Avatar for Username

Mozilla サポートの検索

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

詳しく学ぶ

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

HTML page content type has charset=iso-8859-1 but document.characterSet is 'UTF-8'

  • 2 件の返信
  • 2 人がこの問題に困っています
  • 5 回表示
  • 最後の返信者: gilles.poirot

gilles.poirot
gilles.poirot
more options

Hi,

I'm a web developer and I have an issue document.characterSet property from DOM API has an incorrect value on a non UTF-8 page

Firefox version: 95.0.2

1. HTML page is returned with following content-type content-type: text/html; charset=iso-8859-1

2. JavaScript code in the page reads document.characterSet property

Expected characterSet value is "ISO-8859-1"

Actual characterSet value is "UTF-8"

Thanks and regards,

Hi, I'm a web developer and I have an issue document.characterSet property from DOM API has an incorrect value on a non UTF-8 page Firefox version: 95.0.2 1. HTML page is returned with following content-type content-type: text/html; charset=iso-8859-1 2. JavaScript code in the page reads document.characterSet property Expected characterSet value is "ISO-8859-1" Actual characterSet value is "UTF-8" Thanks and regards,

すべての返信 (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

What encoding does the server send ?

If the server sends encoding "UTF-8" then that prevails and Firefox ignores a possible specification in the actual file for security reasons.

gilles.poirot
gilles.poirot 質問者
more options

I observed this behavior while working on a customer incident. The server responds with a content-type header which is "text/html; charset=iso-8859-1"

I tried to reproduce on a sample but in my test, I get the expected "window-1252".

However, if the response body contains an UTF-8 BOM, content-type header is ignored and document characterSet is "UTF-8"

Here is a small sample https://glitch.com/edit/#!/document-charset

Is this the intended behavior?