Minified JS has no Expires header

  • I have some javascript files combined and deferred using W3TC minification.
    GTMetrix tells me that these combined files (with names such as “badb8.default.include.5af286.js”) have no far-future expiration dates.
    Actually, these .js aggregates have no expiration dates at all. Their cache control headers say “no-cache”, “no-store”.
    At the same time, other, normal .js files are provided proper Expires & cache control headers by my server.
    Why do minified JS files have no expiration dates?
    What can I do to set their expiration dates and will I benefit from this?

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