Angular 19 build error with exports

Question

Hi,

Since updating to Angular 19, we get a build error regarding exports from within the @ArcGIS/core package.

node_modules/@arcgis/core/intl.d.ts:4:1 - error TS1203: Export assignment cannot be used when targeting ECMAScript modules. Consider using 'export default' or another module format instead.

4 export = intl;
~~~~~~~~~~~~~~
node_modules/@arcgis/core/geometry/projection.d.ts:4:1 - error TS1203: Export assignment cannot be used when targeting ECMAScript modules. Consider using 'export default' or another module format instead.

4 export = projection;

Package version of @angular is 19, errors happen on both `@arcgis/core` version 4.28.10 and version 4.31.6.

JavidYousaf · Answer

Hi @AndyGup I tried my application this morning and it worked - I still had the skipLibCheck enabled in tsconfig.json:

"skipLibCheck" = true

I think restating the console solved the issue, which I didn't do before, so as far as I can see your solution works.

My tsconfg.json looks like this now:

"compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    ..... 
    "skipLibCheck": true
  },

Thanks for your help!

AndyGup · Answer

@JavidYousafand @BillMitchell  can someone provide a minimal repro sample where skipLibCheck is true and you still see the errors? The core Angular sample is the best starting point: https://github.com/Esri/jsapi-resources/tree/main/core-samples/jsapi-angular-cli. Here's our recommendations for creating and sharing the sample: https://developers.arcgis.com/javascript/latest/troubleshooting/#minimal-reproducible-application.

JavidYousaf · Answer

I just updated a project to Angular 19 and am experiencing this same issue using the latest version of @ArcGIS/core (4.31.6):

✘ [ERROR] TS1203: Export assignment cannot be used when targeting ECMAScript modules. Consider using 'export default' or another module format instead. [plugin angular-compiler]

node_modules/@arcgis/core/core/reactiveUtils.d.ts:4:0:
      4 │ export = reactiveUtils;
        ╵ ~~~~~~~~~~~~~~~~~~~~~~~

Do you have a fix for this yet as I tried setting skipLibCheck to true in tsconfig.json but that didn't work.