How To Update Javascript Cache

[Nick Mudge]

When I deploy my Luminus application to production my users do not get the newest javascript "/js/app.js" file that is generated from clojurescript/reframe.  This file is cached in my users browsers.

What is the best way to fix this problem?

Thanks

Nick Mudge

[Dmitri]

Hi,

The most common way to address this is to add a timestamp to the Js file. If you're using Selmer for HTML templating, then you'd want to add something like the following:

<script src="{{servlet-context}}/js/app.js?{{timestamp}}" type="text/javascript"></script>

Then in the layout namespace you'd create a timestamp generated when the app compiles:

(def timestamp (.getTime (java.util.Date.)))

and pass it to the template in the render function as :timestamp

Here's an example in project for reference:

https://github.com/yogthos/memory-hole/blob/a78659415488be57e60975d9f2bcfa4a610c7cde/resources/templates/home.html#L32
https://github.com/yogthos/memory-hole/blob/a78659415488be57e60975d9f2bcfa4a610c7cde/src/clj/memory_hole/layout.clj#L15

[Nick Mudge]

Yes, this is very helpful. Thanks Dmitri.

Nick