text-encoding-identifier-case error in JSX; utf8 is not valid HTML

[jp-knj]

According to WhatWG, the value must be an ASCII case-insensitive match for "UTF-8"

please text-encoding-identifier-case of rule check
Thanks for always helping us out

example
This is causing conflicts in our React code (in .tsx files that are linted by eslint):

<form
  id="search_keyword"
  method="get"
  action={action}
  acceptCharset="UTF-8" // get eslint error
>
  <input
    type="search"
    name="q"
    id="q"
  />
        ....
</form>

[Pyrolistical]

Similarly new TextDecoder("utf-8") is another false positive as according to the spec:

Authors must use the UTF-8 encoding and must use its (ASCII case-insensitive) "utf-8" label to identify it.

utf-8 is canonical

[fisker]

It's hard to check places that only allows utf-8, but utf-8 works everywhere (I think), how about we switch from utf8 to use utf-8?

Mentioned this problem in original proposal, #1690 (comment)

[timdavish]

It's hard to check places that only allows utf-8, but utf-8 works everywhere (I think), how about we switch from utf8 to use utf-8?

Mentioned this problem in original proposal, #1690 (comment)

Does it make sense to make this configurable, at a minimum? I know you originally proposed configurability here: #1690 (comment)

[fisker]

Make sense to me.