topic Re: Deploying custom widget to Portal in ArcGIS Experience Builder Questions

Deploying custom widget to Portal

clc — Sat, 21 Feb 2026 20:19:25 GMT

I had to modify one of my custom widget that I wrote 2 years ago. It runs fine in Experience Builder Developer edition 1.19. But I cannot make it work in my server.

First I could not find a dist-prod folder. After some searching I realized that I needed now to run: npm run build:for-download which creates a dist-download folder.

Then I copy my widget from this dist-download folder to my wwwroot directory (where the old one was). When I run the new widget in my experience I got the following error:

Cannot read properties of undefined (reading '__set_webpack_public_path__')

Any suggestions on what is happening? Thanks

Re: Deploying custom widget to Portal

clc — Sun, 22 Feb 2026 01:26:27 GMT

Not an ideal solution, but I put my new code in Experience Builder Developer edition 1.15 and run: npm run build:prod. Using this build works.

Re: Deploying custom widget to Portal

JeffreyThompson2 — Mon, 23 Feb 2026 13:37:52 GMT

https://developers.arcgis.com/experience-builder/guide/release-versions/

Actually that is the correct solution, in order for a Custom Widget to run in Enterprise, it must be compiled in a compatible version of Developer Edition. Currently, there is no compatible Enterprise version with 1.19.

Re: Deploying custom widget to Portal

clc — Mon, 23 Feb 2026 17:23:34 GMT

Thanks a lot for reassuring