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Add preload_link_tag helper. #31251
This helper creates a link tag with preload keyword that allows to the browser to initiate early fetch of resources (different to the specified in
See 59a02fb for more details about Early Hints.
Preload spec: https://w3c.github.io/preload/
Nov 29, 2017
@matthewd sorry, missed your comment before of merging, probably those types aren't common enough in HTTP responses but I decided to include those in this set because it seems to be the unique way we can lookup the mime types using only the extension.
I was planning to leave the
My concern about moving from a list of very common files to all "reasonable" files, is that it opens us up to a lot of future churn.
And on a very relevant note: it also pretty much obliges us to maintain the values forever. You've removed an existing definition, which will break people's existing applications without a deprecation. We can't do that.
I haven't even heard of half of these things, so I'd rather not be stuck keeping them in a list forever, just to support a small number of users (both because of a rare filetype, and a currently rare feature).
How about we trim the list for now, and just make the helper raise if we don't know the type? That way people will be forced to either specify it as an option, or register the type for themselves.