Prevent browser caching of javascript packs, using a hash in the filename

[mikeyhew]

Chrome keeps running old versions of application.js, unless I disable the cache in developer tools. This doesn't happen with sprockets because it includes a hash of the file's contents in the filename, preventing chrome from loading the file from cache unless the hash is the same.

Can we add this feature to webpacker? How would you recommend it be implemented?

[ytbryan]

I guess you are referring to development mode.

Because the hash is already available during production. So we can just switch it on for development? cc @gauravtiwari

[gauravtiwari]

@ytbryan Yeah, we can do that, although I never had this problem :) but makes sense to just follow what sprockets is doing so, it works for all cases 👍

[mikeyhew]

@ytbryan @gauravtiwari That sounds good. Where is the config for this?

[mikeyhew]

Never mind, I found it. See the above pull request. Are any tests needed?

[dhh]

Need to set the right cache-control headers like sprockets does.