Mime for JS files: When does TypeByExtension return application/javascript or text/javascript?

[tushardas]

What version of Go are you using (go version)?

$ go version
go version go1.16.3 darwin/amd64

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"

What did you do?

I'm using mime package to determine the content type for a .js file
https://play.golang.org/p/qc95mVBT6fJ

What did you expect to see?

My expectation is it should output the same value in local terminal as well as Github actions(where my tests are run)

Also, we have had this tests from long now and the output used to be application/javascript always. Have started seeing text/javascript; charset=utf-8 today(23-Aug) only

What did you see instead?

In playground and in Github Actions(where my tests are run), the output is text/javascript; charset=utf-8
Whereas in my local terminal the output for the same is application/javascript

[seankhliao]

Duplicate of #32350