How to resolve 'undefined Module' error when loading npm package in NodeJS app

JustinBridwell2 — Mon, 24 Aug 2020 00:04:06 GMT

I am trying to load a module called 'geojson2h3' in my `NodeJS` app with the arcgis api for javascript methods to render the hexagons with the h3 spatial index. After running `npm install geojson2h3` into my node_modules folder, I tried following the initial code instructions given in `Github` to test it out:

import geojson2h3 from 'geojson2h3';

const polygon = {
type: 'Feature',
geometry: {
type: 'Polygon',
coordinates: [
[
[-122.47485823276713, 37.85878356045377],
[-122.47504834087829, 37.86196795698972],
[-122.47845104316997, 37.86010614563313],
[-122.47485823276713, 37.85878356045377]
]
]
}
};

const hexagons = geojson2h3.featureToH3Set(polygon, 10);
// -> ['8a2830855047fff', '8a2830855077fff', '8a283085505ffff', '8a283085506ffff']

const feature = geojson2h3.h3SetToFeature(hexagons);
// -> {type: 'Feature', properties: {}, geometry: {type: 'Polygon', coordinates: [...]}}

This method throws a `SyntaxError: Cannot use import statement outside a module` error. I then tried using the `NodeJS require` method as such: `const geojson2h3 = require('geojson2h3');`, replacing the `import` statement. This throws an `Uncaught Error: undefinedModule` error. The package shows in my `package.json` filer. What did I do wrong here?

topic How to resolve 'undefined Module' error when loading npm package in NodeJS app in ArcGIS JavaScript Maps SDK Questions

How to resolve 'undefined Module' error when loading npm package in NodeJS app