topic ArcGIS JS API 3.x CDN Lifetime in ArcGIS JavaScript Maps SDK Questions

ArcGIS JS API 3.x CDN Lifetime

Muhammad_AzhaziqBin_Mohd_Azlan — Thu, 27 Nov 2025 07:41:51 GMT

Hi,

I have returning client that currently run a web application using ArcGIS JS API 3.x and it directly referencing 3.x API using CDN.

Anyone knows how long the 3.x library will be available via CDN?

Re: ArcGIS JS API 3.x CDN Lifetime

BlakeTerhune — Mon, 01 Dec 2025 14:19:43 GMT

ArcGIS API for JavaScript, Version 3.x Retirement

ArcGIS API 3.x for JavaScript was retired on July 1, 2024.
...
After retirement, the 3.x API will remain hosted on our CDN for a multi-year grace period

Your guess on how long a "multi-year grace period" actually is. I would say two years is probably the shortest time. For safety, you should probably plan to migrate from 3.x in 2026.

Re: ArcGIS JS API 3.x CDN Lifetime

Muhammad_AzhaziqBin_Mohd_Azlan — Tue, 02 Dec 2025 01:37:44 GMT

Ok. I did discuss with my colleague and we also guessing "multi-year grace period" meant. But certainly, we need to plan for the migration in 2026.

Re: ArcGIS JS API 3.x CDN Lifetime

BlakeTerhune — Tue, 02 Dec 2025 17:14:41 GMT

Hopefully you got the information you needed. If that answered your question, please mark it as an accepted solution so others visiting this post will know. Thanks!