doc: update isUtf8 description

anonrig · anonrig · commit c46e57c07add · 2022-12-25T12:24:41.000-05:00
diff --git a/doc/api/buffer.md b/doc/api/buffer.md
@@ -5137,9 +5137,13 @@ added: REPLACEME
 -->
 
 * input {Buffer | ArrayBuffer | TypedArray} The input to validate.
-* Returns: {boolean} Returns `true` if and only if the input is valid UTF-8.
+* Returns: {boolean}
+
+This function is used to check if input contains invalid UTF-8 code points
+(characters). Returns `true` if and only if the input does not contain
+non UTF-8 characters.
 
-This function is used to check if input contains UTF-8 code points (characters).
+Throws if the `input` is a detached array buffer.
 
 ### `buffer.INSPECT_MAX_BYTES`
 
