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Document: characterSet property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

The Document.characterSet read-only property returns the character encoding of the document that it's currently rendered with.

Note: A "character set" and a "character encoding" are related, but different. Despite the name of this property, it returns the encoding.

A string.

console.log(document.characterSet);
// document's character encoding, such as "ISO-8859-1" or "UTF-8"

Specification
DOM> # ref-for-dom-document-characterset①>

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`characterSet`	1 1 `charset` alias was made read-only in Chrome 45. 1	121212	1441.5	≤12.1 15 `charset` alias was made read-only in Opera 45. 15	333	18 18 `charset` alias was made read-only in Chrome Android 45. 18	4444	≤12.1 14 `charset` alias was made read-only in Opera 45. 14	111	1.0 1.0 `charset` alias was made read-only in Samsung Internet 5.0. 1.0	1 1 `charset` alias was made read-only in WebView 45. 1	111

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https://developer.mozilla.org/en-US/docs/Web/API/Document/characterSet