My web application is built using ASP.Net MVC + angular and currently has over 500 active users.
We encounter a recurring issue whenever we perform a new publish or release - we have to instruct our users to clear their browser cache, which can be quite frustrating for them.
I'm curious to know how websites like Facebook manage browser cache when updating their applications/sites, as we don't regularly clear ours.
Is there a way to automatically clear the browser cache upon a new release?
ASP.Net Core MVC offers a convenient solution for managing script files using the asp-append-version TagHelper. This TagHelper computes a hash of the file and appends it to the filename, ensuring cachebusting:
<link rel="stylesheet" type="text/css" href="myfile.css" asp-append-version="true" />
<script src="myfile.js" asp-append-version="true"></script>
This results in transformed file references like this:
<link rel=stylesheet href="myfile.css?v=qWYa_XOt9FCnEt2z8CjC7apiyjA5l9UA9UCqT028LI">
<script src="myfile.js?v=eN9kwxdWtX5aP8H3TFVOQrwu08Qndyktg5kvpSLa1A">
If you want to include a version number in your file, you can do it like this
<script type="text/javascript" src="pathTofile.some.js?v1"></script>
Anything can come after the ?. Using a query string helps prevent caching issues and prompts the browser to load a different file, invalidating the cached one.
An effective way to implement cache busting is by utilizing a task runner such as grunt or gulp.
Utilizing file-calculated hashes can also enhance cache busting efficiency, ensuring that files are only cached when they have been modified (which ultimately improves performance).
For an example of how to do this, check out: https://github.com/shakyShane/grunt-cache-breaker (similar tools are available for other task runners)
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