at Module.load (internal/modules/cjs/loader.js:798:32)
    at Function.Module._load (internal/modules/cjs/loader.js:711:12)

[manuelbieh]

Oh that's an interesting one. Will check that.

[rapomon]

I have the same issue.

[rapomon]

I just test it with node 12.11.1 and works fine. It was a problem with node 12.11.0:
This release fixes a regression that prevented from building Node.js using the official source tarball (Richard Lau)
https://nodejs.org/en/blog/release/v12.11.1/

[niklv]

Have similar issue on node 13.

08:49:12.610 error: (node:6) Warning: require() of ES modules is not supported.
require() of /app/node_modules/geolib/lib/index.js from /app/src/index.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 index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /app/node_modules/geolib/package.json.

[missinglink]

Heya OP here, the originally reported issue was resolved in v12.11.1, sorry I should have closed it before that last comment came through...

[rapomon]

The same here, tested with node 13.1.0:

(node:10520) Warning: require() of ES modules is not supported.
require() of C:\nodejs\ebm-one\node_modules\geolib\lib\index.js from C:\nodejs\ebm-one\services\activities.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 index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from C:\nodejs\ebm-one\node_modules\geolib\package.json.

[peterboyer]

Quite blocked by this one on Node v12.11.0.
Seems like "type": "module" is just causing a hassle...

[missinglink]

@ptboyer did you read the thread above? this is a known issue with v12.11.0 which was resolved in v12.11.1

[manuelbieh]

Yeah. Try upgrading your Node to v12.11.1. That should fix it!