How to cache js file added by js script on click in browser?

Question

JavaScript

Greetings! It is not possible to save the js-file in the browser cache, which is loaded while working with the site (so that the next time it is loaded from the cache).
The file URL does not change, the content does too.
Headers are sent

Cache-control: public
Expires: Wed, 31 Mar 2021 21:47:18 GMT
Pragma: no-cache

Added to the end of body

...

<script src="/path/to/file/" type="text/javascript"></script>
</body>
</html>