topic Re: fetch external link in Custom Visuals Development Discussion

fetch external link

smpa01 — Thu, 28 May 2026 23:51:21 GMT

@dm-p I could not fetch while developing this , I had to locally bundle the json, I was wondeing is there a workaround to fetch external link ?

const TOPO_URL = 'https://cdn.jsdelivr.net/npm/world-atlas@2/countries-110m.json'; const world = await fetch(TOPO_URL).then(r => r.json());

Thank you in advance.

Re: fetch external link

dm-p — Fri, 29 May 2026 01:40:34 GMT

Hi @smpa01,

Did you enable the web access privilege? This is the first thing I'd check.

This doesn't necessarily mean a fetch will work, though. A custom visual is still a sandboxed iframe with null origin, even if this is enabled. However, you should get a meaningful error in the browser console if you do attempt it. If cdn.jsdelivr.net does not allow cross-origin requests, you won't be able to serve from there and may need to find a suitable server that does.

Regards,

Daniel

Re: fetch external link

davidwarner344 — Mon, 08 Jun 2026 04:48:12 GMT

Bundling the JSON locally is usually the safest solution. Power BI visuals often restrict external URL fetches, so unless the endpoint is explicitly allowed, direct requests may not work.