[Solved] Clearing Browser Cache after upgrade

[Toya]

Whenever we upgrade to a newer version our users get the error message below and they have to ctrl-F5 to clear the browser cache. Is there a way to prevent the user having to do this after upgrade?

[Ivet]

Hi Toya,

Thank you for the screenshot with the error message.

The error you encountered is usually caused by the fact that browsers tend to cache the stale JS/CSS/HTML resources of the viewer's previous version. As you have noticed, clearing the browser cache resolves this.

You can specify the new version directly in the URL for the viewer JavaScript. For example:

<script src="/api/reports/resources/js/telerikReportViewer-19.1.25.716.min.js"></script>

I hope the above information will be useful. Let me know if you have other questions.

Regards,
Ivet
Progress Telerik

[Toya]

Where is that javascript located? We just updated server again and have that same error.

[Toya]

We host our report server from a Blazor application and on a web server.

[Ivet]

The viewer JS is served from two places:

• Static script reference in your Blazor host page (_Host.cshtml, App.razor, or index.html) - this is the file the browser caches
• Dynamically loaded resources from the REST service endpoint. These already have version-based filenames (e.g., telerikReportViewer.kendo-19.1.25.716.min.js) and include appropriate Cache-Control headers via ResourcesEngine.cs